Tootfinder

This https://arxiv.org/abs/2309.03987 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Neutron spin echo is a "quantum tale of two paths''
We describe an experiment that strongly supports a two-path interferometric model in which the spin-up and spin-down components of each neutron propagate coherently along spatially separated parallel paths in a typical neutron spin echo small angle scattering (SESANS) experiment. Specifically, we show that the usual semi-classical, single-path treatment of Larmor precession of a polarized neutron in an external magnetic field predicts a damping as a function of the spin echo length of the SESAN…

Spin-resolved counting statistics as a sensitive probe of spin correlation in transport through a quantum dot spin valve
Guanjian Hu, Shikuan Wang, Jing Hu, RuiQiang Li, Yiying Yan, JunYan Luo
https://arxiv.org/abs/2403.08621

Spin-resolved counting statistics as a sensitive probe of spin correlation in transport through a quantum dot spin valve
We investigate the noise in spin transport through a single quantum dot (QD) tunnel coupled to ferromagnetic electrodes with noncollinear magnetizations. Based on a spin-resolved quantum master equation, auto- and cross-correlations of spin-resolved currents are analyzed to reveal the underlying spin transport dynamics and characteristics for various polarizations. We find the currents of majority and minority spins could be strongly autocorrelated despite uncorrelated charge transfer. The inte…

So I had a crazy idea... I want to try the "Pay What You Want" thing again when selling art, but offer people who can't decide on an amount a chance to "spin the wheel" and then decide if they want to pay the amount they spin.
It would be between $5 and $35 or something.
Is that too crazy or could it work?
I could always let them decide to walk away and not go through with the sale or something.

This https://arxiv.org/abs/2402.05704 has been replaced.
link: https://scholar.google.com/scholar?q=a

$\mathcal{N}=2$ higher-spin theories and harmonic superspace
A brief review of the harmonic superspace approach to the construction of $\mathcal{N}=2$ supersymmetric higher spin theories is given. We define off-shell analytic harmonic gauge potentials of $\mathcal{N}=2$ supersymmetric higher-spin multiplets and of $\mathcal{N}=2$ superconformal higher-spin multiplets for an arbitrary integer highest spin. The component contents of these $\mathcal{N}=2$ higher-spin supermultiplets are explicitly presented. We also construct their cubic couplings to the hy…

It is not just electric cars, heat pumps, batteries and solar inverters that can be made smart: your radiators too. A Swiss university spin-off aims to optimise individual radiators, taking into account the thermal properties of the room, the forecast weather, etc.
It can make existing central heating systems (e.g. for apartment blocks) or district heating more energy efficient.

Technical Design Report of the Spin Physics Detector at NICA
The SPD Collaboration, et al.
https://arxiv.org/abs/2404.08317 https://a…

Technical Design Report of the Spin Physics Detector at NICA
The Spin Physics Detector collaboration proposes to install a universal detector in the second interaction point of the NICA collider under construction (JINR, Dubna) to study the spin structure of the proton and deuteron and other spin-related phenomena using a unique possibility to operate with polarized proton and deuteron beams at a collision energy up to 27 GeV and a luminosity up to $10^{32}$ cm$^{-2}$ s$^{-1}$. As the main goal, the experiment aims to provide access to the gluon TMD PDFs…

Three-flavor, Full Momentum Space Neutrino Spin Oscillations in Neutron Star Mergers
Henry Purcell, Sherwood Richers, Amol V. Patwardhan, Francois Foucart
https://arxiv.org/abs/2404.08159

Three-flavor, Full Momentum Space Neutrino Spin Oscillations in Neutron Star Mergers
In the presence of anisotropic neutrino and antineutrino fluxes, the quantum kinetic equations drive coherent oscillations in neutrino helicity, frequently referred to as spin oscillations. These oscillations depend directly on the absolute mass scale and Majorana phase, but are usually too transient to produce important effects. In this paper we present a full momentum-space analysis of Majorana neutrino spin oscillations in a snapshot of a three-dimensional neutron star merger simulation. We …

On sampling diluted Spin Glasses using Glauber dynamics
Charilaos Efthymiou, Kostas Zampetakis
https://arxiv.org/abs/2403.08921 https://

On sampling diluted Spin Glasses using Glauber dynamics
Spin-glasses are Gibbs distributions that have been studied in CS for many decades. Recently, they have gained renewed attention as they emerge naturally in learning, inference, optimisation etc. We consider the Edwards-Anderson (EA) spin-glass distribution at inverse temperature $β$ when the underlying graph is an instance of $G(n,d/n)$. This is the random graph on $n$ vertices where each edge appears independently with probability $d/n$ and $d=Θ(1)$. We study the problem of approximate sa…

Comparing quantum fluctuations in the spin-$\frac{1}{2}$ and spin-$1$ XXZ Heisenberg models on square and honeycomb lattices
Masahiro Kadosawa, Masaaki Nakamura, Yukinori Ohta, Satoshi Nishimoto
https://arxiv.org/abs/2404.08099

Comparing quantum fluctuations in the spin-$\frac{1}{2}$ and spin-$1$ XXZ Heisenberg models on square and honeycomb lattices
We present a detailed investigation of the XXZ Heisenberg model for spin-$1/2$ and spin-$1$ systems on square and honeycomb lattices. Utilizing the density-matrix renormalization group (DMRG) method, complemented by Spiral Boundary Conditions (SBC) for mapping two-dimensional (2D) clusters onto one-dimensional (1D) chains, we meticulously explore the evolution of staggered magnetization and spin gaps across a broad spectrum of easy-axis anisotropies. Our study reveals that, despite the lower si…

🔊 #NowPlaying on fip
Vanishing Twin:
🎵 It sends my heart into a spin
#VanishingTwin
https://open.spotify.com/track/1srC35lGWOkm77ZTRdbwEb
https://v-twin.bandcamp.com/track/it-sends-my-heart-into-a-spin

This https://arxiv.org/abs/2403.05954 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Unlocking Heisenberg Sensitivity with Sequential Weak Measurement Preparation
We propose a state preparation protocol based on sequential measurements of a central spin coupled with a spin ensemble, and investigate the usefulness of the generated multi-spin states for quantum enhanced metrology. Our protocol is shown to generate highly entangled spin states, devoid of the necessity for non-linear spin interactions. The metrological sensitivity of the resulting state surpasses the standard quantum limit, reaching the Heisenberg limit under symmetric coupling strength cond…

Microscopic Study on Superexchange Dynamics of Composite Spin-1 Bosons
An Luo, Yong-Guang Zheng, Wei-Yong Zhang, Ming-Gen He, Ying-Chao Shen, Zi-Hang Zhu, Zhen-Sheng Yuan, Jian-Wei Pan
https://arxiv.org/abs/2403.09205

Microscopic Study on Superexchange Dynamics of Composite Spin-1 Bosons
We report on an experimental simulation of the spin-1 Heisenberg model with composite bosons in a one-dimensional chain based on the two-component Bose-Hubbard model. Exploiting our site-and spin-resolved quantum gas microscope, we observed faster superexchange dynamics of the spin-1 system compared to its spin-1/2 counterpart, which is attributed to the enhancement effect of multi-bosons. We further probed the non-equilibrium spin dynamics driven by the superexchange and single-ion anisotropy …

I am more liable to want to spin up a $5 VPS to solve a problem than to try to write a static site
this probably indicates how much I like Linux, and how little I like writing blog posts.

NRC beschrijft het goed:
"Het is opvallend hoe eenvoudig met name VVD en NSC zich in een meerderheidscoalitie met de PVV hebben laten praten. Het zal de komende dagen veel gaan over de ‘unieke’ vorm die is gekozen, maar dat is óók spin. Opvallend is juist hoe zeer deze variant lijkt op eerdere meerderheidskabinetten. Voor VVD, NSC en BBB betekent dat dat ze iets uit te leggen hebben."

