Tootfinder

Treefera, which uses satellite imagery, drone imagery, and AI to provide real-time insights into supply chains, raised a $30M Series B led by Notion Capital (Cate Lawrence/Tech.eu)
https://tech.eu/2025/06/03/treefera-secure…

Treefera secures $20M Series B for AI-driven supply chain resilience solutions
Supply chain resilience startup Treeferachas secured $20 million in its Series B funding round, led by Notion Capital with participation from other investors.  In the face of growing economic uncertainty, a stringent regulatory landscape, and increasing environmental risk, Treefera’s platform utilises satellite imagery, drone imagery, and adaptive AI in order to provide real-time, tailored insights into supply chains.  This is especially significant within the first mile of supply chains,…

🇺🇦 #NowPlaying on KEXP's #AfternoonShow
Alice in Chains:
🎵 Got Me Wrong
#AliceinChains
https://stepperistrever.bandcamp.com/track/got-me-wrong-alice-in-chains
https://open.spotify.com/track/2lBqGHtGLD5FGeJJYNKbGS

Dimerization in $O(n)$-invariant quantum spin chains
J. E. Bj\"ornberg, K. Ryan
https://arxiv.org/abs/2506.06103 https://arxiv.o…

Dimerization in $O(n)$-invariant quantum spin chains
We establish dimerization in $O(n)$-invariant quantum spin chains with big enough $n$, in a large part of the phase diagram where this result is expected. This includes identifying two distinct ground states which are translations of one unit of eachother, and which both have exponentially decaying correlations. Our method relies on a probabilistic representation of the quantum system in terms of random loops, and an adaptation of a method developed for loop $O(n)$ models on the hexagonal latti…

Stable Tracking-in-the-Loop Control of Cable-Driven Surgical Manipulators under Erroneous Kinematic Chains
Neelay Joglekar, Fei Liu, Florian Richter, Michael C. Yip
https://arxiv.org/abs/2507.05663

Stable Tracking-in-the-Loop Control of Cable-Driven Surgical Manipulators under Erroneous Kinematic Chains
Remote Center of Motion (RCM) robotic manipulators have revolutionized Minimally Invasive Surgery, enabling precise, dexterous surgical manipulation within the patient's body cavity without disturbing the insertion point on the patient. Accurate RCM tool control is vital for incorporating autonomous subtasks like suturing, blood suction, and tumor resection into robotic surgical procedures, reducing surgeon fatigue and improving patient outcomes. However, these cable-driven systems are subject …

The return of web rings.
https://serverless.industries/2025/05/27/webring.en.html

Fermion parity switches imprinted in the photonic field of cavity embedded Kitaev chains
Victor Fernandez Becerra, Olesia Dmytruk
https://arxiv.org/abs/2506.06237

Fermion parity switches imprinted in the photonic field of cavity embedded Kitaev chains
The entanglement of electronic states with quantum light in cavity embedded systems has opened new avenues to manipulate quantum materials. In this work we investigate the Kitaev chain coupled to a single mode photonic cavity. Using exact diagonalization we calculate the many-body energy spectrum of the electron-photon Hamiltonian in finite-length chains. We find two distinct types of ground states, one with a well defined parity and another with an alternating parity where a doubly degenerate …

Typical #DougFord. I swear he's a shit at everything as #Trump.
The LCBO and Beer Store systems were working _perfectly_.. and making the province gobs of cash, AND reusing/diverting all that waste.
Already shuttered LCBO and TBS locations because of other retailers and now your recycling infra is ha…

"Copper is used in everything from electrical wiring and building construction to cars, phones, and industrial machinery. A tariff like the one proposed by Trump could ripple through supply chains, driving up prices for companies and consumers alike."
Copper price hits record high after Trump floats 50% tariff
https://qz.com/copper-record-price-trump-50-percent-tariff

Modelling and Systematics of $\tfrac{1}{2}[521]\,\nu$ Quasiparticle Rotational Bands in $N = 99,\;101,\;103$ Isotonic Chains
Pinky, Sushil Kumar, Sukhjeet Singh, A. K. Jain
https://arxiv.org/abs/2508.05522

Modelling and Systematics of $\tfrac{1}{2}[521]\,ν$ Quasiparticle Rotational Bands in $N = 99,\;101,\;103$ Isotonic Chains
We analyze the $\tfrac{1}{2}[521]\,ν$ quasiparticle rotational bands along the $N = 99,\;101,\;103$ isotonic chains using semi-empirical model in which first and higher order Coriolis terms are treated perturbatively. A dedicated Python routine optimizes five parameters bandhead energy, inertia A, decoupling a, and Coriolis coefficients B and C for each nucleus. The calculations match experimental level spacings to within 5 keV. Staggering keeps a common phase across the three chains yet grows…

Dissipative response of driven bead-spring-dashpot chains
R. Kailasham
https://arxiv.org/abs/2507.05692 https://arxiv.org/pdf/2507.05…

Dissipative response of driven bead-spring-dashpot chains
The work dissipated in pulling a polymer chain with internal friction is numerically calculated by considering a sequence of $N$ bead-spring-dashpots tethered at one end and being pulled at the other using a harmonic trap via linear and symmetric protocols. The variation of the dissipation with the chain length, pulling trap stiffness, and the internal friction parameter are examined in detail for both the protocols. In the limit of high trap stiffness: (i) the dissipation $decreases$ with $N$ …

Random livestream jumpscare :neofox_think_woozy:
Come watch if you're bored or whatever idk I'm just gonna draw and yap by myself
https://twitch.tv/demirramon

Demirramon - Twitch
Animating | Chains of Fate - Good Evening Sun Sim - day 37

Matrix Rosenthal and Concentration Inequalities for Markov Chains with Applications in Statistical Learning
Yang Peng, Yuchen Xin, Zhihua Zhang
https://arxiv.org/abs/2508.04327 …

Matrix Rosenthal and Concentration Inequalities for Markov Chains with Applications in Statistical Learning
In this paper, we study moment and concentration inequalities of the spectral norm for sums of dependent random matrices. We establish novel Rosenthal-Burkholder inequalities for matrix martingales, as well as matrix Rosenthal, Hoeffding, and Bernstein inequalities for ergodic Markov chains. Compared with previous work on matrix concentration inequalities for Markov chains, our results do not require the assumptions of a non-zero absolute spectral gap and bounded matrix functions. Further…

Got slammed by an unidentified but certainly "#AI"-related #distributed #crawler this week, it drove one site's traffic to 10× average. Today I tired of playing Whac-a-Mole and blocked the two bigge…

Concurrent Skin-scale-free Localization and Criticality under M\"obius Boundary Conditions in a Non-Hermitian Ladder
Shu Long, Linhu Li
https://arxiv.org/abs/2507.05691

Concurrent Skin-scale-free Localization and Criticality under Möbius Boundary Conditions in a Non-Hermitian Ladder
Non-Hermitian systems possess exotic localization phenomena beyond their Hermitian counterparts, exhibiting massive accumulation of eigenstates at the system boundaries with different scaling behaviors. In this study, we investigate two weakly coupled non-Hermitian Hatano-Nelson chains under Möbius boundary conditions (MBCs), and reveal the coexistence of two distinct localization behaviors for eigenstates. Namely, eigenstates exhibit non-Hermitian skin effect in one chain and scale-free local…

Multi-Agent Reinforcement Learning for Dynamic Pricing in Supply Chains: Benchmarking Strategic Agent Behaviours under Realistically Simulated Market Conditions
Thomas Hazenberg, Yao Ma, Seyed Sahand Mohammadi Ziabari, Marijn van Rijswijk
https://arxiv.org/abs/2507.02698

Multi-Agent Reinforcement Learning for Dynamic Pricing in Supply Chains: Benchmarking Strategic Agent Behaviours under Realistically Simulated Market Conditions
This study investigates how Multi-Agent Reinforcement Learning (MARL) can improve dynamic pricing strategies in supply chains, particularly in contexts where traditional ERP systems rely on static, rule-based approaches that overlook strategic interactions among market actors. While recent research has applied reinforcement learning to pricing, most implementations remain single-agent and fail to model the interdependent nature of real-world supply chains. This study addresses that gap by evalu…

Rant done, and, yes, now I’m done for today, fed up with the endless noise and digital chains!

