Tootfinder

Haben sich die üblichen Zürcher Verdächtigen schon kräftig aufgeregt, oder sind die momentan alle in den Ferien? #criticalmass #zurich

Regularity and long-time behavior of global weak solutions to a coupled Cahn-Hilliard system: the off-critical case
Bohan Ouyang
https://arxiv.org/abs/2404.19271 https://arxiv.org/pdf/2404.19271
arXiv:2404.19271v1 Announce Type: new
Abstract: We consider a diffuse interface model that describes the macro- and micro-phase separation processes of a polymer mixture. The resulting system consists of a Cahn-Hilliard equation and a Cahn-Hilliard-Oono type equation endowed with the singular Flory-Huggins potential. For the initial boundary value problem in a bounded smooth domain of $\mathbb{R}^d$ ($d\in\{2,3\}$) with homogeneous Neumann boundary conditions for the phase functions as well as chemical potentials, we study the regularity and long-time behavior of global weak solutions in the off-critical case, i.e., the mass is not conserved during the micro-phase separation of diblock copolymers. By investigating an auxiliary system with viscous regularizations, we show that every global weak solution regularizes instantaneously for $t>0$. In two dimensions, we obtain the instantaneous strict separation property under a mild growth condition on the first derivative of potential functions near pure phases $\pm 1$, while in three dimensions, we establish the eventual strict separation property for sufficiently large time. Finally, we prove that every global weak solution converges to a single equilibrium as $t\to \infty$.

Critical Mass is tomorrow!
There are now two in the Bay Area: the one in SF, and a new one in Oakland

Models of hot star decretion disks
Petr Kurf\"urst
https://arxiv.org/abs/2402.17575 https://arxiv.org/pdf/2402.17575

Models of hot star decretion disks
Massive stars can during their evolution reach the phase of critical (or very rapid, near-critical) rotation when further increase in rotation rate is no longer kinematically allowed. The mass ejection and angular momentum outward transport from such rapidly rotating star's equatorial surface may lead to formation and supports further existence of a circumstellar outflowing (stellar decretion) disk. The efficient mechanism for the outward transport of the mass and angular momentum is provided b…

Feedback in the dark: a critical examination of CMB bounds on primordial black holes
Dominic Agius, Rouven Essig, Daniele Gaggero, Francesca Scarcella, Gregory Suczewski, Mauro Valli
https://arxiv.org/abs/2403.18895

Feedback in the dark: a critical examination of CMB bounds on primordial black holes
If present in the early universe, primordial black holes (PBHs) will accrete matter and emit high-energy photons, altering the statistical properties of the {Cosmic Microwave Background (CMB)}. This mechanism has been used to constrain the fraction of dark matter that is in the form of PBHs to be much smaller than unity for PBH masses well above one solar mass. Moreover, the presence of dense dark matter mini-halos around the PBHs has been used to set even more stringent constraints, as these w…

Robust mass lumping and outlier removal strategies in isogeometric analysis
Yannis Voet, Espen Sande, Annalisa Buffa
https://arxiv.org/abs/2402.14956 https…

Robust mass lumping and outlier removal strategies in isogeometric analysis
Mass lumping techniques are commonly employed in explicit time integration schemes for problems in structural dynamics and both avoid solving costly linear systems with the consistent mass matrix and increase the critical time step. In isogeometric analysis, the critical time step is constrained by so-called "outlier" frequencies, representing the inaccurate high frequency part of the spectrum. Removing or dampening these high frequencies is paramount for fast explicit solution techniques. In t…

Mass Concentration of Two-Spinless Fermi Systems with Attractive Interactions
Yujin Guo, Yan Li
https://arxiv.org/abs/2403.17591 https://

Mass Concentration of Two-Spinless Fermi Systems with Attractive Interactions
We study the two-spinless mass-critical Fermi systems with attractive interactions and trapping potentials. We prove that ground states of the system exist, if and only if the strength $a$ of attractive interactions satisfies $0

Before you head out for the weekend, check out today's Metacurity for the most important infosec developments you should know, including
--Hackers are starting mass exploitation of TeamCity's critical vulnerability
--GhostSec and Stormous launch double-extortion attacks using new RaaS program,
--Stormous claims attack on Belgian brewery,
--Hacking ring targets doctors and other prescription writers to sell drugs,
--China's private hacking industry is a cesspool,
--Devices can hack Teslas in MiTM attacks,
--WordPress sites subject to widescale brute-force attacks,
--UnitedHealth begins restoration,
--TikTok users inundate Congress,
--much more
https://www.metacurity.com/p/hackers-starting-mass-exploitation-teamcitys-critical-vulnerability

SK Hynix partners with TSMC to develop next-gen HBM4 chips, which are critical for AI and slated for mass production in 2026, and advanced chip packaging tech (Nikkei Asia)
https://t.co/Q0zakQtLgT

SK Hynix partners with TSMC to develop advanced AI chips
Asian chipmakers aim to supply next-generation high-bandwidth memory for Nvidia

Transmission IR Microscopy for the Quantitation of Biomolecular Mass In Live Cells
Yow-Ren Chang, Seong-Min Kim, Young Jong Lee
https://arxiv.org/abs/2403.18881

Transmission IR Microscopy for the Quantitation of Biomolecular Mass In Live Cells
Absolute quantity imaging of biomolecules on a single cell level is critical for measurement assurance in biosciences and bioindustries. While infrared (IR) transmission microscopy is a powerful label-free imaging modality capable of chemical quantification, its applicability to hydrated biological samples remains challenging due to the strong water absorption. We overcome this challenge by applying a solvent absorption compensation (SAC) technique to a home-built quantum cascade laser IR micro…

Die #IGMetall ist die größte und stärkste Gewerkschaft, gleichzeitig ist die #Fahrradbranche besonders schwach organisiert. Das dürfte ein wichtiger Grund sein, dass die Gehälter so gering sind, dass die Nachwuchsförderung so schwach ist und dass die