Wat vindt NRC | VVD en NSC zijn wel heel snel gezwicht voor de lokroep van de PVV om mee te mogen regeren
Kabinetsformatie

This https://arxiv.org/abs/2307.10369 has been replaced.
initial toot: https://mastoxiv.page/@a…

Enumeration and representation theory of spin space groups
Those fundamental physical properties, such as phase transitions, Weyl fermions, and spin excitation, in all magnetic ordered materials, were ultimately believed to rely on the symmetry theory of magnetic space groups. Recently, it has come to light that a more comprehensive group, known as the spin space group (SSG), which combines separate spin and spatial operations, is necessary to fully characterize the geometry and underlying properties of magnetic ordered materials. However, the basic th…

On the average spin Chern number
Rafael Gonzalez-Hernandez, Bernardo Uribe
https://arxiv.org/abs/2404.08595 https://arxiv.org/pdf/240…

On the average spin Chern number
In this letter, we propose the average spin Chern number (ASCN) as an indicator of the topological significance of the spin degree of freedom within insulating materials. Whenever this number is a non-zero even integer, it distinguishes the material as a spin Chern insulator and the number is a topological invariant. If this number is not zero, it indicates that the material has non-trivial spin transport properties, and it lies close to the value of the spin Hall conductivity (SHC) within the …

This https://arxiv.org/abs/2402.00134 has been replaced.
link: https://scholar.google.com/scholar?q=a

Investigations of $Λ$ states with spin-parity $\frac{3}{2}^{\pm}$
The present study provides spectroscopic investigations of spin-$\frac{3}{2}$ $Λ$ baryons with both positive and negative parities. The analysis mainly focuses on three states, namely $1P$, $2P$, and $2S$, and corresponding masses are calculated using the QCD sum rule method. To implement the method, we apply two types of interpolating currents with octet and singlet quantum numbers and compare the corresponding results with the reported masses of experimentally observed states. From the compa…

Three-flavor, Full Momentum Space Neutrino Spin Oscillations in Neutron Star Mergers
Henry Purcell, Sherwood Richers, Amol V. Patwardhan, Francois Foucart
https://arxiv.org/abs/2404.08159

Three-flavor, Full Momentum Space Neutrino Spin Oscillations in Neutron Star Mergers
In the presence of anisotropic neutrino and antineutrino fluxes, the quantum kinetic equations drive coherent oscillations in neutrino helicity, frequently referred to as spin oscillations. These oscillations depend directly on the absolute mass scale and Majorana phase, but are usually too transient to produce important effects. In this paper we present a full momentum-space analysis of Majorana neutrino spin oscillations in a snapshot of a three-dimensional neutron star merger simulation. We …

This https://arxiv.org/abs/2402.02670 has been replaced.
link: https://scholar.google.com/scholar?q=a

On the integrability of extended test body dynamics around black holes
In general relativity, the motion of an extended test body is influenced by its proper rotation, or spin. We present a covariant and physically self-consistent Hamiltonian framework to study this motion, up to quadratic order in the body's spin, including a spin-induced quadrupole, and in an arbitrary background spacetime. The choice of spin supplementary condition and degeneracies associated with local Lorentz invariance are treated rigorously with adapted tools from Hamiltonian mechanics. App…

This https://arxiv.org/abs/2403.02699 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Existence of de Almeida-Thouless-type instability in the transverse field Sherrington-Kirkpatrick model
The interpolation method for mean field spin glass models developed by Guerra and Talagrand is extended to a quantum mean field spin glass model. This extension enables us to obtain both replica-symmetric (RS) and one step replica-symmetry breaking (1RSB) solutions of the free energy density in the transverse field Sherrington-Kirkpatrick model. It is shown that the RS solution is exact in the paramagnetic phase. We provide a sufficient condition on coupling constants where the 1RSB solution gi…

Discrete Laplacian thermostat for flocks and swarms: the fully conserved Inertial Spin Model
Andrea Cavagna, Javier Crist\'in, Irene Giardina, Tomas S. Grigera, Mario Veca
https://arxiv.org/abs/2403.07644

Discrete Laplacian thermostat for flocks and swarms: the fully conserved Inertial Spin Model
Experiments on bird flocks and midge swarms reveal that these natural systems are well described by an active theory in which conservation laws play a crucial role. By building a symplectic structure that couples the particles' velocities to the generator of their internal rotations (spin), the Inertial Spin Model (ISM) reinstates a second-order temporal dynamics that captures many phenomenological traits of flocks and swarms. The reversible structure of the ISM predicts that the total spin is …

Nodal d-wave pairing from spin fluctuations in a thermally disordered anti-ferromagnet
Nick Bultinck
https://arxiv.org/abs/2403.07999 https://

Nodal d-wave pairing from spin fluctuations in a thermally disordered anti-ferromagnet
We consider electron pairing in a two-dimensional thermally disordered itinerant anti-ferromagnet. It is shown that transverse spin fluctuations in such a state can give rise to superconductivity with a sizeable critical temperature $T_c$. Below $T_c$ there is quasi-long-range spin-singlet and $d_{x^2-y^2}$ superconducting order, together with fluctuating triplet order at momentum $(π,π)$. The singlet pairs we find are tightly bound together, and the pair wavefunction has a purely inter-subla…

Quantum Many-Body Scars for Arbitrary Integer Spin in $2 1$D~Abelian Gauge Theories
Thea Budde, Marina Krsti\'c Marinkovi\'c, Joao C. Pinto Barros
https://arxiv.org/abs/2403.08892

Quantum Many-Body Scars for Arbitrary Integer Spin in $2+1$D~Abelian Gauge Theories
The existence of Quantum Many-Body Scars, high-energy eigenstates that evade the Eigenstate Thermalization Hypothesis, has been established across different quantum many-body systems, including gauge theories corresponding to spin-1/2 Quantum Link Models. We systematically identify scars for pure gauge theories with arbitrarily large integer spin $S$ in $2+1$D, concretely for Truncated Link Models, where the electric field is restricted to $2S+1$ states per link. Through an explicit analytic co…

SPIN: Simultaneous Perception, Interaction and Navigation
Shagun Uppal, Ananye Agarwal, Haoyu Xiong, Kenneth Shaw, Deepak Pathak
https://arxiv.org/abs/2405.07991

This https://arxiv.org/abs/2312.14913 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Compton Amplitude for Rotating Black Hole from QFT
We construct a candidate tree-level gravitational Compton amplitude for a rotating Kerr black hole, for any quantum spin $s=0,1/2,1,\dots, \infty$, from which we extract the corresponding classical amplitude to all orders in the spin vector $S^μ$. We use multiple insights from massive higher-spin quantum field theory, such as massive gauge invariance and improved behavior in the massless limit. A chiral-field approach is particularly helpful in ensuring correct degrees of freedom, and for writ…

Giving #NomadBSD a spin
https://ludovic.hirlimann.net/2024/05/giving-nomadbsd-spin.html

Giving NomadBSD a spin

This https://arxiv.org/abs/2308.11156 has been replaced.
initial toot: https://mastoxiv.page/@a…

Observation of Current-induced Nonlinear Spin Polarization in Pt-Py Bilayers
We experimentally observe nonlinear spin polarization in metallic bilayers of platinum and permalloy by means of spin-torque ferromagnetic resonance (ST-FMR) with the spin-Hall effects. The ST-FMR results under massive dc current injection contain striking features, which are not caused by extrinsic Joule heating, but by intrinsic nonlinear spin polarization. The emergence of nonlinear spin polarization is consistent with observation of unidirectional spin-Hall magnetoresistance due to magnon g…

NRC beschrijft het goed:
"Het is opvallend hoe eenvoudig met name VVD en NSC zich in een meerderheidscoalitie met de PVV hebben laten praten. Het zal de komende dagen veel gaan over de ‘unieke’ vorm die is gekozen, maar dat is óók spin. Opvallend is juist hoe zeer deze variant lijkt op eerdere meerderheidskabinetten. Voor VVD, NSC en BBB betekent dat dat ze iets uit te leggen hebben."