Towards a consistent Semiclassical Theory of Gravity
Francisco Pipa
https://arxiv.org/abs/2507.05237 https://arxiv.org/pdf/2507.05237…

Towards a consistent Semiclassical Theory of Gravity
We argue that semiclassical gravity can be rendered consistent by assuming that quantum systems only emit a gravitational field when they interact with a stable determination chain (SDCs), which are specific chains of interactions modeled via decoherence and test functions obeying a set of conditions. When systems are disconnected from SDCs, they do not emit a gravitational field. This denies the universality of gravity, while upholding a version of the equivalence principle. We argue that this…

Recourse, Repair, Reparation, & Prevention: A Stakeholder Analysis of AI Supply Chains
Aspen K. Hopkins, Isabella Struckman, Kevin Klyman, Susan S. Silbey
https://arxiv.org/abs/2507.02648

Recourse, Repair, Reparation, & Prevention: A Stakeholder Analysis of AI Supply Chains
The AI industry is exploding in popularity, with increasing attention to potential harms and unwanted consequences. In the current digital ecosystem, AI deployments are often the product of AI supply chains (AISC): networks of outsourced models, data, and tooling through which multiple entities contribute to AI development and distribution. AI supply chains lack the modularity, redundancies, or conventional supply chain practices that enable identification, isolation, and easy correction of fai…

Gevrey KAM equilibria for quasi-periodic long-range Frenkel-Kontorova models
Yujia An, Xifeng Su
https://arxiv.org/abs/2508.05147 https://arxiv.org/pdf/250…

Gevrey KAM equilibria for quasi-periodic long-range Frenkel-Kontorova models
We consider models of one-dimensional chains of non-nearest neighbor and many-body interacting particles subjected to quasi-periodic media. We extend the results in \cite{12Su&delaLlavelongrange} from analytic to Gevrey regularity potentials. More precisely, we establish an a posteriori KAM theorem showing that in the Gevrey topology, given an approximate solution of equilibrium equation, which satisfies some appropriate non-degeneracy conditions and decay property, then there is a true solutio…

Strategies for Resource Allocation of Two Competing Companies using Genetic Algorithm
Wing Keung Cheung, Kwok Yip Szeto
https://arxiv.org/abs/2507.02952 ht…

Strategies for Resource Allocation of Two Competing Companies using Genetic Algorithm
We investigate various strategic locations of shops in shopping malls in a metropolis with the aim of finding the best strategy for final dominance of market share by a company in a competing environment. The problem is posed in the context of two competing supermarket chains in a metropolis, described in the framework of the two-dimensional Ising model. Evolutionary Algorithm is used to encode the ensemble of initial configurations and Monte Carlo method is used to evolve the pattern. Numerica…

Replaced article(s) found for cond-mat.stat-mech. https://arxiv.org/list/cond-mat.stat-mech/new
[1/1]:
- Scaling of diffusion constants in perturbed easy-axis Heisenberg spin chains
Markus Kraft, Mariel Kempa, Jiaozi Wang, Sourav Nandy, Robin Steinigeweg

I'm live! Might be the last day I work on this animation :neofox_owo:

#Livestream

Demirramon - Twitch
Animating | Chains of Fate - Good Evening Sun Sim - day 42

Dimension-Preserving Saturated Embeddings of Finite Posets into the Spectra of Noetherian UFDs
David Baron, S. Loepp
https://arxiv.org/abs/2507.03574 https…

Dimension-Preserving Saturated Embeddings of Finite Posets into the Spectra of Noetherian UFDs
Given a finite poset $X$, we find necessary and sufficient conditions for there to exist a local Noetherian UFD $A$ and a saturated embedding of posets $ϕ: X \longrightarrow \mbox{Spec}(A)$ such that $\dim(X)=\dim(A)$. The conditions imposed on $X$ in our characterization are remarkably mild, demonstrating that there is a large class of finite posets that can be embedded into the spectrum of a local Noetherian UFD of the same dimension as $X$ in a way that preserves saturated chains. We also s…

Simulation-based inference with neural posterior estimation applied to X-ray spectral fitting II -- High-resolution spectroscopy with the X-ray Integral Field Unit
Simon Dupourqu\'e, Didier Barret
https://arxiv.org/abs/2506.05911

Simulation-based inference with neural posterior estimation applied to X-ray spectral fitting II -- High-resolution spectroscopy with the X-ray Integral Field Unit
X-ray spectral fitting in high-energy astrophysics can be reliably accelerated using Machine Learning. In particular, Simulation-based Inference (SBI) produces accurate posterior distributions in the Gaussian and Poisson regime for low-resolution spectra, much faster than other exact approaches such as Monte Carlo Markov Chains or Nested Sampling. We now aim to highlight the capabilities of SBI for high-resolution spectra, as what will be provided by the newAthena X-ray Integral Field Unit (X-I…

Integrating Upstream Supply Chains into Generation Expansion Planning
Boyu Yao, Andrey Bernstein, Yury Dvorkin
https://arxiv.org/abs/2508.03001 https://arx…

Integrating Upstream Supply Chains into Generation Expansion Planning
Rising electricity demand underscores the need for secure and reliable generation expansion planning that accounts for upstream supply chain constraints. Traditional models often overlook limitations in materials, manufacturing capacity, lead times for deployment, and field availability, which can delay availability of planned resources and thus to threaten system reliability. This paper introduces a multi-stage supply chain-constrained generation expansion planning (SC-GEP) model that optimize…

Hopf-Galois structures on separable field extensions of degree related to Cunningham chains
Andrew Darlington
https://arxiv.org/abs/2508.03384 https://arxi…

Hopf-Galois structures on separable field extensions of degree related to Cunningham chains
The past few years have seen Hopf--Galois structures on extensions of squarefree degree studied in various contexts. The Galois case was fully explored by Alabdali and Byott in 2020, followed by a first attempt at generalising these results to include non-normal extensions by Byott and Martin-Lyons; their work looks at separable extensions of degree $pq$ with $p,q$ distinct odd primes, and $p=2q+1$. This paper extends the latter work further by considering separable extensions of squarefree deg…

This https://arxiv.org/abs/2503.15398 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Separation of variables for higher rank integrable models: review of recent progress
Separation of variables (SoV) is a powerful method expected to be applicable for a wide range of quantum integrable systems, from models in condensed matter physics to gauge and string theories. Yet its full implementation for many higher rank examples, such as SU(N) spin chains with N>2, has remained elusive for a long time. In this pedagogical review we discuss the major progress achieved recently in understanding SoV for models of this type. In particular, for rational SU(N) spin chains we d…