Two mass-imbalanced atoms in a hard-wall trap: Deep learning integrability of many-body systems
Liheng Lang, Qichen Lu, C. M. Dai, Xingbo Wei, Yanxia Liu, Yunbo Zhang
https://arxiv.org/abs/2402.16244

Two mass-imbalanced atoms in a hard-wall trap: Deep learning integrability of many-body systems
The study of integrable systems has led to significant advancements in our understanding of many-body physics. We design a series of numerical experiments to analyze the integrability of a mass-imbalanced two-body system through energy level statistics and deep learning of wavefunctions. The level spacing distributions are fitted by a Brody distribution and the fitting parameter $ω$ is found to separate the integrable and non-integrable mass ratios by a critical line $ω=0$. The convolutional …

This https://arxiv.org/abs/2311.09339 has been replaced.
initial toot: https://mastoxiv.page/@ar…

Wake Interference Effects on Flapping Dynamics of Elastic Inverted Foil
Using high-fidelity simulations, we study the self-induced flapping dynamics of an inverted elastic foil when it is placed in tandem with a stationary circular cylinder. The effect of wake interference on the inverted foil's coupled dynamics is examined at a fixed Reynolds number ($Re$) as a function of non-dimensional bending rigidity ($K_{B}$) and the structure to fluid mass ratio ($m^{*}$). Our results show that there exists a critical $K_{B, Cr} = 0.25$, above which the downstream foil is s…

The Biden administration will give $1.5 billion to help build a vast new computer-chip factory in New York state as part of an effort to strengthen the country’s ability to mass-produce the brains of modern consumer and military electronics.
The grant, formally unveiled Monday, is the third announced as part of the 🔹Chips and Science Act,🔹 a $52 billion program President Biden signed in 2022 in hopes of supercharging U.S. manufacturing of semiconductors, which are largely made overseas…

U.S. to give $1.5 billion for computer-chip plant, heating up global race
The massive grant, part of the Chips Act, will help the U.S. establish a homegrown supply for some of the most critical components of modern life.

Precise measurement of the $e^ e^-\to D_s^ D_s^-$ cross sections at center-of-mass energies from threshold to 4.95 GeV
BESIII Collaboration, et al.
https://arxiv.org/abs/2403.14998

Precise measurement of the $e^+e^-\to D_s^+D_s^-$ cross sections at center-of-mass energies from threshold to 4.95 GeV
Using the $e^+e^-$ collision data collected with the BESIII detector operating at the BEPCII collider, at center-of-mass energies from the threshold to $4.95$~GeV, we present precise measurements of the cross sections for the process $e^+e^-\to D_s^+D_s^-$ using a single tag method. The resulting cross section lineshape exhibits several new structures, thereby offering an input for coupled channel analysis and model tests, which are critical to understand vector charmonium-like states with mass…

The SAGA Survey. V. Modeling Satellite Systems around Milky Way-mass Galaxies with Updated UniverseMachine
Yunchong Wang (Stanford/SLAC/KIPAC), Ethan O. Nadler (Carnegie Obs, USC), Yao-Yuan Mao (U Utah), Risa H. Wechsler (Stanford/SLAC/KIPAC), Tom Abel (Stanford/SLAC/KIPAC), Peter Behroozi (U Arizona/Steward, NAOJ), Marla Geha (Yale), Yasmeen Asali (Yale), Mithi A. C. de los Reyes (Amherst College), Erin Kado-Fong (Yale), Nitya Kallivayalil (U Virginia), Erik J. Tollerud (STScI), Benja…

The SAGA Survey. V. Modeling Satellite Systems around Milky Way-mass Galaxies with Updated UniverseMachine
Environment plays a critical role in shaping the assembly of low-mass galaxies. Here, we use the UniverseMachine (UM) galaxy-halo connection framework and the Data Release 3 of the Satellites Around Galactic Analogs (SAGA) Survey to place dwarf galaxy star formation and quenching into a cosmological context. UM is a data-driven forward model that flexibly parameterizes galaxy star formation rates (SFR) using only halo mass and assembly history. We add a new quenching model to UM, tailored for g…

This https://arxiv.org/abs/2311.18211 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Analytic approach to astrometric perturbations of critical curves by substructures
Astrometric perturbations of critical curves in strong lens systems are thought to be one of the most promising probes of substructures down to small-mass scales. While a smooth mass distribution creates a symmetric geometry of critical curves with radii of curvature about the Einstein radius, substructures introduce small-scale distortions on critical curves, which can break the symmetry of gravitational lensing events near critical curves, such as highly magnified individual stars. We derive …

This https://arxiv.org/abs/2404.07257 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Radial stability of spherical bosonic stars and critical points
We study radial perturbations of spherically symmetric spin-$0$ and spin-$1$ bosonic stars, computing numerically the squared frequency of the fundamental mode. We find that not all critical points $-$ where the Arnowitt-Deser-Misner mass attains an extremum $-$ correspond to zero modes. Thus, radial stability does not $\textit{always}$ change at such critical points. The results are in agreement with the so-called critical point method.