Wat vindt NRC | VVD en NSC zijn wel heel snel gezwicht voor de lokroep van de PVV om mee te mogen regeren
Kabinetsformatie

Small field chaos in spin glasses: universal predictions from the ultrametric tree and comparison with numerical simulations
Miguel Aguilar-Janita, Silvio Franz, Victor Martin-Mayor, Javier Moreno-Gordo, Giorgio Parisi, Federico Ricci-Tersenghi, Juan J. Ruiz-Lorenzo
https://arxiv.org/abs/2403.08503…

Small field chaos in spin glasses: universal predictions from the ultrametric tree and comparison with numerical simulations
We study the chaotic behavior of the Gibbs state of spin-glasses under the application of an external magnetic field, in the crossover region where the field intensity scales proportional to $1/\sqrt{N}$, being $N$ the system size. We show that Replica Symmetry Breaking (RSB) theory provides universal predictions for chaotic behavior: they depend only on the zero-field overlap probability function $P(q)$ and are independent of other features of the system. Using solely $P(q)$ as input we can an…

You can spin the whole "people leave if you ask them to go back to office" thing as "stupid companies" but given how they are currently all trying to juice their stock value with layoffs doing that work for them doesn't sound like them being dumb, it saves on severance and shit.
https://www.

Ordered back to the office, top tech talent left instead, study finds
In the months following return-to-office mandates, an increased number of senior employees departed Apple, Microsoft and SpaceX, often to work for competitors.

Evolution of Spin in the Intermediate Polar CC Sculptoris
John A. Paice, S. Scaringi, N. Castro Segura, A. Sahu, K. Ilkiewicz, Deanne L. Coppejans, D. De Martino, C. Knigge, M. Veresvarska
https://arxiv.org/abs/2405.05127

Evolution of Spin in the Intermediate Polar CC Sculptoris
We report on spin variations in the intermediate polar and cataclysmic variable CC Scl, as seen by the Transiting Exoplanet Survey Satellite (TESS). By studying both the spin period and its harmonic, we find that the spin has varied since it was first observed in 2011. We find the latest spin value for the source to be 389.473(6)s, equivalent to 0.00450779(7) days, 0.02s shorter than the first value measured. A linear fit to these and intermediate data give a rate of change of spin ~-4.26(2.66)…

Spin-coupled molecular orbitals: chemical intuition meets quantum chemistry
Daniel Marti-Dafcik, Nicholas Lee, Hugh G. A. Burton, David P. Tew
https://arxiv.org/abs/2402.08858

Spin-coupled molecular orbitals: chemical intuition meets quantum chemistry
Molecular orbital theory is powerful both as a conceptual tool for understanding chemical bonding, and as a theoretical framework for ab initio quantum chemistry. Despite its undoubted success, MO theory has well documented shortcomings, most notably that it fails to correctly describe diradical states and homolytic bond fission. In this contribution, we introduce a generalised MO theory that includes spin-coupled radical states. We show through archetypical examples that when bonds break, the …

Enhancing energy storage crossing quantum phase transitions in an integrable spin quantum battery
Riccardo Grazi, Daniel Sacco Shaikh, Maura Sassetti, Niccol\`o Traverso Ziani, Dario Ferraro
https://arxiv.org/abs/2402.09169

Enhancing energy storage crossing quantum phase transitions in an integrable spin quantum battery
We investigate the performance of a one dimensional dimerized XY chain as a quantum battery. Such integrable model shows a rich quantum phase diagram which emerges through a mapping of the spins into auxiliary fermionic degrees of freedom. We consider a charging protocol relying on the double quench of an internal parameter, notably the strength of the dimerization. Within this picture we observe a substantial enhancement of the energy stored per spin as a consequence of driving the system acro…

Exact deconfined gauge structures in the higher-spin Yao-Lee model: a quantum spin-orbital liquid with spin fractionalization and non-Abelian anyons
Zhengzhi Wu, Jing-yun Zhang, Hong Yao
https://arxiv.org/abs/2404.07261

Exact deconfined gauge structures in the higher-spin Yao-Lee model: a quantum spin-orbital liquid with spin fractionalization and non-Abelian anyons
The spin-S Kitaev model has recently been shown to definitely exhibit topological order with spin liquid ground states for half-integer spin, but could be trivially gapped insulators for integer spin. This interesting "even-odd" effect is largely due to the fermionic (bosonic) $\mathbb{Z}_2$ gauge charges for half-integer (integer) spin. In this Letter, we theoretically show that a spin-S Yao-Lee model (a spin-orbital model with SU(2) spin-rotation symmetry) possesses exact deconfined fermionic…

Spin-orbit coupling in symmetric and mixed spin-symmetry
Ayaka Usui, Abel Rojo-Franc\`as, James Schloss, Bruno Juli\'a-D\'iaz
https://arxiv.org/abs/2403.07188

Spin-orbit coupling in symmetric and mixed spin-symmetry
Synthetically spin-orbit coupling in cold atoms couples the pseudo-spin and spatial degrees of freedom, and therefore the inherent spin symmetry of the system plays an important role. In systems of two pseudo-spin degrees, two particles configure symmetric states and anti-symmetric states, but the spin symmetry can be mixed for more particles. We study the role of mixed spin symmetry in the presence of spin-orbit coupling and consider the system of three bosons with two hyper-fine states trappe…

This https://arxiv.org/abs/2310.13442 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

A Study on the Well-Posedness of 1D Energy-Critical Half-Wave Maps Equations
In this article, we study the well-posedness of the energy-critical half-wave maps equation (HWM) in dimension $1$. The half-wave maps equation emerges from the continuum limit of the Haldane Shastry spin chains and has been shown to arise as the continuum limit of Calogero-Moser classical spin systems. In higher dimension $d\geq 5$, it has been shown that (HWM) is well-posed in \cite{krieger2017small}. This result has been improved in \cite{kiesenhofer2021small} to $d = 4$ but the Strichartz e…

I saw a legit online article the other day on 'prompt engineering 'for humans interlocutors. Detailing basic conversation skills, but with a literally dehumanising spin.
[Pr Farnsworth: "I don't want to live on this planet anymore"
#promptengineering

Top Spin
Weak, I know, but I've given up on little monsters for a bit. Too frustrating. Instead, Kieron's been persuading me to play Top Spin a little more. I got it ages and ages ago (when Woolies was doing it for £13 instead of the then-RRP of £40) and thought it was OK, but not as good as Virtua Tennis.
https://

"Pro-#Israel spin and complicit mainstream media claim UN report upheld Israel’s claims – it didn’t and even the UN’s political collusion collapses under scrutiny" #Gaza
Video: ‘unfounded, unverified’ – what UN really said about Israel’s ‘Hamas rape’ claims – SKWAWKBOX

Video: ‘unfounded, unverified’ – what UN really said about Israel’s ‘Hamas rape’ claims
Pro-Israel spin and complicit mainstream media claim UN report upheld Israel’s claims – it didn’t and even the UN’s political collusion collapses under scrutiny Israel’…

Spin-Wave Voices: Sonification of Nanoscale Spin Waves as an Engagement and Research Tool
Santa Pile, Oleg Lesota, Silvan David Peter, Christina Humer, Martin Gasser
https://arxiv.org/abs/2405.03506

Spin-Wave Voices: Sonification of Nanoscale Spin Waves as an Engagement and Research Tool
Magnonics is an emerging research field that addresses the use of spin waves (magnons), purely magnetic waves, for information transport and processing. Spin waves are a potential replacement for electric current in modern computational devices that would make them more compact and energy efficient. The field is yet little known, even among physicists. Additionally, with the development of new measuring techniques and computational physics, the obtained magnetic data becomes more complex, in so…

On a $\mathbb{Z}_3$-valued discrete topological term in 10d heterotic string theories
Yuji Tachikawa, Hao Y. Zhang
https://arxiv.org/abs/2403.08861 https:/…