From localized 4f electrons to anisotropic exchange interactions in ferromagnetic CeRh6Ge4
Shoichiro Itokazu, Akimitsu Kirikoshi, Harald O. Jeschke, Junya Otsuki
https://arxiv.org/abs/2507.03508

From localized 4f electrons to anisotropic exchange interactions in ferromagnetic CeRh6Ge4
CeRh6Ge4 is a Ce-based ferromagnetic material exhibiting a quantum critical behavior under pressure. We derive effective exchange interactions, using the framework of density functional theory combined with dynamical mean-field theory. Our results reveal that the nearest-neighbor ferromagnetic interaction along the c-axis is isotropic in spin space, leading to a formation of spin chains. On the other hand, the inter-chain coupling is highly anisotropic: The in-plane moment weakly interacts ferr…

Size-Dependent Skin Effect Transitions in Weakly Coupled Non-Reciprocal Chains
Yixuan Li, Linhu Li, Zhihao Xu
https://arxiv.org/abs/2508.02273 https://arxi…

Size-Dependent Skin Effect Transitions in Weakly Coupled Non-Reciprocal Chains
Non-Hermitian systems exhibit unique boundary phenomena absent in their Hermitian counterparts, most notably the non-Hermitian skin effect (NHSE). In this work, we explore a lattice model consisting of two coupled non-reciprocal chains, focusing on the interplay between system size, inter-chain coupling, and spectral topology. Using both analytical and numerical approaches, we systematically examine the evolution of the complex energy spectra and spectral winding numbers under periodic and open…

Central Limit Theorems for Transition Probabilities of Controlled Markov Chains
Ziwei Su, Imon Banerjee, Diego Klabjan
https://arxiv.org/abs/2508.01517 https://

Central Limit Theorems for Transition Probabilities of Controlled Markov Chains
We develop a central limit theorem (CLT) for the non-parametric estimator of the transition matrices in controlled Markov chains (CMCs) with finite state-action spaces. Our results establish precise conditions on the logging policy under which the estimator is asymptotically normal, and reveal settings in which no CLT can exist. We then build upon it to derive CLTs for the value, Q-, and advantage functions of any stationary stochastic policy, including the optimal policy recovered from the est…

"We are building a religion
We are building it bigger
We are widening the corridors
And adding more lanes
We are building a religion
A limited edition
We are now accepting callers
For these pendant key chains"

Green innovation with market imperfections within and between supply chains https://www.sciencedirect.com/science/article/pii/S0140988325004530 @…

🇺🇦 #NowPlaying on KEXP's #DriveTime
Clipse & Kendrick Lamar:
🎵 Chains & Whips
#Clipse #KendrickLamar
https://djbiggh.bandcamp.com/track/clipse-ft-kendrick-lamar-chains-whips-dj-bigg-h-redrum-dirty
https://open.spotify.com/track/3znSvEwBq09We4cxxmwlZM

Ukrainian-style oligarchic economies: how concentrated power undermines value added in production chains
Jakub Karnowski, Przemyslaw Szufel
https://arxiv.org/abs/2508.02949 http…

Ukrainian-style oligarchic economies: how concentrated power undermines value added in production chains
Oligarchic control exerts significant distortions on economic efficiency. Ukraine exemplifies this phenomenon, where oligarchs dominate key sectors and achieve economies of scale through vertical integration of coal mines, steel mills, and power plants while controlling critical infrastructure (e.g. access to transportation networks) to stifle competition. Their Soviet-era production chain monopolization strategies, coupled with political patronage networks (including both local and national go…

As Russia wages its full-scale war against Ukraine, one of its most important missile plants is quietly expanding -- bypassing international sanctions.
The Votkinsk Plant, also known as the Votkinskiy Plant,
— a strategic, state-owned facility serving Russia’s nuclear forces
— has hired thousands of new workers,
added new buildings,
and brought in advanced machinery to significantly increase its missile production.
Ukrainians have felt it firsthand.
Is…

Investigation: Russia expands strategic plant producing ICBMs — with China’s help
Key findings: * Despite international sanctions, Russia's strategic missile plant was able to import complex machinery to dramatically increase missile production. * The Kyiv Independent has identified the equipment supplied to the plant, as well as the supply chains, mostly from China. * We located the plant's new premises, built to house the new machinery. * We obtained a document confirming that the plant received an order to produce intercontinental missiles capable of reaching the U.S.

Some remarks on stochastic converse Lyapunov theorems
Pavel Osinenko, Grigory Yaremenko
https://arxiv.org/abs/2506.06053 https://arxi…

Some remarks on stochastic converse Lyapunov theorems
In this brief note, we investigate some constructions of Lyapunov functions for stochastic discrete-time stabilizable dynamical systems, in other words, controlled Markov chains. The main question here is whether a Lyapunov function in some statistical sense exists if the respective controlled Markov chain admits a stabilizing policy. We demonstrate some constructions extending on the classical results for deterministic systems. Some limitations of the constructed Lyapunov functions for stabili…

This https://arxiv.org/abs/2506.03507 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csSE_…

Software Bill of Materials in Software Supply Chain Security A Systematic Literature Review
Software Bill of Materials (SBOMs) are increasingly regarded as essential tools for securing software supply chains (SSCs), yet their real-world use and adoption barriers remain poorly understood. This systematic literature review synthesizes evidence from 40 peer-reviewed studies to evaluate how SBOMs are currently used to bolster SSC security. We identify five primary application areas: vulnerability management, transparency, component assessment, risk assessment, and SSC integrity. Despite c…

Time multidimensional Markov Renewal chains -- An algebraic approach
Leonidas Kordalis, Samis Trevezas
https://arxiv.org/abs/2508.01891 https://arxiv.org/p…

Time multidimensional Markov Renewal chains -- An algebraic approach
In this study, a new extension of the Markov Renewal theory is introduced by allowing time to evolve in multiple dimensions. The resulting chains are referred to as multi-time Markov Renewal chains and since this extension is new, the state space is assumed to be finite to cover the theoretical framework of applications, where the possible number of states of a physical system is finite. The flexibility of Markov renewal theory is still present in multiple time dimensions by allowing the sojour…

Isosystolic Inequalities for Holomorphic Chains in $\mathbb{C}P^{n}$
Luciano L. Junior
https://arxiv.org/abs/2507.23156 https://arxiv.org/pdf/2507.23156

Isosystolic Inequalities for Holomorphic Chains in $\mathbb{C}P^{n}$
We introduce the \emph{holomorphic $k$-systole} of a Hermitian metric on $\mathbb{C}P^n$, defined as the infimum of areas of homologically non-trivial holomorphic $k$-chains. Our main result establishes that, within the set of Gauduchon metrics, the Fubini-Study metric locally minimizes the volume-normalized holomorphic $(n-1)$-systole. As an application, we construct Gauduchon metrics on $\mathbb{C}P^2$ arbitrarily close to the Fubini-Study metric whose homological $2$-systole is realized by n…

Solving Markov Chains with Analog Quantum Computing: The Fine Print
Ward van der Schoot, Niels M. P. Neumann
https://arxiv.org/abs/2508.02199 https://arxiv…