Generalized Chern-Simons-Schrodinger system with critical exponential growth: the zero mass case
Liejun Shen, Marco Squassina
https://arxiv.org/abs/2403.18014

Generalized Chern-Simons-Schrodinger system with critical exponential growth: the zero mass case
We consider the existence of ground state solutions for a class of zero-mass Chern-Simons-Schrödinger systems \[ \left\{ \begin{array}{ll} \displaystyle -Δu +A_0 u+\sum\limits_{j=1}^2A_j^2 u=f(u)-a(x)|u|^{p-2}u, \newline \displaystyle \partial_1A_2-\partial_2A_1=-\frac{1}{2}|u|^2,~\partial_1A_1+\partial_2A_2=0, \newline \displaystyle \partial_1A_0=A_2|u|^2,~ \partial_2A_0=-A_1|u|^2, \end{array} \right. \] where $a:\mathbb R^2\to\mathbb R^+$ is…

Tangentially: it is not unreasonable to cite the invention of the printing press as a critical contributor to the 30 Years War and other political turmoil of the 15th & 16th century.
Not sure if the Papacy ever decreed printed matter in general anathema, but they did invent the whole structure of what was to be centuries of religious censorship in response to the disruption of their power in the Reformation being fueled & spread by the proliferation of printed matter.

ein Tross von anscheinend 1500 Radfahrer:innen bewegte sich gestern gute zwei Stunden lang auf der #CriticalMass durch die Stadt Stuttgart, auch durch zwei Tunnel, bei denen sonst ein explizites Fahrrad-Verbot herrscht.
Fotografieren ist auf dem #Tallbike aber immer noch nicht s…

Just Wing It: Optimal Estimation of Missing Mass in a Markovian Sequence
Ashwin Pananjady, Vidya Muthukumar, Andrew Thangaraj
https://arxiv.org/abs/2404.05819

Just Wing It: Optimal Estimation of Missing Mass in a Markovian Sequence
We study the problem of estimating the stationary mass -- also called the unigram mass -- that is missing from a single trajectory of a discrete-time, ergodic Markov chain. This problem has several applications -- for example, estimating the stationary missing mass is critical for accurately smoothing probability estimates in sequence models. While the classical Good--Turing estimator from the 1950s has appealing properties for i.i.d. data, it is known to be biased in the Markov setting, and ot…

@…
ihr schreibt hier, oben im hervorgehobenen Bereich, dass der Zubringer um 10 Uhr ab Kronenplatz startet. Unten im Text steht - vermutlich korrekt - 8 Uhr. Eventuell noch korrigieren?

Oh, toll, es sind schon Bilder von der gestrigen #CriticalMass #Waldshut online: https://criticalmass.in/waldshut/2…

This https://arxiv.org/abs/2403.13328 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Thermodynamics of charged black holes in Maxwell-dilaton-Massive gravity
Considering the nonminimal coupling of dilaton field to the massive graviton field in Maxwell-dilaton-Massive gravity, we obtain a class of analytical solutions of charged black holes, which are neither asymptotically flat nor (A)dS. The calculated thermodynamic quantities, such as mass, temperature and entropy, verify the valid of first law of black hole thermodynamics. Moreover, we further investigate the critical behaviors of these black holes in grand canonical ensemble and canonical ensemb…

Precise measurement of the $e^ e^-\to D_s^ D_s^-$ cross sections at center-of-mass energies from threshold to 4.95 GeV
BESIII Collaboration, et al.
https://arxiv.org/abs/2403.14998

Precise measurement of the $e^+e^-\to D_s^+D_s^-$ cross sections at center-of-mass energies from threshold to 4.95 GeV
Using the $e^+e^-$ collision data collected with the BESIII detector operating at the BEPCII collider, at center-of-mass energies from the threshold to $4.95$~GeV, we present precise measurements of the cross sections for the process $e^+e^-\to D_s^+D_s^-$ using a single tag method. The resulting cross section lineshape exhibits several new structures, thereby offering an input for coupled channel analysis and model tests, which are critical to understand vector charmonium-like states with mass…

Nonlinear, non-signaling Schr\"odinger equation
Tam\'as Geszti
https://arxiv.org/abs/2402.08757 https://arxiv.org/pdf/2402.0…

Nonlinear, non-signaling Schrödinger equation
A nonlinear extension of Schrödinger's wave equation is proposed that ensures non-signaling by keeping linear the evolution of \textit{coordinate-diagonal} elements of the density matrix. The equation contains a negative kinetic energy term that turns spreading of wave packets into its opposite: collapsing, as some effective mass $M$ grows beyond a universal critical mass, estimated to be about $μ= 2\cdot10^{-23}~$kg; then linear quantum kinetic energy gets negligible, which marks the quantum…

Fundamentals of Stars: Critical Looks at Mass-Luminosity Relations and Beyond
Z. Eker, F. Soydugan, S. Bilir
https://arxiv.org/abs/2402.07947 https://

Fundamentals of Stars: Critical Looks at Mass-Luminosity Relations and Beyond
Developments on various relations among stellar variables such as the main sequence empirical mass-luminosity (MLR), mass-radius (MRR) and mass-effective temperature (MTR) relations were reviewed. Conceptual changes in their understanding and usages were discussed. After its discovery, MLR was treated as one of the fundamental secrets of the cosmos. Differences between fundamental laws and statistical relations were used to understand long-term developments of MLR, MRR and MTR. Developments sho…

This https://arxiv.org/abs/2311.18211 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Analytic approach to astrometric perturbations of critical curves by substructures
Astrometric perturbations of critical curves in strong lens systems are thought to be one of the most promising probes of substructures down to small-mass scales. While a smooth mass distribution creates a symmetric geometry of critical curves with radii of curvature about the Einstein radius, substructures introduce small-scale distortions on critical curves, which can break the symmetry of gravitational lensing events near critical curves, such as highly magnified individual stars. We derive …

🇬🇧Demand flexibility modelling by 🐙Centre for Net Zero shows:
"EV flexibility can absorb over 15TWh of otherwise wasted wind and solar by 2035; similar levels of fossil fuel generation are prevented."
One of the key takeaways: make smart charging the default now

Whole-system modelling of future energy scenarios: domestic GB demand flexibility - Centre for Net Zero
Exploring the whole system benefits of domestic demand flexibility in Great Britain’s energy transition. A collaborative working paper, and a summary from Centre for Net Zero.