On a $\mathbb{Z}_3$-valued discrete topological term in 10d heterotic string theories
We show that the low-energy effective actions of two ten-dimensional supersymmetric heterotic strings are different by a $\mathbb{Z}_3$-valued discrete topological term even after we turn off the $E_8\times E_8$ and $Spin(32)/\mathbb{Z}_2$ gauge fields. This will be demonstrated by considering the inflow of normal bundle anomaly to the respective NS5-branes from the bulk. We also find that the $Spin(16)\times Spin(16)$ non-tachyonic non-supersymmetric heterotic string has the same non-zero $\ma…

This https://arxiv.org/abs/2308.06183 has been replaced.
initial toot: https://mastoxiv.page/@a…

Observation of broadening Rashba-type band in Au2Sb surface alloy
Here, we report a novel AuSb 2D superstructure on Au(111) that shows agreements and discrepancies to the expected electronic features of the ideal 2D surface alloys with $\sqrt{3}\times\sqrt{3}$ periodicity. Using spin- and angle-resolved photoemission spectroscopy, we find a significant spin splitting of the alloy bands with antiparallel spin polarization. The band structure originates from the hybridization between the Sb and the Au orbitals at the 2D Sb-Au interface. Taking advantage of the …

Giant asymmetric proximity-induced spin-orbit coupling in twisted graphene/SnTe heterostructure
Marko Milivojevi\'c, Martin Gmitra, Marcin Kurpas, Ivan \v{S}tich, Jaroslav Fabian
https://arxiv.org/abs/2402.09045

Giant asymmetric proximity-induced spin-orbit coupling in twisted graphene/SnTe heterostructure
We analyze the spin-orbit coupling effects in a three-degree twisted bilayer heterostructure made of graphene and an in-plane ferroelectric SnTe, with the goal of transferring the spin-orbit coupling from SnTe to graphene, via the proximity effect. Our results indicate that the point-symmetry breaking due to the incompatible mutual symmetry of the twisted monolayers and a strong hybridization has a massive impact on the spin splitting in graphene close to the Dirac point, with the spin splittin…

Effect of torsion in long-baseline neutrino oscillation experiments
Papia Panda, Dinesh Kumar Singha, Monojit Ghosh, Rukmani Mohanta
https://arxiv.org/abs/2403.09105

Effect of torsion in long-baseline neutrino oscillation experiments
In this work we investigate the effect of curved spacetime on neutrino oscillation. In a curved spacetime, the effect of curvature on fermionic fields is represented by spin connection. The spin connection consists of a non-universal ``contorsion" part which is expressed in terms of vector and axial current density of fermions. The contraction of contorsion part with the tetrad fields, which connects the internal flat space metric and the spacetime metric, is called torsion. In a scenario where…

This https://arxiv.org/abs/2310.12410 has been replaced.
initial toot: https://mastoxiv.page/@…

Crossover from string to cluster dynamics following a field quench in spin ice
We investigate quench dynamics of spin ice after removal of a strong magnetic field along the [100] crystal direction, using Monte Carlo simulations and theoretical arguments. We show how the early-time relaxation of the magnetization can be understood in terms of nucleation and growth of strings of flipped spins, in agreement with an effective stochastic model that we introduce and solve analytically. We demonstrate a crossover at longer times to a regime dominated by approximately isotropic c…

This https://arxiv.org/abs/2402.12951 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

On pole-skipping with gauge-invariant variables in holographic axion theories
We study the pole-skipping phenomenon within holographic axion theories, a common framework for studying strongly coupled systems with chemical potential ($μ$) and momentum relaxation ($β$). Considering the backreaction characterized by $μ$ and $β$, we encounter coupled equations of motion for the metric, gauge, and axion field, which are classified into spin-0, spin-1, and spin-2 channels. Employing gauge-invariant variables, we systematically address these equations and explore pole-skipp…

Spin-resolved nonlocal transport in proximitized Rashba nanowires
Pawe{\l} Szumniak, Daniel Loss, Jelena Klinovaja
https://arxiv.org/abs/2404.08527 https:/…

Spin-resolved nonlocal transport in proximitized Rashba nanowires
Non-equilibrium transport in hybrid semiconductor-superconductor nanowires is crucial for many quantum phenomena such as generating entangled states via cross Andreev reflection (CAR) processes, detecting topological superconductivity, reading out Andreev spin qubits, coupling spin qubits over long distances and so on. Here, we investigate numerically transport properties of a proximitized Rashba nanowire that hosts spin-polarized low-energy quasiparticle states. We show that the spin polarizat…

The fundamental plane of blazars based on the black hole spin-mass energy
Xu Zhang, Dingrong Xiong, Quangui Gao, Guiqin Yang, Fangwu Lu, Weiwei Na, Longhua Qin
https://arxiv.org/abs/2403.09088

The fundamental plane of blazars based on the black hole spin-mass energy
We examine the fundamental plane of 91 Blazars which include FSRQs and BL Lacs with known X-ray luminosity ($L_{R}$), radio luminosity ($L_X$), and black hole mass measurements ($M$) to reflect the relationship between jet and accretion for blazars. The fundamental plane of Blazars are log$L_{R}$=${0.273}_{+0.059}^{-0.059}$log$L_X$+${0.695}_{+0.191}^{-0.191}$log$M$+${25.457}_{+2.728}^{-2.728}$ and log$L_{R}$=${0.190}_{+0.049}^{-0.049}$log$L_X$+${0.475}_{+0.157}^{-0.157}$log$M$+${28.568}_{+2.245…

A Monte Carlo algorithm for spin foam intertwiners
Sebastian Steinhaus
https://arxiv.org/abs/2403.04836 https://arxiv.org/pdf/2403.04…

A Monte Carlo algorithm for spin foam intertwiners
Monte Carlo algorithms are barely considered in spin foam quantum gravity. Due to the quantum nature of spin foam amplitudes one cannot readily apply them, and the present sign problem is a threat to convergence and thus efficiency. Yet, ultimately the severity of the sign problem in spin foams is not known. In this article we propose a new probability distribution for coherent (boundary) intertwiners, which we use to define a Markov Chain Monte Carlo algorithm. We apply this algorithm to the S…

This https://arxiv.org/abs/2307.15093 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Berry phase of spin-one system in a rotating electric field
We consider in sufficient detail how the Berry phase arises in a rotating electric field in a model system with spin one. The goal is to help the student who first encountered this interesting problem, which is fraught with some subtleties that require attention in order not to go astray.

This https://arxiv.org/abs/2110.06503 has been replaced.
link: https://scholar.google.com/scholar?q=a

Electric-field control of magnetic anisotropies: applications to Kitaev spin liquids and topological spin textures
Magnetic anisotropies often originate from the spin-orbit coupling and determine magnetic ordering patterns. We develop a microscopic theory for DC electric-field controls of magnetic anisotropies in magnetic Mott insulators and discuss its applications to Kitaev materials and topological spin textures. Throughout this paper, we take a microscopic approach based on Hubbard-like lattice models, tight-binding models with on-site interactions. We derive a low-energy spin Hamiltonian from a fourth-…

Frustrated Quantum Magnetism on Complex Networks: What Sets the Total Spin
Preethi G, Shovan Dutta
https://arxiv.org/abs/2403.09116 https://

Frustrated Quantum Magnetism on Complex Networks: What Sets the Total Spin
Consider equal antiferromagnetic Heisenberg interactions between qubits sitting at the nodes of a complex, nonbipartite network. We ask the question: How does the network topology determine the net magnetization of the ground state and to what extent is it tunable? By examining various network families with tunable properties, we demonstrate that (i) graph heterogeneity, i.e., spread in the number of neighbors, is essential for a nonzero total spin, and (ii) other than the average number of nei…

On the equivalence between n-state spin and vertex models on the square lattice
M. J. Martins
https://arxiv.org/abs/2405.07341 https://

De spin dokters zijn aan het werk gezet"Nieuwe verkiezingen, waar niemand overigens voor pleit, zou puur theoretisch gezien ook niets uitmaken. "Dan kom je gewoon weer op dezelfde partijen uit", zegt een coalitiebron met een blik op de peilingen"
http…

PVV, VVD, NSC en BBB laten formatie niet meer klappen: 'Er is geen alternatief'
Even zat er een kink in de kabel in de onderhandelingen van PVV, VVD, NSC en BBB. Ook werd zichtbaar hoe verschillend ze denken over belangrijke onderwerpen. Tegelijkertijd vinden de partijen dat deze formatiepoging móét slagen. Er is geen alternatief.