Solving Markov Chains with Analog Quantum Computing: The Fine Print
With a growing interest in quantum computing, the number of proposed quantum algorithms grows as well. The practical applicability of these algorithms differs: Some can be applied out-of-the-box, while others require black box oracles, which can not always be easily implemented. One of the first works to explicitly discuss these practical applicability aspects is by Aaronson discussing the \textit{fine print} of the HHL quantum algorithm that solves linear systems of equations. We extend this l…

Team Variance Optimization of n-Player Stochastic Games with Separately Controlled Chains
Li Xia
https://arxiv.org/abs/2507.22335 https://arxiv.org/pdf/250…

Team Variance Optimization of n-Player Stochastic Games with Separately Controlled Chains
In this paper, we study a subclass of n-player stochastic games, in which each player has their own internal state controlled only by their own action and their objective is a common goal called team variance which measures the total variation of the random rewards of all players. It is assumed that players cannot observe each others' state/action. Thus, players' internal chains are controlled separately by their own action and they are coupled through the objective of team variance. Since the …

Camila Gomez Yah stretches out for diving grab to move chains https://www.nfl.com/videos/camila-gomez-yah-stretches-out-for-diving-grab-to-move-chains

Near-Field Multiuser Localization Based on Extremely Large Antenna Array with Limited RF Chains
Boyu Teng, Xiaojun Yuan, Rui Wang, Ying-Chang Liang
https://arxiv.org/abs/2506.00884

Near-Field Multiuser Localization Based on Extremely Large Antenna Array with Limited RF Chains
Extremely large antenna array (ELAA) not only effectively enhances system communication performance but also improves the sensing capabilities of communication systems, making it one of the key enabling technologies in 6G wireless networks. This paper investigates the multiuser localization problem in an uplink Multiple Input Multiple Output (MIMO) system, where the base station (BS) is equipped with an ELAA to receive signals from multiple single-antenna users. We exploit analog beamforming to…

From Thermalization to Multifractality: Spin-Spin Correlation in Disordered $SU(2)$-Invariant 1D Heisenberg Spin Chains
Debasmita Giri, Julian Siegl, John Schliemann
https://arxiv.org/abs/2508.00573

From Thermalization to Multifractality: Spin-Spin Correlation in Disordered $SU(2)$-Invariant 1D Heisenberg Spin Chains
We investigate spin correlations in one-dimensional $SU(2)$-invariant Heisenberg chains with exchange disorder for spin lengths $S=1/2$ and $S=1$. In the weak-disorder regime, the eigenmodes of the spin-spin correlation matrix are delocalized, consistent with ergodic behavior. Under strong disorder, the system enters a quasi-localized multifractal phase characterized by exponentially decaying, dimer-like spin correlations. Finite-size scaling of the inverse participation ratios of the correlati…

Tunable Itinerant Ferromagnetism in the Two-Dimensional FePd$_2$Te$_2$ Hosting 1D Spin Chains
Alberto M. Ruiz, Andrei Shumilin, Sourav Dey, Diego L\'opez-Alcal\'a, Jos\'e J. Baldov\'i
https://arxiv.org/abs/2506.01009

Tunable Itinerant Ferromagnetism in the Two-Dimensional FePd$_2$Te$_2$ Hosting 1D Spin Chains
One-dimensional (1D) magnetism offers unidirectional spin interactions that allow unique tunable properties and unconventional spin phenomena. However, it often suffers from poor stability, limiting practical applications. In this regard, integrating 1D magnetism into two-dimensional (2D) materials enables a promising route to stabilize these systems while preserving their anisotropic magnetic characteristics. Here, we focus on the 2D ferromagnet FePd$_2$Te$_2$ (T$_C$ = 183K), which hosts 1D sp…

🇺🇦 #NowPlaying on KEXP's #VarietyMix
Clipse & Kendrick Lamar:
🎵 Chains & Whips
#Clipse #KendrickLamar
https://djbiggh.bandcamp.com/track/clipse-ft-kendrick-lamar-chains-whips-dj-bigg-h-redrum-dirty
https://open.spotify.com/track/3znSvEwBq09We4cxxmwlZM

Flux tube formation and the Weingarten representation of center vortices and chains
David R. Junior, Luis E. Oxman
https://arxiv.org/abs/2508.02341 https://

Flux tube formation and the Weingarten representation of center vortices and chains
We review some recent results regarding the formulation of mixed ensembles of oriented and nonoriented center vortices based on the Weingarten representation for the sum over surfaces. This framework enabled a partition function for the Abelian-projected ensemble of vortex worldsurfaces, previously formulated as a wavefunctional peaked at center-vortex loops. In particular, we showed how an Abelian ensemble can account for $N$-ality while supporting a ``dual superconductor'' model for confineme…

This https://arxiv.org/abs/2504.06592 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csLO_…

On Coalgebraic Product Constructions for Markov Chains and Automata
Verifying traces of systems is a central topic in formal verification. We study model checking of Markov chains (MCs) against temporal properties represented as (finite) automata. For instance, given an MC and a deterministic finite automaton (DFA), a simple but practically useful model checking problem asks for the probability of traces on the MC that are accepted by the DFA. A standard approach to solving this problem constructs a product MC of the given MC and DFA, reducing the task to a sim…

While it is bad #grok is bad again, it is very good how obvious the chains are.
#ai

Hyperbolic Embeddings for Order-Aware Classification of Audio Effect Chains
Aogu Wada, Tomohiko Nakamura, Hiroshi Saruwatari
https://arxiv.org/abs/2507.20624 https://

Hyperbolic Embeddings for Order-Aware Classification of Audio Effect Chains
Audio effects (AFXs) are essential tools in music production, frequently applied in chains to shape timbre and dynamics. The order of AFXs in a chain plays a crucial role in determining the final sound, particularly when non-linear (e.g., distortion) or time-variant (e.g., chorus) processors are involved. Despite its importance, most AFX-related studies have primarily focused on estimating effect types and their parameters from a wet signal. To address this gap, we formulate AFX chain recogniti…

The Magnetic Ground State of Atacamite Cu$_2$Cl(OH)$_3$: The Crucial Role of Frustrated Zigzag Chains Revealed by Inelastic Neutron Scattering
J. L. Allen, L. Heinze, R. A. Mole, S. S\"ullow, O. Janson, S. Nishimoto, R. A. Lewis, K. C. Rule
https://arxiv.org/abs/2508.02201

The Magnetic Ground State of Atacamite Cu$_2$Cl(OH)$_3$: The Crucial Role of Frustrated Zigzag Chains Revealed by Inelastic Neutron Scattering
We report inelastic neutron scattering (INS) measurements on the magnetically frustrated $S=\frac12$ sawtooth-chain compound atacamite Cu$_2$Cl(OH)$_3$ featuring inequivalent Cu(1) and Cu(2) sites. Transverse to the sawtooth chains, INS reveals two dispersive spin-wave modes and a gap of at least 0.75 meV. This behavior is rationalized within a zigzag-chain model of Cu(2) spins in an effective magnetic field of Cu(1) spins. The model is compatible with first-principles calculations and accounts…

Markov Chains of Evolutionary Games with a Small Number of Players
Athanasios Kehagias
https://arxiv.org/abs/2506.23134 https://arxiv…

Markov Chains of Evolutionary Games with a Small Number of Players
We construct and study the transition probability matrix of evolutionary games in which the number of players is finite (and relatively small) of such games. We use a simplified version of the population games studied by Sandholm. After laying out a general framework we concentrate on specific examples, involving the Iterated Prisoner's Dilemma, the Iterated Stag Hunt, and the Rock-Paper-Scissors game. Also we consider several revision protocols: Best Response, Pairwise Comparison, Pairwise Pro…