Universal formal asymptotics for localized oscillation of a discrete mass-spring-damper system of time-varying properties, embedded into a one-dimensional medium described by the telegraph equation with variable coefficients
Serge N. Gavrilov, Ilya O. Poroshin, Ekaterina V. Shishkina, Yulia A. Mochalova
https://arxiv.org/abs/240…

Universal formal asymptotics for localized oscillation of a discrete mass-spring-damper system of time-varying properties, embedded into a one-dimensional medium described by the telegraph equation with variable coefficients
We consider a quite general problem concerning a linear free oscillation of a discrete mass-spring-damper system. This discrete sub-system is embedded into a one-dimensional continuum medium described by the linear telegraph equation. In a particular case, the discrete sub-system can move along the continuum one at a sub-critical speed. Provided that the dissipation in both discrete and continuum sub-systems is absent, if parameters of the sub-systems are constants, under certain conditions (th…

This https://arxiv.org/abs/2301.08346 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

A critical survey of twisted spectral triples beyond the Standard Model
We review the applications of twisted spectral triples to the Standard Model. The initial motivation was to generate a scalar field, required to stabilise the electroweak vacuum and fit the Higgs mass, while respecting the first-order condition. Ultimately, it turns out that the truest interest of the twist lies in a new -- and unexpected -- field of 1-forms, which is related to the transition from Euclidean to Lorentzian signature.

Here's the plot for my collapse fiction novel:
The USD collapses after a critical mass of countries dump dollar reserves in protest of brutal US proxy wars, and is replaced by the Chinese Yuan as the global reserve currency.
Rather than a grand civil war, the US fractures into a number of regional govts. Saudi Arabia takes over AZ and NM for alfalfa production. Mexico takes the southern halves of CA and TX. The rest of the country becomes cheap labor for Japanese and European…

This https://arxiv.org/abs/2401.15341 has been replaced.
initial toot: https://mastoxiv.page/@a…

Observation of an Abrupt 3D-2D Morphological Transition in Thin Al Layers Grown by MBE on InGaAs surface
Among superconductor/semiconductor hybrid structures, in-situ aluminum (Al) grown on InGaAs/InAs is widely pursued for the experimental realization of Majorana Zero Mode quasiparticles. This is due to the high carrier mobility, low effective mass, and large Landé g-factor of InAs, coupled with the relatively high value of the in-plane critical magnetic field in thin Al films. However, growing a thin, continuous Al layer using the Molecular Beam Epitaxy (MBE) is challenging due to aluminum's hi…

This https://arxiv.org/abs/2404.07301 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

The Physical Origin of the Stellar Initial Mass Function
Stars are amongst the most fundamental structures of our Universe. They comprise most of the baryonic and luminous mass of galaxies, synthethise heavy elements, and injec\ t mass, momentum, and energy into the interstellar medium. They are also home to the planets. Since stellar properties are primarily decided by their mass, the so-called \ stellar initial mass function (IMF) is critical to the structuring of our Universe. We review the various physical processes, and theories which have been …

This https://arxiv.org/abs/2404.10083 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Multi-domain spectral method for self-force calculations
Second-order self-force calculations will be critical for modelling extreme-mass-ratio inspirals, and they are now known to have high accuracy even for binaries with mass ratios $\sim 1:10$. Many of the challenges facing these calculations are related to slow convergence of spherical-harmonic (or spheroidal harmonic) mode sums in a region containing the small companion. In this paper, we begin to develop a multi-domain framework that can evade those problems. Building on recent work by Osburn a…

Critical scaling for dense granular flow between parallel plates near jamming
Michio Otsuki, Kenta Hayashi, Kiwamu Yoshii
https://arxiv.org/abs/2403.00256 …

Critical scaling for dense granular flow between parallel plates near jamming
We numerically study the flow of dense granular materials between parallel plates driven by an external force. The granular materials form a jammed solid-like state when the external force is below a critical force, while they flow like fluids above the critical force. The transition is characterized by the mass flux. The critical force depends on the average packing fraction and the distance between the plates. The scaling laws for the critical force and the mass flux are predicted theoretical…

This https://arxiv.org/abs/2312.02893 has been replaced.
initial toot: https://mastoxiv.page/@a…

Effective mass and field-reinforced superconductivity in uranium compounds
A theory of strong coupling superconductivity in uranium compounds has been developed, based on electron-electron interaction through magnetic fluctuations described by frequency-dependent magnetic susceptibility. The magnetic field dependence of the electron effective mass is expressed through the field dependence of the magnetic susceptibility components. It is shown that the intensity of triplet pairing, and hence the critical temperature of the transition to the superconducting state, is al…

This https://arxiv.org/abs/2310.06898 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

The origin of supermassive black holes at cosmic dawn
We investigate the steady spherically symmetric accretion in the combined potential of a central black hole and a dark matter halo. For the halo, we consider a Hernquist and an NFW potential and calculate the critical points of the flow. We find that the trans-sonic solution to the centre is not possible without a black hole, whereas two types of trans-sonic solutions are possible in its presence. We also derive the mass accretion rate for a black hole at the centre of a dark matter halo. Our r…

Dispersive decay for the mass-critical nonlinear Schr\"odinger equation
Chenjie Fan, Rowan Killip, Monica Visan, Zehua Zhao
https://arxiv.org/abs/2403.09989

Dispersive decay for the mass-critical nonlinear Schrödinger equation
We prove dispersive decay, pointwise in time, for solutions to the mass-critical nonlinear Schrödinger equation in spatial dimensions $d=1,2,3$.