This https://arxiv.org/abs/2306.09677 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Macroscopic Bell state between a millimeter-sized spin system and a superconducting qubit
Entanglement is a fundamental property in quantum mechanics that systems share inseparable quantum correlation regardless of their mutual distances. Owing to the fundamental significance and versatile applications, the generation of quantum entanglement between {\it macroscopic} systems has been a focus of current research. Here we report on the deterministic generation and tomography of the macroscopically entangled Bell state in a hybrid quantum system containing a millimeter-sized spin syste…

Spin-Wave Voices: Sonification of Nanoscale Spin Waves as an Engagement and Research Tool
Santa Pile, Oleg Lesota, Silvan David Peter, Christina Humer, Martin Gasser
https://arxiv.org/abs/2405.03506

Spin-Wave Voices: Sonification of Nanoscale Spin Waves as an Engagement and Research Tool
Magnonics is an emerging research field that addresses the use of spin waves (magnons), purely magnetic waves, for information transport and processing. Spin waves are a potential replacement for electric current in modern computational devices that would make them more compact and energy efficient. The field is yet little known, even among physicists. Additionally, with the development of new measuring techniques and computational physics, the obtained magnetic data becomes more complex, in so…

Rapid spin changes around a magnetar fast radio burst
Chin-Ping Hu, Takuto Narita, Teruaki Enoto, George Younes, Zorawar Wadiasingh, Matthew G. Baring, Wynn C. G. Ho, Sebastien Guillot, Paul S. Ray, Tolga Guver, Kaustubh Rajwade, Zaven Arzoumanian, Chryssa Kouveliotou, Alice K. Harding, Keith C. Gendreau
https://arxiv.org/abs/24…

Rapid spin changes around a magnetar fast radio burst
Magnetars are neutron stars with extremely high magnetic fields that exhibit various X-ray phenomena such as sporadic sub-second bursts, long-term persistent flux enhancements, and variable rates of rotation period change. In 2020, a fast radio burst (FRB), akin to cosmological millisecond-duration radio bursts, was detected from the Galactic magnetar SGR 1935+2154, confirming the long-suspected association between some FRBs and magnetars. However, the mechanism for FRB generation in magnetars …

This https://arxiv.org/abs/2309.04126 has been replaced.
initial toot: https://mastoxiv.page/@a…

Hyperfine spectroscopy and fast, all-optical arbitrary state initialization and readout of a single, ten-level ${}^{73}$Ge vacancy nuclear spin qudit in diamond
A high-spin nucleus coupled to a color center can act as a long-lived memory qudit in a spin-photon interface. The germanium vacancy (GeV) in diamond has attracted recent attention due to its excellent spectral properties and provides access to the ten-dimensional Hilbert space of the $I=9/2$ ${}^{73}$Ge nucleus. Here, we observe the ${}^{73}$GeV hyperfine structure, perform nuclear spin readout, and optically initialize the ${}^{73}$Ge spin into any eigenstate on a $μ$s timescale and with a f…

Superexchange Mechanism in Coupled Triangulenes Forming Spin-1 Chains
Yasser Saleem, Torben Steenbock, Emha Riyadhul Jinan Alhadi, Weronika Pasek, Gabriel Bester, Pawel Potasz
https://arxiv.org/abs/2403.07774

Superexchange Mechanism in Coupled Triangulenes Forming Spin-1 Chains
We show that the origin of the antiferromagnetic coupling in spin-1 triangulene chains, which were recently synthesized and measured by Mishra et al. Nature 598, 287-292 (2021) originates from a superexchange mechanism. This process, mediated by inter-triangulene states, opens the possibility to control parameters in the effective bilinear-biquadratic spin model. We start from the derivation of an effective tight-binding model for triangulene chains using a combination of tight-binding and Hart…

This https://arxiv.org/abs/2306.09149 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Robust gates with spin-locked superconducting qubits
Dynamical decoupling is effective in reducing gate errors in most quantum computation platforms and is therefore projected to play an essential role in future fault-tolerant constructions. In superconducting circuits, however, it has proven difficult to utilize the benefits of dynamical decoupling. In this work, we present a theoretical proposal that incorporates a continuous version of dynamical decoupling, namely spin locking, with a coupler-based CZ gate for transmons and provide analytical …

Frustrated Quantum Magnetism on Complex Networks: What Sets the Total Spin
Preethi G, Shovan Dutta
https://arxiv.org/abs/2403.09116 https://

Frustrated Quantum Magnetism on Complex Networks: What Sets the Total Spin
Consider equal antiferromagnetic Heisenberg interactions between qubits sitting at the nodes of a complex, nonbipartite network. We ask the question: How does the network topology determine the net magnetization of the ground state and to what extent is it tunable? By examining various network families with tunable properties, we demonstrate that (i) graph heterogeneity, i.e., spread in the number of neighbors, is essential for a nonzero total spin, and (ii) other than the average number of nei…

De spin dokters zijn aan het werk gezet"Nieuwe verkiezingen, waar niemand overigens voor pleit, zou puur theoretisch gezien ook niets uitmaken. "Dan kom je gewoon weer op dezelfde partijen uit", zegt een coalitiebron met een blik op de peilingen"
http…

PVV, VVD, NSC en BBB laten formatie niet meer klappen: 'Er is geen alternatief'
Even zat er een kink in de kabel in de onderhandelingen van PVV, VVD, NSC en BBB. Ook werd zichtbaar hoe verschillend ze denken over belangrijke onderwerpen. Tegelijkertijd vinden de partijen dat deze formatiepoging móét slagen. Er is geen alternatief.

Rapid spin changes around a magnetar fast radio burst
Chin-Ping Hu, Takuto Narita, Teruaki Enoto, George Younes, Zorawar Wadiasingh, Matthew G. Baring, Wynn C. G. Ho, Sebastien Guillot, Paul S. Ray, Tolga Guver, Kaustubh Rajwade, Zaven Arzoumanian, Chryssa Kouveliotou, Alice K. Harding, Keith C. Gendreau
https://arxiv.org/abs/24…

Rapid spin changes around a magnetar fast radio burst
Magnetars are neutron stars with extremely high magnetic fields that exhibit various X-ray phenomena such as sporadic sub-second bursts, long-term persistent flux enhancements, and variable rates of rotation period change. In 2020, a fast radio burst (FRB), akin to cosmological millisecond-duration radio bursts, was detected from the Galactic magnetar SGR 1935+2154, confirming the long-suspected association between some FRBs and magnetars. However, the mechanism for FRB generation in magnetars …

Inelastic neutron scattering and muon spin relaxation investigations of the deuterated Kondo lattices CeNiSnD$ _x $
X. Y. Zheng, D. T. Adroja, B. Chevalier, Z. Y. Shan, A. D. Hillier, H. Q. Yuan, M. Smidman
https://arxiv.org/abs/2403.09424

Inelastic neutron scattering and muon spin relaxation investigations of the deuterated Kondo lattices CeNiSnD$ _x $
CeNiSn is a Kondo semimetal where a gap opens at low temperatures due to hybridization between 4$f$ and conduction electrons, but a full insulating state fails to develop. Upon the insertion of hydrogen, long range magnetic order is induced. Here we report zero-field muon-spin relaxation and inelastic neutron scattering measurements of polycrystalline samples of the deuterides CeNiSnD$_x$ ($x$=1.0, 1.8). The muon-spin relaxation results confirm magnetic ordering in the whole sample of CeNiSnD b…

Probing spontaneously symmetry-broken phases with spin-charge separation through noise correlation measurements
Javier Arg\"uello-Luengo, Sergi Juli\`a-Farr\'e, Maciej Lewenstein, Christof Weitenberg, Luca Barbiero
https://arxiv.org/abs/2404.08374