This https://arxiv.org/abs/2505.24718 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csCV_…

Reinforcing Video Reasoning with Focused Thinking
Recent advancements in reinforcement learning, particularly through Group Relative Policy Optimization (GRPO), have significantly improved multimodal large language models for complex reasoning tasks. However, two critical limitations persist: 1) they often produce unfocused, verbose reasoning chains that obscure salient spatiotemporal cues and 2) binary rewarding fails to account for partially correct answers, resulting in high reward variance and inefficient learning. In this paper, we propos…

Son of the people, chains oppress you,
and that injustice cannot keep going;
if your existence is a world of sorrow,
death would be preferable before becoming a slave.
These bourgeoisie, way too selfish,
they despise the world,
They will be swept away by the anarchists,
To the strong shout of freedom!
Under the red banner, no more suffering,
exploitation will fall.
Stand up, loyal people,
to the shout of social revol…

This song is called Breaking the Chains and is released under the GPL-2.0 license as part of the Battle for Wesnoth game and the music is located at
https://github.com/wesnoth/wesnoth/tree/master/data/core/music
Also described at:

Poset saturation of unions of chains
Shengjin Ji, Bal\'azs Patk\'os, Erfei Yue
https://arxiv.org/abs/2505.23128 https://arxiv…

Poset saturation of unions of chains
A family $\mathcal{G}$ of sets is a(n induced) copy of a poset $P=(P,\leqslant)$ if there exists a bijection $b:P\rightarrow \mathcal{G}$ such that $p\leqslant q$ holds if and only if $b(p)\subseteq b(q)$. The induced saturation number sat$^*(n,P)$ is the minimum size of a family $\mathcal{F}\subseteq 2^{[n]}$ that does not contain any copy of $P$, but for any $G\in 2^{[n]}\setminus \mathcal{F}$, the family $\mathcal{F}\cup \{G\}$ contains a copy of $P$. We consider sat$^*(n,P)$ for posets $P$ …

This https://arxiv.org/abs/2411.06426 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csCR_…

SequentialBreak: Large Language Models Can be Fooled by Embedding Jailbreak Prompts into Sequential Prompt Chains
As the integration of the Large Language Models (LLMs) into various applications increases, so does their susceptibility to misuse, raising significant security concerns. Numerous jailbreak attacks have been proposed to assess the security defense of LLMs. Current jailbreak attacks mainly rely on scenario camouflage, prompt obfuscation, prompt optimization, and prompt iterative optimization to conceal malicious prompts. In particular, sequential prompt chains in a single query can lead LLMs to …

Vraag aan sociologen: ken je of ben je iemand die Randall Collins' concept Interaction Ritual Chains gebruikt? Ik zoek NLstalig

Assessing innovation in the nascent value chains of climate-mitigating technologies
Zachary H. Thomas, Ellen D. Williams, Kavita Surana, Morgan R. Edwards
https://arxiv.org/abs/2506.00010

Assessing innovation in the nascent value chains of climate-mitigating technologies
Accelerating climate-tech innovation in the formative stage of the technology life cycle is crucial to meeting climate policy goals. During this period, competing technologies are often undergoing major technical improvements within a nascent value chain. We analyze this formative stage for 14 climate-tech sectors using a dataset of 4,172 North American firms receiving 12,929 early-stage private investments between 2006 and 2021. Investments in these firms reveal that commercialization occurs i…

The Arnoldi Aggregation for Approximate Transient Distributions of Markov Chains
Patrick Sonnentag, Fabian Michel, Markus Siegle
https://arxiv.org/abs/2508.02078 https://…

The Arnoldi Aggregation for Approximate Transient Distributions of Markov Chains
The paper proposes a new aggregation method, based on the Arnoldi iteration, for computing approximate transient distributions of Markov chains. This aggregation is not partition-based, which means that an aggregate state may represent any portion of any original state, leading to a reduced system which is not a Markov chain. Results on exactness (in case the algorithm finds an invariant Krylov subspace) and minimality of the size of the Arnoldi aggregation are proven. For practical use, a heur…

Kibble-Zurek dynamics across the first-order quantum transitions of quantum Ising chains in the thermodynamic limit
Andrea Pelissetto, Davide Rossini, Ettore Vicari
https://arxiv.org/abs/2507.00178

Kibble-Zurek dynamics across the first-order quantum transitions of quantum Ising chains in the thermodynamic limit
We study the out-of-equilibrium Kibble-Zurek (KZ) dynamics in quantum Ising chains in a transverse field, driven by a time-dependent longitudinal field $h(t)=t/t_s$ ($t_s$ is the time scale of the protocol), across their first-order quantum transitions (FOQTs) at $h=0$. The KZ protocol starts at time $t_i<0$ from the negatively magnetized ground state for $h_i = t_i/t_s<0$. Then, the system evolves unitarily up to a time $t_f > 0$, such that the magnetization of the state at time $t_f$ is posit…

Neurosymbolic Feature Extraction for Identifying Forced Labor in Supply Chains
Zili Wang, Frank Montabon, Kristin Yvonne Rozier
https://arxiv.org/abs/2507.07217

Neurosymbolic Feature Extraction for Identifying Forced Labor in Supply Chains
Supply chain networks are complex systems that are challenging to analyze; this problem is exacerbated when there are illicit activities involved in the supply chain, such as counterfeit parts, forced labor, or human trafficking. While machine learning (ML) can find patterns in complex systems like supply chains, traditional ML techniques require large training data sets. However, illicit supply chains are characterized by very sparse data, and the data that is available is often (purposely) co…

Breaking Peierls theorem in polyacetylene chains via topological design
Xinnan Peng, Marco Lozano, Jie Su, Lulu Wang, Diego Soler-Polo, Thomas Tuloup, Junting Wang, Shaotang Song, Ming Wah Wong, Jiangbin Gong, Junzhi Liu, Franz J Giessibl, Pavel Jel\'inek, Jiong Lu
https://arxiv.org/abs/2508.02365

Breaking Peierls theorem in polyacetylene chains via topological design
Peierls theorem postulates that a one-dimensional (1D) metallic chain must undergo a metal-to-insulator transition via lattice distortion, resulting in bond length alternation (BLA) within the chain. The validity of this theorem has been repeatedly proven in practice, as evidenced by the absence of a metallic phase in low-dimensional atomic lattices and electronic crystals, including conjugated polymers, artificial 1D quantum nanowires, and anisotropic inorganic crystals. Overcoming this transi…

Resilient Multi-Agent Negotiation for Medical Supply Chains:Integrating LLMs and Blockchain for Transparent Coordination
Mariam ALMutairi, Hyungmin Kim
https://arxiv.org/abs/2507.17134

Resilient Multi-Agent Negotiation for Medical Supply Chains:Integrating LLMs and Blockchain for Transparent Coordination
Global health emergencies, such as the COVID-19 pandemic, have exposed critical weaknesses in traditional medical supply chains, including inefficiencies in resource allocation, lack of transparency, and poor adaptability to dynamic disruptions. This paper presents a novel hybrid framework that integrates blockchain technology with a decentralized, large language model (LLM) powered multi-agent negotiation system to enhance the resilience and accountability of medical supply chains during crise…