The Critical Mass Ratio for W UMa-type Contact Binary Systems
Bojan Arbutina, Surjit Wadhwa
https://arxiv.org/abs/2404.03821 https://…

The Critical Mass Ratio for W UMa-type Contact Binary Systems
Contact binaries are close binary systems in which both components fill their inner Roche lobes so that the stars are in direct contact and in potential mass and energy exchange. The most common such systems of low-mass are the so-called W UMa-type. In the last few years, there is a growing interest of the astronomical community in stellar mergers, primarily due to the detection of gravitational waves (mergers of black holes and neutron stars), but also because of an alternative model for type …

Effect of Uncorrelated On-site Scalar Potential, and Mass Disorder on Transport of Two-Dimensional Dirac Fermions
Arman Duha, Mario Borunda
https://arxiv.org/abs/2403.03914

Effect of Uncorrelated On-site Scalar Potential, and Mass Disorder on Transport of Two-Dimensional Dirac Fermions
We investigate the transport properties of massive Dirac fermions subjected to uncorrelated scalar potential disorder, and mass disorder. Using a finite difference method, the conductance is calculated for a wide variety of combinations of these two disorder strengths. By calculating the scaling of conductivity with system size we find that, depending on the combination, the system can have an insulating, scale invariant, and metallic behavior. We identify the critical values of these disorder …

Universal formal asymptotics for localized oscillation of a discrete mass-spring-damper system of time-varying properties, embedded into a one-dimensional medium described by the telegraph equation with variable coefficients
Serge N. Gavrilov, Ilya O. Poroshin, Ekaterina V. Shishkina, Yulia A. Mochalova
https://arxiv.org/abs/240…

Universal formal asymptotics for localized oscillation of a discrete mass-spring-damper system of time-varying properties, embedded into a one-dimensional medium described by the telegraph equation with variable coefficients
We consider a quite general problem concerning a linear free oscillation of a discrete mass-spring-damper system. This discrete sub-system is embedded into a one-dimensional continuum medium described by the linear telegraph equation. In a particular case, the discrete sub-system can move along the continuum one at a sub-critical speed. Provided that the dissipation in both discrete and continuum sub-systems is absent, if parameters of the sub-systems are constants, under certain conditions (th…

This https://arxiv.org/abs/2308.07380 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Disorder Operator and Rényi Entanglement Entropy of Symmetric Mass Generation
In recent years a consensus has gradually been reached that the previously proposed deconfined quantum critical point (DQCP) for spin-1/2 systems, an archetypal example of quantum phase transition beyond the classic Landau's paradigm, actually does not correspond to a true unitary conformal field theory (CFT). In this work we carefully investigate another type of quantum phase transition supposedly beyond the similar classic paradigm, the so called ``symmetric mass generation" (SMG) transition …

Here's the plot for my collapse fiction novel:
The USD collapses after a critical mass of countries dump dollar reserves in protest of brutal US proxy wars, and is replaced by the Chinese Yuan as the global reserve currency.
Rather than a grand civil war, the US fractures into a number of regional govts. Saudi Arabia takes over AZ and NM for alfalfa production. Mexico takes the southern halves of CA and TX. The rest of the country becomes cheap labor for Japanese and European…

Inspiral Time Probability Distribution for Two Black Holes Captured by Emitting Gravitational Radiation
Don N. Page
https://arxiv.org/abs/2403.10804 https:…

Inspiral Time Probability Distribution for Two Black Holes Captured by Emitting Gravitational Radiation
If two initially unbound black holes of masses M_1 and M_2, total mass M = M_1 + M_2, reduced mass mu = M_1 M_2/(M_1+M_2), and initial relative velocity v << c(4 mu/M) in otherwise empty space are captured into a bound orbit by emitting gravitational radiation, the inspiral time to coalescence increases monotonically to infinity as the impact parameter b approaches from below the critical impact parameter b_c = [340 pi G^7 M^6 mu/(3 c^5 v^9)]^{1/7} = [(85 pi/384)(4 mu/M)]^{1/7}(2GM/c^2)(v/c)^{-…

Optical and Transport Properties of Plasma Mixtures from Ab Initio Molecular Dynamics
Alexander J. White, Galen T. Craven, Vidushi Sharma, Lee A. Collins
https://arxiv.org/abs/2404.07800

Optical and Transport Properties of Plasma Mixtures from Ab Initio Molecular Dynamics
Predicting the charged particle transport properties of warm dense matter / hot dense plasma mixtures is a challenge for analytical models. High accuracy ab initio methods are more computationally expensive, but can provide critical insight by explicitly simulating mixtures. In this work, we investigate the transport properties and optical response of warm dense carbon-hydrogen mixtures at varying concentrations under either conserved electronic pressure or mass density at a constant temperatur…

Universality of pseudo-Goldstone damping near critical points
Yang-yang Tan, Yong-rui Chen, Wei-jie Fu, Wei-Jia Li
https://arxiv.org/abs/2403.03503 https:/…

Universality of pseudo-Goldstone damping near critical points
Recently, in studies of holographic models and hydrodynamics with spontaneous breaking of approximate symmetries, it has been proposed that the damping of pseudo-Goldstone modes at finite temperatures is universally constrained in the way that $Ω_φ/m_φ^2\simeq D_φ$ in the broken phase, where $Ω_φ$ and $m_φ $ are the relaxation rate at zero wavenumber and the mass of pseudo-Goldstones, $D_φ$ is the Goldstone diffusivity in the limit of purely spontaneous breaking. In this paper, we inves…

This https://arxiv.org/abs/2105.09879 has been replaced.
link: https://scholar.google.com/scholar?q=a

On the the critical exponent for the semilinear Euler-Poisson-Darboux-Tricomi equation with power nonlinearity
In this note, we derive a blow-up result for a semilinear generalized Tricomi equation with damping and mass terms having time-dependent coefficients. We consider these coefficients with critical decay rates. Due to this threshold nature of the time-dependent coefficients (both for the damping and for the mass), the multiplicative constants appearing in these lower-order terms strongly influence the value of the critical exponent, determining a competition between a Fujita-type exponent and a S…