Probing spontaneously symmetry-broken phases with spin-charge separation through noise correlation measurements
Spontaneously symmetry-broken (SSB) phases are locally ordered states of matter characterizing a large variety of physical systems. Because of their specific ordering, their presence is usually witnessed by means of local order parameters. Here, we propose an alternative approach based on statistical correlations of noise after the ballistic expansion of an atomic cloud. We indeed demonstrate that probing such noise correlators allows one to discriminate among different SSB phases characterized…

This https://arxiv.org/abs/2403.07061 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Simulating Meson Scattering on Spin Quantum Simulators
Studying high-energy collisions of composite particles, such as hadrons and nuclei, is an outstanding goal for quantum simulators. However, preparation of hadronic wave packets has posed a significant challenge, due to the complexity of hadrons and the precise structure of wave packets. This has limited demonstrations of hadron scattering on quantum simulators to date. Observations of confinement and composite excitations in quantum spin systems have opened up the possibility to explore scatter…

Impact of spin-entropy on the thermoelectric properties of a 2D magnet
Alessandra Canetta, Serhii Volosheniuk, Sayooj Satheesh, Jos\'e Pedro Alvarinhas Batista, Alo\"is Castellano, Riccardo Conte, Daniel G. Chica, Kenji Watanabe, Takashi Taniguchi, Xavier Roy, Herre S. J. van der Zant, Marko Burghard, Matthieu J. Verstraete, Pascal Gehring
h…

Impact of spin-entropy on the thermoelectric properties of a 2D magnet
Heat-to-charge conversion efficiency of thermoelectric materials is closely linked to the entropy per charge carrier. Thus, magnetic materials are promising building blocks for highly efficient energy harvesters, as their carrier entropy is boosted by a spin degree of freedom. In this work, we investigate how this spin entropy impacts heat-to-charge conversion in A-type antiferromagnet CrSBr. We perform simultaneous measurements of electrical conductance and thermocurrent while changing magneti…

Superexchange Mechanism in Coupled Triangulenes Forming Spin-1 Chains
Yasser Saleem, Torben Steenbock, Emha Riyadhul Jinan Alhadi, Weronika Pasek, Gabriel Bester, Pawel Potasz
https://arxiv.org/abs/2403.07774

Superexchange Mechanism in Coupled Triangulenes Forming Spin-1 Chains
We show that the origin of the antiferromagnetic coupling in spin-1 triangulene chains, which were recently synthesized and measured by Mishra et al. Nature 598, 287-292 (2021) originates from a superexchange mechanism. This process, mediated by inter-triangulene states, opens the possibility to control parameters in the effective bilinear-biquadratic spin model. We start from the derivation of an effective tight-binding model for triangulene chains using a combination of tight-binding and Hart…

Analytical model of precessing binaries using post-Newtonian theory in the extreme mass-ratio limit I: General Formalism
Nicholas Loutrel, Sajal Mukherjee, Andrea Maselli, Paolo Pani
https://arxiv.org/abs/2402.08883

Analytical model of precessing binaries using post-Newtonian theory in the extreme mass-ratio limit I: General Formalism
We develop a fully analytical waveform model for precessing binaries with arbitrary spin vectors using post-Newtonian theory in the extreme mass-ratio limit and a hierarchical multi-scale analysis. Although the post-Newtonian series poorly converges in this limit, our results can be used to estimate how precession affects the measurability of certain binary parameters, and to inform and compare with other waveform approximants, such as effective-one-body models, hybrid waveforms, and self-force…

Solar neutrinos and leptonic spin forces
Saeed Ansarifard, M. C. Gonzalez-Garcia, Michele Maltoni, Joao Paulo Pinheiro
https://arxiv.org/abs/2405.05340 htt…

Solar neutrinos and leptonic spin forces
We quantify the effects on the evolution of solar neutrinos of light spin-zero particles with pseudoscalar couplings to leptons and scalar couplings to nucleons. In this scenario the matter potential sourced by the nucleons in the Sun's matter gives rise to spin precession of the relativistic neutrino ensemble. As such the effects in the solar observables are different if neutrinos are Dirac or Majorana particles. For Dirac neutrinos the spin-flavour precession results into left-handed neutrino…

This https://arxiv.org/abs/2301.03997 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

A Q-operator for open spin chains II: boundary factorization
One of the features of Baxter's Q-operators for many closed spin chain models is that all transfer matrices arise as products of two Q-operators with shifts in the spectral parameter. In the representation-theoretical approach to Q-operators, underlying this is a factorization formula for L-operators (solutions of the Yang-Baxter equation associated to particular infinite-dimensional representations). To have such a formalism to open spin chains, one needs a factorization identity for solutions…

This https://arxiv.org/abs/2311.04560 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Fast Generation of GHZ-like States Using Collective-Spin XYZ Model
The Greenberger-Horne-Zeilinger (GHZ) state is a key resource for quantum information processing and quantum metrology. The atomic GHZ state can be generated by one-axis twisting (OAT) interaction $H_{\mathrm{OAT}}=χJ_{z}^{2}$ with $χ$ the interaction strength, but it requires a long evolution time $χt=π/2$ and is thus seriously influenced by decoherence and losses. Here we propose a three-body collective-spin XYZ model which creates a GHZ-like state in a very short timescale $χt\sim \ln {…

Ultra-high spin emission from antiferromagnetic FeRh
Dominik Hamara, Mara Strungaru, Jamie Massey, Quentin Remy, Guillermo Nava Antonio, Obed Alves Santos, Michel Hehn, Richard F. L. Evans, Roy W. Chantrell, St\'ephane Mangin, Christopher H. Marrows, Joseph Barker, Chiara Ciccarelli
https://arxiv.org/abs/2404.07841

Ultra-high spin emission from antiferromagnetic FeRh
An antiferromagnet emits spin currents when time-reversal symmetry is broken. This is typically achieved by applying an external magnetic field below and above the spin-flop transition or by optical pumping. In this work we apply optical pump-THz emission spectroscopy to study picosecond spin pumping from metallic FeRh as a function of temperature. Intriguingly we find that in the low-temperature antiferromagnetic phase the laser pulse induces a large and coherent spin pumping, while not crossi…

A Spin model for global flat-foldability of random origami
Chihiro Nakajima
https://arxiv.org/abs/2403.07306 https://arxiv.org/pdf/24…

A Spin model for global flat-foldability of random origami
We map the problem of determining flat-foldability of the origami diagram onto the ground-state search problem of spin glass model on random graphs. If the origami diagram is locally flat-foldable around each vertex, a pre-folded diagram, showing the planar-positional relationship of the facet, can be obtained. For remaining combinatorial problem on layer ordering of facets can be described as a spin model. A spin variable is assigned for the layer-ordering of each pair of facets which have an …

Eccentricity matters: Impact of eccentricity on inferred binary black hole populations
Muhammad Zeeshan, Richard O'Shaughnessy
https://arxiv.org/abs/2404.08185

Eccentricity matters: Impact of eccentricity on inferred binary black hole populations
Gravitational waves (GW), emanating from binary black holes (BBH), encode vital information about their source. GW signals enable us to deduce key properties of the BBH population across the universe, including mass, spin, and eccentricity distribution. While the masses and spins of binary components are already recognized for their insights into formation, eccentricity stands out as a distinct and quantifiable indicator of formation and evolution. Yet, despite its significance, eccentricity is…

Memory in a sequence of weak and short duration measurements of non-commuting observables
Sophia M. Walls, Ian J. Ford
https://arxiv.org/abs/2402.08737 htt…

Memory in a sequence of weak and short duration measurements of non-commuting observables
Sequential projective measurements of non-commuting observables destroy information about previous measurement outcomes, but weak measurements conducted over short durations do not cause as much disturbance to the system, and as a result, memory of previous outcomes may not be entirely eliminated. We use Quantum State Diffusion to unravel a Lindblad equation, generating numerical, stochastic trajectories for a spin 1/2 system and a system of two entangled spin 1/2 subsystems, each undergoing a …