UNPOPULAR OPINION
Kendrick's 2nd half verse on Chains and Whips cements why he's inferior to the Clipse, and others*. Couldn't help but jump into the rappity-rap, but bad for THAT SONG.
*obligatory "yes, i do hate drake much more than both of them"
#hiphop #blackmastodon

Robustness of Majorana modes to potential disorder in Fe chains on a superconducting Rashba alloy
Harim Jang, Daniel Crawford, Khai Ton That, Lucas Schneider, Jens Wiebe, Makoto Shimizu, Harald O. Jeschke, Stephan Rachel, Roland Wiesendanger
https://arxiv.org/abs/2506.17414

Robustness of Majorana modes to potential disorder in Fe chains on a superconducting Rashba alloy
Majorana modes offer great potential for fault-tolerant quantum computation due to their topological protection. However, for superconductor-semiconductor nanowire hybrids, intrinsic disorder makes the unambiguous detection of Majorana modes difficult. Here, we construct 1D spin chains from individual Fe atoms on the Rashba surface alloy BiAg2/Ag(111) with proximity-induced superconductivity from a Nb(110) substrate. While the Fe chains exhibit perfect crystalline order, we observe nano-scale p…

Graph-based block-diagonalization of full configuration interaction Hamiltonian: H$_2$ chains study
Hayun Park, Hunpyo Lee
https://arxiv.org/abs/2507.23593 https://

Graph-based block-diagonalization of full configuration interaction Hamiltonian: H$_2$ chains study
We developed a graph-based block-diagonalization (GBBD) method for the full configuration interaction Hamiltonian of molecular systems to efficiently calculate the exact eigenvalues of low-energy states. In this approach, the non-zero matrix elements of the Hamiltonian are represented as edges on a graph, which naturally decomposes into disconnected clusters. Each cluster corresponds to an independent block in the block-diagonalized form of the Hamiltonian. The eigenvalues in the low-energy sec…

Quantum channel for modeling spin-motion dephasing in Rydberg chains
Christopher Wyenberg, Kent Ueno, Alexandre Cooper
https://arxiv.org/abs/2506.24082 htt…

Quantum channel for modeling spin-motion dephasing in Rydberg chains
We introduce a quantum channel to model the dissipative dynamics resulting from the coupling between spin and motional degrees of freedom in chains of neutral atoms with Rydberg interactions. The quantum channel acts on the reduced spin state obtained under the frozen gas approximation, modulating its elements with time-dependent coefficients. These coefficients can be computed exactly in the perturbative regime, enabling efficient modeling of spin-motion dephasing in systems too large for exac…

Entanglement spreading and emergent locality in Brownian SYK chains
Onkar Parrikar, Jatin Narde, Harshit Rajgadia, Sandip Trivedi
https://arxiv.org/abs/2508.00060 https://

Entanglement spreading and emergent locality in Brownian SYK chains
The Ryu-Takayanagi (RT) formula and its interpretation in terms of quantum error correction (QEC) implies an emergent locality for the spread of quantum information in holographic CFTs, where information injected at a point in the boundary theory spreads within a sharp light-cone corresponding to the butterfly velocity. This emergent locality is a necessary condition for the existence of a geometric bulk dual with an RT-like formula for entanglement entropy. In this paper, we use tools from QEC…

Software Bill of Materials in Software Supply Chain Security A Systematic Literature Review
Eric O'Donoghue, Yvette Hastings, Ernesto Ortiz, A. Redempta Manzi Muneza
https://arxiv.org/abs/2506.03507

Software Bill of Materials in Software Supply Chain Security A Systematic Literature Review
Software Bill of Materials (SBOMs) are increasingly regarded as essential tools for securing software supply chains (SSCs), yet their real-world use and adoption barriers remain poorly understood. This systematic literature review synthesizes evidence from 40 peer-reviewed studies to evaluate how SBOMs are currently used to bolster SSC security. We identify five primary application areas: vulnerability management, transparency, component assessment, risk assessment, and SSC integrity. Despite c…

Towards a Banach Space Chernoff Bound for Markov Chains via Chaining Arguments
Shravas Rao
https://arxiv.org/abs/2508.02955 https://arxiv.org/pdf/2508.0295…

Towards a Banach Space Chernoff Bound for Markov Chains via Chaining Arguments
Let $\{Y_i\}_{i=1}^{\infty}$ be a stationary reversible Markov chain with state space $[N]$, let $(X, \| \cdot \|)$ be a real-valued Banach space and let $f_1, \ldots, f_n: [N] \rightarrow X$ be functions with mean $0$ such that $\|f_i(v)\| \leq 1$ for all $i$ and $v$. We prove bounds on the expected value of and deviation bounds for the random variable $\|f_1(Y_1)+\cdots+f_n(Y_n)\|$. For large enough $n$ that depends on the Banach space (and not $N$), these bounds…

This https://arxiv.org/abs/2411.18961 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

The Fefferman metric for twistor CR manifolds and conformal geodesics in dimension three
We give an explicit description of the Fefferman metric for twistor CR manifolds in terms of Riemannian structures on the base conformal $3$-manifolds. As an application, we prove that chains and null chains on twistor CR manifolds project to conformal geodesics, and that any conformal geodesic has lifts both to a chain and a null chain. By using this correspondence, we give a variational characterization of conformal geodesics in dimension three which involves the total torsion functional.

It’s truly remarkable that we exist at all. Each of us breaks free from the chains of history and authority to experience life anew. Today, countless souls will awaken to their first love, their first union, or the birth of new life. Others will face heartbreak or part ways.
This moment, this very act of being alive and conscious, is a quiet act of rebellion against the forces that seek to suppress our humanity. To exist freely for the first time is the most radical and beautiful thing…

Unraveling Global Threads: Pandemic, Geopolitical Conflict, and Resilience in Fashion and Textile Supply Chain
Md. Al-Amin, Muneeb Tahir, Amit Talukder, Abdullah Al Mamun, Md Tanjim Hossain, Nigar Sultana
https://arxiv.org/abs/2507.00207

Unraveling Global Threads: Pandemic, Geopolitical Conflict, and Resilience in Fashion and Textile Supply Chain
Several noteworthy scenarios emerged in the global textile and fashion supply chains during and after the COVID-19 pandemic. The destabilizing influences of a global pandemic and a geographically localized conflict are being acutely noticed in the worldwide fashion and textile supply chains. This work examines the impact of the COVID-19 pandemic, the Russo-Ukraine conflict, Israel-Palestine conflict, and Indo-Pak conflict on supply chains within the textile and fashion industry. This research e…

Interferometric and Bipartite OTOC for Non-Markovian Open Quantum Spin-Chains and Lipkin-Meshkov-Glick Model
Baibhab Bose, Devvrat Tiwari, Subhashish Banerjee
https://arxiv.org/abs/2506.23796

Interferometric and Bipartite OTOC for Non-Markovian Open Quantum Spin-Chains and Lipkin-Meshkov-Glick Model
The information scrambling phenomena in an open quantum system modeled by Ising spin chains coupled to Lipkin-Meshkov-Glick (LMG) baths are observed via an interferometric method for obtaining out-of-time-ordered correlators ($\mathcal{F}-$OTOC). We also use an anisotropic bath connecting to a system of tilted field Ising spin chain in order to confirm that such situations are suitable for the emergence of ballistic spreading of information manifested in the light cones in the $\mathcal{F}-$OTO…