This https://arxiv.org/abs/2402.08757 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Nonlinear, non-signaling Schrödinger equation
A nonlinear extension of Schrödinger's wave equation is proposed that ensures non-signaling by keeping linear the evolution of \textit{coordinate-diagonal} elements of the density matrix. The equation contains a negative kinetic energy term that turns spreading of wave packets into its opposite: collapsing, as some effective mass $M$ grows beyond a universal critical mass, estimated to be about $μ= 2\cdot10^{-23}~$kg; then linear quantum kinetic energy gets negligible, which marks the quantum…

This https://arxiv.org/abs/2301.09769 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Soliton Merger Rates and Enhanced Axion Dark Matter Decay
Solitons are observed to form in simulations of dark matter (DM) halos consisting of bosonic fields. We use the extended Press-Schechter formalism to compute the mass function of solitons, assuming various forms for the relationship between halo mass and soliton mass. We further provide a new calculation of the rate of soliton major mergers. Solitons composed of axion DM are unstable above a critical mass, and decay to either relativistic axions or photons, depending on the values of the coupli…

Effect of Uncorrelated On-site Scalar Potential, and Mass Disorder on Transport of Two-Dimensional Dirac Fermions
Arman Duha, Mario Borunda
https://arxiv.org/abs/2403.03914

Effect of Uncorrelated On-site Scalar Potential, and Mass Disorder on Transport of Two-Dimensional Dirac Fermions
We investigate the transport properties of massive Dirac fermions subjected to uncorrelated scalar potential disorder, and mass disorder. Using a finite difference method, the conductance is calculated for a wide variety of combinations of these two disorder strengths. By calculating the scaling of conductivity with system size we find that, depending on the combination, the system can have an insulating, scale invariant, and metallic behavior. We identify the critical values of these disorder …

Crystallographic dependence of Field Evaporation Energy Barrier in metals using Field Evaporation Energy Loss Spectroscopy mapping
Fran\c{c}ois Vurpillot (GPM), Constantinos Hatzoglou (NTNU), Benjamin Klaes (GPM), Loic Rousseau (GPM), Jean-Baptiste Maillet (GPM), Ivan Blum (GPM), Baptiste Gault, Alfred Cerezo
https://arxiv.org/a…

Crystallographic dependence of Field Evaporation Energy Barrier in metals using Field Evaporation Energy Loss Spectroscopy mapping
Atom probe tomography data is composed of a list of coordinates of the reconstructed atoms in the probed volume. The elemental identity of each atom is derived from time-of-flight mass spectrometry, with no local energetic or chemical information readily available within the mass spectrum. Here, we used a new data processing technique referred to as field evaporation energy loss spectroscopy (FEELS), which analyses the tails of mass peaks. FEELS was used to extract critical energetic parameters…

The true number density of massive galaxies in the early Universe revealed by JWST/MIRI
Tao Wang, Hanwen Sun, Luwenjia Zhou, Ke Xu, Cheng Cheng, Zhaozhou Li, Yangyao Chen, H. J. Mo, Avishai Dekel, Xianzhong Zheng, Zheng Cai, Tiacheng Yang, Y. -S. Dai, David Elbaz, J. -S. Huang
https://arxiv.org/abs/2403.02399 https://arxiv.org/pdf/2403.02399
arXiv:2403.02399v1 Announce Type: new
Abstract: One of the main challenges in galaxy formation that has emerged recently is the early assembly of massive galaxies. The observed number density and the maximum stellar mass ($M_{\star}$) of massive galaxies in the early Universe appear to be higher than model predictions, which may pose a serious problem to the LCDM cosmology. A major limitation in many previous studies is the large uncertainty in estimating $M_{\star}$ due to the lack of constraints in the rest-frame near-infrared part of the spectral energy distribution, which is critical to determining $M_{\star}$ accurately. Here we use data from a large JWST/MIRI survey in the PRIMER program to carry out a systematic analysis of massive galaxies at $z \sim 3-8$, leveraging photometric constraints at rest-frame $\gtrsim 1 \mu$m. We find a significant reduction in the number and mass densities of massive galaxies at $z > 5$ compared to earlier results that did not use the MIRI photometry. Within the standard $\Lambda$CDM cosmology, our results require a moderate increase in the baryon-to-star conversion efficiency ($\epsilon$) towards higher redshifts and higher $M_{\star}$. For the most massive galaxies at $z\sim 8$, the required $\epsilon$ is $\sim 0.3$, in comparison to $\epsilon \sim 0.14$ for typical low-redshift galaxies. Our findings are consistent with models assuming suppressed stellar feedback due to the high gas density and the associated short free-fall time expected for massive halos at high redshift.

This https://arxiv.org/abs/2305.19814 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Hairy Black Holes by Spontaneous Symmetry Breaking
We study hairy black hole solutions in Einstein(--Maxwell)--scalar--Gauss--Bonnet theory. The scalar coupling function includes quadratic and quartic terms, so the gravitational action has a U(1) symmetry. We argued that when the effective mass of the scalar field is at the critical value, the non-hairy black holes transform into hairy black holes in a symmetry-broken vacuum via spontaneous symmetry breaking. These hairy black holes are stable under scalar perturbations, and the Goldstone boson…

This https://arxiv.org/abs/2311.00125 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Correlation between the symmetry energy slope and the deconfinement phase transition
We study how the nuclear symmetry energy slope ($L$) can affect the hadron-quark phase transition and neutron star properties. We show that the main physical quantities as the critical chemical potential and pressure are strongly influenced by the symmetry energy slope. In extreme cases, the total amount of deconfined quarks can reach up to 99$\%$ of the hybrid star mass.