Hybrid magnon-phonon cavity for large-amplitude terahertz spin-wave excitation
Shihao Zhuang, Xufeng Zhang, Yujie Zhu, Nian X. Sun, Chang-Beom Eom, Paul G. Evans, Jia-Mian Hu
https://arxiv.org/abs/2403.08186

Hybrid magnon-phonon cavity for large-amplitude terahertz spin-wave excitation
Terahertz (THz) spin waves or their quanta, magnons, can be efficiently excited by acoustic phonons because these excitations have similar wavevectors in the THz regime. THz acoustic phonons can be produced using photoacoustic phenomena but typically have a low population and thus a relatively low displacement amplitude. The magnetization amplitude and population of the acoustically excited THz magnons are thus usually small. Using analytical calculations and dynamical phase-field simulations, …

This https://arxiv.org/abs/2311.10535 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Magnetic field-induced phases and spin Hamiltonian in Cs2CoBr4
Magnetic structures and spin excitations are studied across the phase diagram of the geometrically frustrated S = 3/2 quantum antiferromagnet Cs2CoBr4 in magnetic fields applied along the magnetic easy axis, using neutron diffraction, inelastic neutron scattering and THz absorption spectroscopy. The data are analyzed, where appropriate, using extended SU (4) linear spin wave theory. A minimal magnetic Hamiltonian is proposed based on measurements in the high field polarized state. It deviates c…

Compton scattering from superstrings
Thales Azevedo, Daniel E. A. Matamoros, Gabriel Menezes
https://arxiv.org/abs/2403.08899 https://

Compton scattering from superstrings
We propose a candidate Compton amplitude which is valid for any (integer) quantum spin and free from any spurious poles. We consider the cases of electromagnetism and gravity. We obtain such amplitudes by calculating the corresponding ones from superstring theory involving states on the leading Regge trajectory. To extract the associated field-theory amplitudes a few considerations in the form of simple physical constraints are required, such as: Soft momentum transfer, compactification of pola…

Topological Optical Spin Injection Beyond Regular Weyl semimetals
Suvendu Ghosh, Chuanchang Zeng, A. Taraphder, Snehasish Nandy
https://arxiv.org/abs/2403.09235

Topological Optical Spin Injection Beyond Regular Weyl semimetals
Photoinduced effects are now reckoned to be important tools to reveal a rich gamut of entrancing physics in topological materials, which are normally inaccessible via conventional probes. Here we investigate one of these intriguing effects, namely, {\it optical spin injection} (OSI) beyond the regular Weyl semimetal (WSM), specifically in multi- and higher-order WSMs. Remarkably, we demonstrate that OSI in multi-WSMs can emerge as a frequency-independent quantized response engendered by band li…

Simulating Meson Scattering on Spin Quantum Simulators
Elizabeth R. Bennewitz, Brayden Ware, Alexander Schuckert, Alessio Lerose, Federica M. Surace, Ron Belyansky, William Morong, De Luo, Arinjoy De, Kate S. Collins, Or Katz, Christopher Monroe, Zohreh Davoudi, Alexey V. Gorhskov
https://arxiv.org/abs/2403.07061

Simulating Meson Scattering on Spin Quantum Simulators
Studying high-energy collisions of composite particles, such as hadrons and nuclei, is an outstanding goal for quantum simulators. However, preparation of hadronic wave packets has posed a significant challenge, due to the complexity of hadrons and the precise structure of wave packets. This has limited demonstrations of hadron scattering on quantum simulators to date. Observations of confinement and composite excitations in quantum spin systems have opened up the possibility to explore scatter…

Field-orientation-dependent magnetic phases in GdRu$_2$Si$_2$ probed with muon-spin spectroscopy
B. M. Huddart, A. Hern\'andez-Meli\'an, G. D. A. Wood, D. A. Mayoh, M. Gomil\v{s}ek, Z. Guguchia, C. Wang, S. J. Blundell, G. Balakrishnan, T. Lancaster
https://arxiv.org/abs/2403.09431…

Field-orientation-dependent magnetic phases in GdRu$_2$Si$_2$ probed with muon-spin spectroscopy
Centrosymmetric GdRu$_2$Si$_2$ exhibits a variety of multi-Q magnetic states as a function of temperature and applied magnetic field, including a square skyrmion-lattice phase. The material's behavior is strongly dependent on the direction of the applied field, with different phase diagrams resulting for fields applied parallel or perpendicular to the crystallographic $c$ axis. Here, we present the results of muon-spin relaxation ($μ^+$SR) measurements on single crystals of GdRu$_2$Si$_2$. Our…

Chiral gauge field in fully-spin polarized Weyl semimetal with magnetic domain walls
Akihiro Ozawa, Yasufumi Araki, Kentaro Nomura
https://arxiv.org/abs/2403.09535

Chiral gauge field in fully-spin polarized Weyl semimetal with magnetic domain walls
Modulation of magnetization in magnetic Weyl semimetals leads to the shift of Weyl points in momentum space, which effectively serves as the chirality-dependent gauge field for the Weyl fermions. Here, we theoretically study such a magnetization-induced chiral gauge field, in a fully spin-polarized Weyl ferromagnet $\rm{Co}_3\rm{Sn}_2\rm{S}_2$. From a tight-binding model of $\rm{Co}_3\rm{Sn}_2\rm{S}_2$ on stacked kagome lattice with magnetism, we calculate the magnetization-dependent evolution …

This https://arxiv.org/abs/2311.03690 has been replaced.
initial toot: https://mastoxiv.page/@a…

Nonvolatile spin field effect transistor based on VSi2N4/Sc2CO2 multiferroic heterostructure
In this study, we present first-principles calculations that introduce a novel nonvolatile spin field-effect transistor (Spin-FET) utilizing a van der Waals multiferroic heterostructure, specifically VSi2N4/Sc2CO2. We demonstrate that inverting the ferroelectric polarization in a Sc2CO2 monolayer can effectively modulate the electronic states of a VSi2N4 monolayer, enabling a transition from half-metal to half-semiconductor. This transition significantly alters the electronic transport properti…

This https://arxiv.org/abs/2404.07637 has been replaced.
initial toot: https://mastoxiv.page/@a…

Preservation of scalar spin chirality across a metallic spacer in synthetic antiferromagnets with chiral interlayer interactions
Chiral magnetic textures are highly attractive for the development of spintronic devices, due to their properties to store and transport information in an energy efficient manner. In multilayered systems, these are typically stabilized via the interfacial intralayer Dzyaloshinskii-Moriya interaction (DMI), which leads to configurations with both vector and scalar spin chirality. Additionally, it has been recently observed that DMI may also promote interlayer vector spin chirality, coupling spin…

This https://arxiv.org/abs/2312.04631 has been replaced.
initial toot: https://mastoxiv.page/@a…

Hole Flying Qubits in Quantum Dot Arrays
Quantum information transfer is fundamental for scalable quantum computing in any potential platform and architecture. Hole spin qubits, owing to their intrinsic spin-orbit interaction (SOI), promise fast quantum operations which are fundamental for the implementation of quantum gates. Yet, the influence of SOI in quantum transfer protocols remains an open question. Here, we investigate hole flying qubits using shortcuts to adiabaticity protocols, i.e., the long-range transfer of hole spin stat…

Topological responses from gapped Weyl points in 2D altermagnets
Kirill Parshukov, Raymond Wiedmann, Andreas P. Schnyder
https://arxiv.org/abs/2403.09520 h…

Topological responses from gapped Weyl points in 2D altermagnets
Altermagnetism combines aspects of both ferromagnetism and antiferromagnetism, breaking spin degeneracy while possessing no net magnetization. In this work, we study the symmetry requirements for topologically protected Weyl points in 2D altermagnets, involving bands with the same spin quantum number. We classify all spin-wallpaper groups whose symmetries protect 2D Weyl points and show that their nontrivial topology is charactrized by a quantized $π$-Berry phase. Representative electronic tig…