This https://arxiv.org/abs/2405.05969 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Learned harmonic mean estimation of the Bayesian evidence with normalizing flows
We present the learned harmonic mean estimator with normalizing flows - a robust, scalable and flexible estimator of the Bayesian evidence for model comparison. Since the estimator is agnostic to sampling strategy and simply requires posterior samples, it can be applied to compute the evidence using any Markov chain Monte Carlo (MCMC) sampling technique, including saved down MCMC chains, or any variational inference approach. The learned harmonic mean estimator was recently introduced, where ma…

Live again! As always, animating and all that :neofox_think_googly:
#Livestream

Demirramon - Twitch
Animating | Chains of Fate - Good Evening Sun Sim - day 36

This https://arxiv.org/abs/2505.22420 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Robustness of topological edge states in open alternating spin chains
Both the Haldane spin-$1$ chain and dimerized chains of spin-$1/2$ exhibit topologically protected edge states that are robust against specific perturbations. Recently, such spin chains have been specifically assembled on surfaces and we investigate here the robustness of these edge states against coupling to the surface. Since no physical system can be considered perfectly isolated, it is crucial to examine whether topological robustness is maintained in the presence of environme…

Gefitinib-Induced Interface Engineering Enhances the Defect Formation Energy for Highly Efficient and Stable Perovskite Solar Cells
Xianhu Wu, Guanglei Cui, Jieyu Bi, Gaojie Xia, Zewen Zuo, Min Gu
https://arxiv.org/abs/2506.03611

Gefitinib-Induced Interface Engineering Enhances the Defect Formation Energy for Highly Efficient and Stable Perovskite Solar Cells
Poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) has been widely used as a hole transport layer in perovskite solar cells (PSCs). However, the high interface defect density and energy level mismatch between PEDOT:PSS and perovskite can lead to significant open-circuit voltage loss. Additionally, the free PSS chains on the surface of PEDOT:PSS can absorb water molecules, promoting the degradation of perovskite at the PEDOT:PSS/perovskite interface. Here, gefitinib is used to mod…

Attention (as Discrete-Time Markov) Chains
Yotam Erel, Olaf D\"unkel, Rishabh Dabral, Vladislav Golyanik, Christian Theobalt, Amit H. Bermano
https://arxiv.org/abs/2507.17657

Attention (as Discrete-Time Markov) Chains
We introduce a new interpretation of the attention matrix as a discrete-time Markov chain. Our interpretation sheds light on common operations involving attention scores such as selection, summation, and averaging in a unified framework. It further extends them by considering indirect attention, propagated through the Markov chain, as opposed to previous studies that only model immediate effects. Our main observation is that tokens corresponding to semantically similar regions form a set of met…

Efficient Solving of Large Single Input Superstate Decomposable Markovian Decision Process
Youssef Ait El Mahjoub, Jean-Michel Fourneau, Salma Alouah
https://arxiv.org/abs/2508.00816

Efficient Solving of Large Single Input Superstate Decomposable Markovian Decision Process
Solving Markov Decision Processes (MDPs) remains a central challenge in sequential decision-making, especially when dealing with large state spaces and long-term optimization criteria. A key step in Bellman dynamic programming algorithms is the policy evaluation, which becomes computationally demanding in infinite-horizon settings such as average-reward or discounted-reward formulations. In the context of Markov chains, aggregation and disaggregation techniques have for a long time been used to…

Complexation of a Thermoresponsive Brush-Type Polyelectrolyte with an Oppositely Charged Surfactant: Effect of Temperature and Surfactant Concentration
Hern\'an A. Ritacco, Macos D. Fern\'andez Leyes, Zulma Quirolo, M. M. Soledad Lencina, Cecilia del Barrio, Rafael M\'arquez, Jaqueline Fern\'andez, Jhon S\'anchez Morales
https://

Complexation of a Thermoresponsive Brush-Type Polyelectrolyte with an Oppositely Charged Surfactant: Effect of Temperature and Surfactant Concentration
Responsive drug delivery vectors can be designed using oppositely charged polyelectrolyte-surfactant complexes. As a model, we created a brush-type copolymer (PECop), combining alginate and Poly(N-isopropylacrylamide) (PNIPAAm), whose side chains respond to temperature. Aggregation of PECop with the cationic surfactant dodecyltrimethylammonium bromide (DTAB) was examined versus surfactant concentration and temperature. We used surface tension, electrophoretic mobility, zeta potential, potentiom…

Eigenstate Thermalization Hypothesis (ETH) for off-diagonal matrix elements in integrable spin chains
Federico Rottoli, Vincenzo Alba
https://arxiv.org/abs/2505.23602

Eigenstate Thermalization Hypothesis (ETH) for off-diagonal matrix elements in integrable spin chains
We investigate off-diagonal matrix elements of local operators in integrable spin chains, focusing on the isotropic spin-$1/2$ Heisenberg chain ($XXX$ chain). We employ state-of-the-art Algebraic Bethe Ansatz results, which allow us to efficiently compute matrix elements of operators with support up to two sites between generic energy eigenstates. We consider both matrix elements between eigenstates that are in the same thermodynamic macrostate, as well as eigenstates that belong to different m…

Green Ammonia: A Techno-Economic Supply Chain Optimization
Lucien Genge, Felix M\"usgens
https://arxiv.org/abs/2507.02412 https://

Green Ammonia: A Techno-Economic Supply Chain Optimization
Green ammonia is emerging as a strategic intermediary within green energy supply chains, serving effectively as both an industrial commodity and hydrogen carrier. This study provides a techno-economic analysis of green ammonia supply chains, comparing cost-effective pathways from global production to European consumers, and evaluates ammonia alongside alternative hydrogen carriers. Gaseous hydrogen consistently remains the most economical import option for Europe, though ammonia holds a narrowi…

Entanglement dynamics in minimal Kitaev chains
Vimalesh Kumar Vimal, Jorge Cayao
https://arxiv.org/abs/2507.17586 https://arxiv.org/pdf/2507.17586

Entanglement dynamics in minimal Kitaev chains
Minimal Kitaev chains host Majorana quasiparticles, which, although not topologically protected, exhibit spatial nonlocality and hence expected to be useful for quantum information tasks. In this work, we consider two- and three-site Kitaev chains and investigate the dynamics of bipartite and multipartite entanglement by means of concurrence and geometric measure of entanglement. In two-site Kitaev chains, we find that maximally entangled states can robustly emerge, with their stability and per…

Localized atomic vibrations caused by point impurity in long chains of noble gas atoms adsorbed in outer grooves of carbon nanobundle
E. V. Manzhelii, S. B. Feodosyev
https://arxiv.org/abs/2505.24497

Localized atomic vibrations caused by point impurity in long chains of noble gas atoms adsorbed in outer grooves of carbon nanobundle
The characteristics of discrete vibrational levels caused by a point three-parameter substitutional impurity in long linear chain of inert gas atoms adsorbed in groove on the surface of carbon nanobundle are studied. The impurity atom differs from the atoms of the chain in the following parameters: the mass, the parameter of interaction with neighboring atoms and the parameter of interaction with the substrate. Analytical expressions for the frequencies of the localized vibrations and the inten…

A general fusion procedure for open $\mathfrak{gl}(N)$ spin chains: Application to the ABJM spin chain
Nan Bai
https://arxiv.org/abs/2507.19394 https://arx…