Crystallographic dependence of Field Evaporation Energy Barrier in metals using Field Evaporation Energy Loss Spectroscopy mapping
Fran\c{c}ois Vurpillot (GPM), Constantinos Hatzoglou (NTNU), Benjamin Klaes (GPM), Loic Rousseau (GPM), Jean-Baptiste Maillet (GPM), Ivan Blum (GPM), Baptiste Gault, Alfred Cerezo
https://arxiv.org/a…

Crystallographic dependence of Field Evaporation Energy Barrier in metals using Field Evaporation Energy Loss Spectroscopy mapping
Atom probe tomography data is composed of a list of coordinates of the reconstructed atoms in the probed volume. The elemental identity of each atom is derived from time-of-flight mass spectrometry, with no local energetic or chemical information readily available within the mass spectrum. Here, we used a new data processing technique referred to as field evaporation energy loss spectroscopy (FEELS), which analyses the tails of mass peaks. FEELS was used to extract critical energetic parameters…

This https://arxiv.org/abs/2404.02801 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

The Primordial Black Hole Formation -- Null Geodesic Correspondence
We provide evidence for a correspondence between the formation of primordial black holes and the stability of circular null geodesics around the collapsing perturbation. We first show that the critical threshold of the compaction function to form a black hole in radiation is well approximated by the critical threshold for the appearance of the first unstable circular orbit. We also show that the critical exponent in the scaling law of the primordial black hole mass close to the threshold is set…

This https://arxiv.org/abs/2312.02893 has been replaced.
initial toot: https://mastoxiv.page/@a…

Effective mass and field-reinforced superconductivity in uranium compounds
A theory of strong coupling superconductivity in uranium compounds has been developed, based on electron-electron interaction through magnetic fluctuations described by frequency-dependent magnetic susceptibility. The magnetic field dependence of the electron effective mass is expressed through the field dependence of the magnetic susceptibility components. It is shown that the intensity of triplet pairing, and hence the critical temperature of the transition to the superconducting state, is al…

Exploring Unique Quasinormal Modes of a Massive Scalar Field in Brane-World Scenarios
Antonina F. Zinhailo
https://arxiv.org/abs/2403.06867 https://…

Exploring Unique Quasinormal Modes of a Massive Scalar Field in Brane-World Scenarios
We compute precise values of quasinormal modes of a massive scalar field in the background of the Schwarzschild-like brane-localised black holes. It is shown that the quasinormal spectrum of the massive field differs qualitatively from that previously known for other black hole models, due to the presence of two kinds of modes: those whose damping rate vanishes as the mass of the field $μ$ increases up to some critical value, and those whose real oscillation frequency vanishes at a certain val…

This https://arxiv.org/abs/2404.02801 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

The Primordial Black Hole Formation -- Null Geodesic Correspondence
We provide evidence for a correspondence between the formation of primordial black holes and the stability of circular null geodesics around the collapsing perturbation. We first show that the critical threshold of the compaction function to form a black hole in radiation is well approximated by the critical threshold for the appearance of the first unstable circular orbit. We also show that the critical exponent in the scaling law of the primordial black hole mass close to the threshold is set…

This https://arxiv.org/abs/2403.03914 has been replaced.
initial toot: https://mastoxiv.page/@a…

Effect of Uncorrelated On-site Scalar Potential and Mass Disorder on Transport of Two-Dimensional Dirac Fermions
We investigate the transport properties of massive Dirac fermions subjected to uncorrelated scalar potential disorder, and mass disorder. Using a finite difference method, the conductance is calculated for a wide variety of combinations of these two disorder strengths. By calculating the scaling of conductivity with system size we find that, depending on the combination, the system can have an insulating, scale invariant, and metallic behavior. We identify the critical values of these disorder …

Two Positive Normalized Solutions on Star-shaped Bounded Domains to the Br\'ezis-Nirenberg Problem, I: Existence
Linjie Song, Wenming Zou
https://arxiv.org/abs/2404.11204

Two Positive Normalized Solutions on Star-shaped Bounded Domains to the Brézis-Nirenberg Problem, I: Existence
We develop a new framework to prove the existence of two positive solutions with prescribed mass on star-shaped bounded domains: one is the normalized ground state and another is of M-P type. We merely address the Sobolev critical cases since the Sobolev subcritical ones can be addressed by following similar arguments and are easier. Our framework is based on some important observations, that, to the best of our knowledge, have not appeared in previous literatures. Using these observations, we …

This https://arxiv.org/abs/2404.03522 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Experimental studies of black holes: status and future prospects
More than a century ago, Albert Einstein presented his general theory of gravitation (GR) to the Prussian Academy of Sciences. One of the predictions of the theory is that not only particles and objects with mass, but also the quanta of light, photons, are tied to the curvature of space-time, and thus to gravity. There must be a critical mass density, above which photons cannot escape. These are black holes (henceforth BH). It took fifty years after the theory was announced before possible cand…

Restricted Phase Space Thermodynamics of NED-AdS Black Holes
Mozib Bin Awal, Prabwal Phukon
https://arxiv.org/abs/2404.03261 https://…

Restricted Phase Space Thermodynamics of NED-AdS Black Holes
We study the Restricted Phase Space Thermodynamics (RPST) of magnetically charged by nonlinear electrodynamics (NED)-AdS black holes. The first law and the corresponding Euler relation is examined using the scaling properties. The Euler relation is found to hold automatically. We observe that the first order homogeneity of mass and the zeroth order homogeneity of the intensive variables is intact. We use numerical and graphical techniques to find the critical points of the thermodynamic quantit…

Multimessenger signals from compact axion star mergers
Liina Chung-Jukko, Eugene A. Lim, David J. E. Marsh
https://arxiv.org/abs/2403.03774 https://…

Multimessenger signals from compact axion star mergers
Axion dark matter can form stable, self-gravitating, and coherent configurations known as axion stars, which are rendered unstable above a critical mass by the Chern-Simons coupling to electromagnetism. We study, using numerical relativity, the merger and subsequent decay of compact axion stars. We show that two sub-critical stars can merge, and form a more massive, excited and critical star, which survives for a finite period before rapidly decaying via electromagnetic radiation. We find a ric…