This https://arxiv.org/abs/2312.11677 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Krylov complexity for non-local spin chains
Building upon recent research in spin systems with non-local interactions, this study investigates operator growth using the Krylov complexity in different non-local versions of the Ising model. We find that the non-locality results in a faster scrambling of the operator to all sites. While the saturation value of Krylov complexity of local integrable and local chaotic theories differ by a significant margin, this difference is much suppressed when non-local terms are introduced in both regimes…

Impact of spin torques and spin pumping phenomena on magnon-plasmon polaritons in antiferromagnetic insulator-semiconductor heterostructures
Vemund Falch, Jeroen Danon, Alireza Qaiumzadeh, Arne Brataas
https://arxiv.org/abs/2403.06934

Impact of spin torques and spin pumping phenomena on magnon-plasmon polaritons in antiferromagnetic insulator-semiconductor heterostructures
We investigate the impact of spin torque and spin pumping on the surface magnon polariton dispersion in a antiferromagnetic insulator-semiconductor heterostructure. In the bilayer system, the surface magnon polaritons conventionally couple to the plasma-oscillations in the semiconductor via electromagnetic fields. Additionally, magnons in the antiferromagnetic insulator layer may interact with the semiconductor layer via spin torques and their reciprocal phenomena of spin pumping. Due to the sp…

This https://arxiv.org/abs/2401.01986 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Generation of complete graph states in a spin-$1/2$ Heisenberg chain with a globally optimized magnetic field
Graph states possess significant practical value in measurement-based quantum computation, with complete graph states that exhibit exceptional performance in quantum metrology. In this work, we introduce a method for generating multiparticle complete graph states using a spin-$1/2$ Heisenberg $XX$ chain subjected to a time-varying magnetic field, which applies to a wide range of systems. Our scheme relies exclusively on nearest-neighbor interactions between atoms, with real-time magnetic field …

Error correction of parity-encoding-based annealing through post-readout decoding
Yoshihiro Nambu
https://arxiv.org/abs/2402.08839 https://

Error correction of parity-encoding-based annealing through post-readout decoding
Lechner, Hauke, and Zoller proposed a parity-encoded spin-embedding scheme for quantum annealing (QA) with all-to-all connectivity to avoid the issue of limited connectivity in near-term QA hardware and to enable the implementation thereof using only geometrically local interactions between spins fabricated on the planar substrate. Nevertheless, the redundant encoding of logical information, i.e., using a large number of spins to embed the logical information, increases the computational cost a…

This https://arxiv.org/abs/2401.04465 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

High fidelity optical readout of a nuclear spin qubit in Silicon Carbide
Quantum state readout is a key requirement for a successful qubit platform. In this work we demonstrate a high fidelity quantum state readout of a V2 center nuclear spin based on a repetitive readout technique. We demonstrate up to 99.5$\,\%$ readout fidelity and 99$\,\%$ for state preparation. Using this efficient readout we initialise the nuclear spin by measurement and demonstrate its Rabi and Ramsey nutation. Finally, we use the nuclear spin as a long lived memory for quantum sensing applic…

Spin-spin interaction mediated by chiral phonons
Takehito Yokoyama
https://arxiv.org/abs/2405.08554 https://arxiv.org/pdf/2405.08554<…

Quantum Walks in Weak Stochastic Gauge Fields
Jan W\'ojcik
https://arxiv.org/abs/2402.09133 https://arxiv.org/pdf/2402.09133

Quantum Walks in Weak Stochastic Gauge Fields
The behaviour of random quantum walks is known to be diffusive. Here we study discrete time quantum walks in weak stochastic gauge fields. In the case of position and spin dependent gauge field, we observe a transition from ballistic to diffusive motion, with the probability distribution becoming Gaussian. However, in contradiction to common belief, weak stochastic electric gauge fields reveal the persistence of Bloch oscillations despite decoherence which we demonstrate on simulations and prov…

Monte Carlo Spin Simulations of Magnetic Noise -- The Search for Pivoting
D. L. Mickelsen, Ruqian Wu, Clare C. Yu
https://arxiv.org/abs/2403.09078 https://…

Monte Carlo Spin Simulations of Magnetic Noise -- The Search for Pivoting
Superconducting quantum interference devices (SQUIDs) show great promise as quantum bits (qubits) but continue to be hindered by flux noise. The flux noise power spectra of SQUIDs go as $1/f^α$, where $α$ is the temperature-dependent noise exponent. Experiments find $0.5 \lesssim α\lesssim 1$. Furthermore, experiments find that the noise power spectra versus frequency at different temperatures pivot about or cross at a common point for each SQUID. To try to better understand the results and …

Random Matrix Theory Approach to Quantum Fisher Information in Quantum Many-Body Systems
Venelin P. Pavlov, Yoana R. Chorbadzhiyska, Charlie Nation, Diego Porras, Peter A. Ivanov
https://arxiv.org/abs/2402.09029

Random Matrix Theory Approach to Quantum Fisher Information in Quantum Many-Body Systems
We theoretically investigate parameter quantum estimation in quantum chaotic systems. Our analysis is based on an effective description of non-integrable quantum systems in terms of a random matrix Hamiltonian. Based on this approach we derive an analytical expression for the time evolution of the quantum Fisher information. We test our random matrix theory prediction with the exact diagonalization of a non-integrable spin system, focusing on the estimation of a local magnetic field by measurem…

This https://arxiv.org/abs/2306.11240 has been replaced.
initial toot: https://mastoxiv.page/@a…

Spin-orbit interaction enabled electronic Raman scattering from charge collective modes
Electronic Raman scattering in the fully symmetric channel couples to the charge excitations in the system, including the plasmons. However, the plasmon response has a spectral weight of $\sim q^2$, where $q$, the momentum transferred by light, is small. In this work, we show that in inversion symmetry broken systems where Rashba type spin-orbit coupling affects the states at the Fermi energy (which is a known low energy effect) as well as the transition elements to other states (a high energy …

This https://arxiv.org/abs/2309.02178 has been replaced.
initial toot: https://mastoxiv.page/@a…

Superconductivity from spin fluctuations and long-range interactions in magic-angle twisted bilayer graphene
Magic-angle twisted bilayer graphene (MATBG) has been extensively explored both theoretically and experimentally as a suitable platform for a rich and tunable phase diagram that includes ferromagnetism, charge order, broken symmetries, and unconventional superconductivity. In this work, we investigate the intricate interplay between long-range electron-electron interactions, spin fluctuations, and superconductivity in MATBG. By employing a low-energy model for MATBG that captures the correct sh…

This https://arxiv.org/abs/2402.04719 has been replaced.
link: https://scholar.google.com/scholar?q=a

Quantum Theory of Spin-Transfer and Spin-Pumping in Collinear Antiferromagnets and Ferrimagnets
Antiferromagnets are promising candidates as active components in spintronic applications. They share features with ferrimagnets in that opposing spin orientations exist in two or more sublattices. Spin transfer torque and spin pumping are essential ingredients in antiferromagnetic and ferrimagnet spintronics. This paper develops an out-of-equilibrium quantum theory of the spin dynamics of collinear magnets containing many spins coupled to normal metal reservoirs. At equilibrium, the spins are …

Ultra-long relaxation of a Kramers qubit formed in a bilayer graphene quantum dot
Artem O. Denisov, Veronika Reckova, Solenn Cances, Max J. Ruckriegel, Michele Masseroni, Christoph Adam, Chuyao Tong, Jonas D. Gerber, Wei Wister Huang, Kenji Watanabe, Takashi Taniguchi, Thomas Ihn, Klaus Ensslin, Hadrien Duprez
https://arxiv.org/…

Ultra-long relaxation of a Kramers qubit formed in a bilayer graphene quantum dot
The intrinsic valley degree of freedom makes bilayer graphene a unique platform for emerging types of semiconducting qubits. The single-carrier quantum dot ground state exhibits a two-fold degeneracy where the two states have opposite spin and valley quantum numbers. By breaking the time-reversal symmetry of this ground state with an out-of-plane magnetic field, a novel type of qubit (Kramers qubit), encoded in the two-dimensional spin-valley subspace, becomes accessible. The Kramers qubit is r…