A general fusion procedure for open $\mathfrak{gl}(N)$ spin chains: Application to the ABJM spin chain
We formulate a general fusion procedure for open $\mathfrak{gl}(N)$ spin chains. We construct the fused boundary reflection matrices and the corresponding fused reflection equations. By using the intertwining relation between the fused reflection matrices and the fusion operator, we identify the invariant subspace of the fused reflection matrices carrying the irreducible representations of $\mathfrak{gl}(N)$. We also construct the fused transfer matrix and evaluate it explicitly in the total te…

🇺🇦 #NowPlaying on KEXP's #MorningShow
Alice in Chains:
🎵 Man in the Box
#AliceinChains
https://zpmusic1.bandcamp.com/track/alice-in-chains-man-in-the-box-guitar-cover
https://open.spotify.com/track/6gZVQvQZOFpzIy3HblJ20F

Continuous symmetry breaking in 1D spin chains and 1 1D field theory
Adam Nahum
https://arxiv.org/abs/2506.21540 https://arxiv.org/pd…

Continuous symmetry breaking in 1D spin chains and 1+1D field theory
We argue that ground states of 1D spin chains can spontaneously break U(1) ``easy-plane'' spin rotation symmetry, via true long-range order of $(S^x, S^y)$, at the phase transition between two quasi-long-range-ordered phases. The critical point can be reached by tuning a single parameter in a Hamiltonian with the same symmetry as the XXZ model, without further fine-tuning. Equivalently, it can arise in systems of bosons with particle-hole symmetry, as a long-range-ordered transition point betwe…

Live again! Will we finish the animation TODAY? Let's find out!
#Livestream #FurryLivestream

Demirramon - Twitch
Animating | Chains of Fate - Good Evening Sun Sim - day 41

Direct signatures of $d$-level hybridization and dimerization in magnetic adatom chains on a superconductor
Lisa M. R\"utten, Eva Liebhaber, Gael Reecht, Kai Rossnagel, Katharina J. Franke
https://arxiv.org/abs/2507.21847

Direct signatures of $d$-level hybridization and dimerization in magnetic adatom chains on a superconductor
Magnetic adatom chains on superconductors provide a platform to explore correlated spin states and emergent quantum phases. Using low-temperature scanning tunneling spectroscopy, we study the distance-dependent interaction between Fe atoms on 2H-NbSe$_2$. While single atoms exhibit four Yu-Shiba-Rusinov states and partially occupied $d$ levels consistent with a $S=2$ spin state, the spin is quenched when two Fe atoms reside in nearest neighbor lattice sites, where the $d$ levels of the atoms hy…

Genuine multipartite entanglement as a probe of many-body localization in disordered spin chains with Dzyaloshinskii-Moriya interactions
Triyas Sapui, Keshav Das Agarwal, Tanoy Kanti Konar, Leela Ganesh Chandra Lakkaraju, Aditi Sen De
https://arxiv.org/abs/2507.22795

Genuine multipartite entanglement as a probe of many-body localization in disordered spin chains with Dzyaloshinskii-Moriya interactions
We demonstrate that the quenched average genuine multipartite entanglement (GME) can approach its maximum value in the ergodic phase of a disordered quantum spin model. In contrast, GME vanishes in the many-body localized (MBL) phase, both in equilibrium and in the long-time dynamical steady state, indicating a lack of useful entanglement in the localized regime. To establish this, we analyze the disordered Heisenberg spin chain subjected to a random magnetic field and incorporating two- and th…

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Alice in Chains:
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#AliceinChains
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Uniqueness of stationary compatible probability measure for chains of infinite order with forbidden transitions
Christophe Gallesco, Alexsandro Gallo, Daniel Yasumasa Takahashi
https://arxiv.org/abs/2507.16981

Uniqueness of stationary compatible probability measure for chains of infinite order with forbidden transitions
In this paper, we consider chains of infinite order on countable state spaces with prohibited transitions. We give a set of sufficient conditions on the structure of the probability kernels of the chains to have at most one stationary probability measure compatible with the kernel. Our main result extends the uniqueness $\ell^2$ criterion from Johansson and Öberg (2003) which was obtained for strongly non-null chains. A particular attention is given to concrete examples, illustrating the main …

States decoupled from the surface in short Si atomic chains
Tomasz Kwapi\'nski, Marek Dachniewicz, Marcin Kurzyna, Mieczys{\l}aw Ja{\l}ochowski
https://arxiv.org/abs/2506.17822

States decoupled from the surface in short Si atomic chains
We analyze both the stationary and time-dependent properties of molecular states in atomic chains on a surface, some of which are composed of atomic states decoupled from the substrate - a phenomenon analogous to dark states in quantum dot systems. To illustrate this effect at the atomic scale, we performed scanning tunneling microscopy (STM) experiments on short silicon chains fabricated on a Si(553)-Au surface. In contrast to quantum dots, which typically involve characteristic energies in th…

Jordanian spin chains for twisted strings in $AdS_5\times S^5$
Sibylle Driezen, Adrien Molines
https://arxiv.org/abs/2507.13911 https://

Jordanian spin chains for twisted strings in $AdS_5\times S^5$
We study the integrable spin chain formulation of Jordanian deformations of the $AdS_5\times S^5$ superstring, realised via Drinfel'd twists. Among these models, we first identify a unique supergravity deformation confined to an $SL(2,\mathbb{R})$ sector and with constant dilaton. We then develop a general framework for closed Drinfel'd twisted spin chains and construct an explicit map to undeformed models with twisted-boundary conditions. Applied to the non compact $\mathrm{XXX}_{-1/2}$ spin c…

General diffusions on metric graphs as limits of time-space Markov Chains
Alexis Anagnostakis
https://arxiv.org/abs/2507.23724 https://arxiv.org/pdf/2507.2…

General diffusions on metric graphs as limits of time-space Markov Chains
We introduce the Space-Time Markov Chain Approximation (STMCA) for a general diffusion process on a finite metric graph $Γ$. The STMCA is a doubly asymmetric (in both time and space) random walk defined on a subdivisions of $Γ$, with transition probabilities and conditional transition times that match, in expectation, those of the target diffusion. We derive bounds on the $p$-Wasserstein distances between the diffusion and its STMCA in terms of a thinness quantifier of the subdivision. This b…

State transfer analysis for linear spin chains with non-uniform on-site energies
Chad C. Nelmes, Irene D'Amico, Timothy P. Spiller
https://arxiv.org/abs/2507.13261

State transfer analysis for linear spin chains with non-uniform on-site energies
High fidelity state transfer is an important ingredient of distributed quantum information processing. We present and analyse results on perfect and quasi-perfect state transfer with linear spin chains incorporating non-uniform on-site energies. The motivation is maintenance of coupling uniformity, which could be beneficial for some physical implementations. We relate this coupling uniformity to a particle in a discrete potential analogue. Our analysis further considers the statistical variatio…

Discrete solitons in Rydberg atom chains
Aron Kerschbaumer, Jean-Yves Desaules, Marko Ljubotina, Maksym Serbyn
https://arxiv.org/abs/2507.13196 https://

Discrete solitons in Rydberg atom chains
Solitons - localized wave packets that travel without spreading - play a central role in understanding transport and properties of nonlinear systems, from optical fibers to fluid dynamics. In quantum many-body systems, however, such robust excitations are typically destroyed by thermalization. Here, we theoretically demonstrate the existence of solitonic excitations in high-energy states of Rydberg atom chains in the regime of strong nearest-neighbor Rydberg blockade. These localized wave packe…