3D scaling laws and projection effects in The300-NIKA2 Sunyaev-Zeldovich Large Program Twin Samples
A. Paliwal, W. Cui, D. de Andr\'es, M. De Petris, A. Ferragamo, C. Hanser, J. -F. Mac\'ias-P\'erez, F. Mayet, A. Moyer-Anin, M. Mu\~noz-Echeverr\'ia, L. Perotto, E. Rasia, G. Yepes
https://arxiv.org/abs/2404.03376<…

3D scaling laws and projection effects in The300-NIKA2 Sunyaev-Zeldovich Large Program Twin Samples
The abundance of galaxy clusters with mass and redshift is a well-known cosmological probe. The cluster mass is a key parameter for studies that aim to constrain cosmological parameters using galaxy clusters, making it critical to understand and properly account for the errors in its estimates. Subsequently, it becomes important to correctly calibrate scaling relations between observables like the integrated Compton parameter and the mass of the cluster. The NIKA2 Sunyaev-Zeldovich Large prog…

This https://arxiv.org/abs/2312.02782 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

HI content at cosmic noon -- a millimeter-wavelength perspective
In order to understand galaxy growth evolution, it is critical to constrain the evolution of its building block: gas. Mostly comprised by Hydrogen in its neutral (HI) and molecular (H2) phases, the latter is the one mostly directly associated to star-formation, while the neutral phase is considered the long-term gas reservoir. In this work, we make use of an empirical relation between dust emission at millimeter wavelengths and total gas mass in the inter-stellar medium (M_HI plus M_H2) in orde…

3D scaling laws and projection effects in The300-NIKA2 Sunyaev-Zeldovich Large Program Twin Samples
A. Paliwal, W. Cui, D. de Andr\'es, M. De Petris, A. Ferragamo, C. Hanser, J. -F. Mac\'ias-P\'erez, F. Mayet, A. Moyer-Anin, M. Mu\~noz-Echeverr\'ia, L. Perotto, E. Rasia, G. Yepes
https://arxiv.org/abs/2404.03376<…

3D scaling laws and projection effects in The300-NIKA2 Sunyaev-Zeldovich Large Program Twin Samples
The abundance of galaxy clusters with mass and redshift is a well-known cosmological probe. The cluster mass is a key parameter for studies that aim to constrain cosmological parameters using galaxy clusters, making it critical to understand and properly account for the errors in its estimates. Subsequently, it becomes important to correctly calibrate scaling relations between observables like the integrated Compton parameter and the mass of the cluster. The NIKA2 Sunyaev-Zeldovich Large prog…

The Primordial Black Hole Formation -- Null Geodesic Correspondence
Andrea Ianniccari, Antonio J. Iovino, Alex Kehagias, Davide Perrone, Antonio Riotto
https://arxiv.org/abs/2404.02801

The Primordial Black Hole Formation -- Null Geodesic Correspondence
We provide evidence for a correspondence between the formation of primordial black holes and the stability of circular null geodesics around the collapsing perturbation. We first show that the critical threshold of the compaction function to form a black hole in radiation is well approximated by the critical threshold for the appearance of the first unstable circular orbit. We also show that the critical exponent in the scaling law of the primordial black hole mass close to the threshold is set…

Experimental studies of black holes: status and future prospects
Reinhard Genzel, Frank Eisenhauer, Stefan Gillessen
https://arxiv.org/abs/2404.03522 https…

Experimental studies of black holes: status and future prospects
More than a century ago, Albert Einstein presented his general theory of gravitation (GR) to the Prussian Academy of Sciences. One of the predictions of the theory is that not only particles and objects with mass, but also the quanta of light, photons, are tied to the curvature of space-time, and thus to gravity. There must be a critical mass density, above which photons cannot escape. These are black holes (henceforth BH). It took fifty years after the theory was announced before possible cand…

ALMA-IMF XV: N$_2$H$^ $ kinematic analysis on the intermediate protocluster G353.41
R. H. \'Alvarez-Guti\'errez, A. M. Stutz, N. Sandoval-Garrido, F. Louvet, F. Motte, R. Galv\'an-Madrid, N. Cunningham, P. Sanhueza, M. Bonfand, S. Bontemps, A. Gusdorf, T. Csengeri, S. D. Reyes, J. Salinas, T. Baug, L. Bronfman, G. Busquet, D. J. D\'iaz-Gonz\'alez, M. Fernandez-Lopez, A. Guzm\'an, A. Koley, H. -L. Liu, F. A. Olguin, M. Valeille-Manet, F. Wyrowski

ALMA-IMF XV: N$_2$H$^+$ kinematic analysis on the intermediate protocluster G353.41
The ALMA-IMF Large Program provides multi-tracer observations of 15 Galactic massive protoclusters at matched sensitivity and spatial resolution. We focus on the dense gas kinematics of the G353.41 protocluster traced by N$_2$H$^+$ (1$-$0), with a critical density of $2\times10^5$~cm$^{-3}$, and spatial resolution $\sim$0.02~pc. G353.41, at a distance of 2~kpc, is embedded in a larger scale ($\sim$8~pc) filament and has a mass of 2500~M$_{\odot}$ within $1.3\times1.3$~pc$^2$. We extract the N$_…

This https://arxiv.org/abs/2310.06898 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

The origin of supermassive black holes at cosmic dawn
We investigate the steady spherically symmetric accretion in the combined potential of a central black hole and a dark matter halo. For the halo, we consider a Hernquist and an NFW potential and calculate the critical points of the flow. We find that the trans-sonic solution to the centre is not possible without a black hole, whereas two types of trans-sonic solutions are possible in its presence. We also derive the mass accretion rate for a black hole at the centre of a dark matter halo. Our r…