Review
Physics, Multidisciplinary
Jiahao Yang, Xiao Wang, Jianda Wu
Summary: This article explores the application of the one-dimensional spin-1/2 Heisenberg-Ising model in quantum many-body systems. It introduces a method based on octahedral group theory to derive the low-energy effective Hamiltonian for Co-based materials. The one-dimensional spin-1/2 Heisenberg-Ising model is obtained by applying this analysis to quasi-one-dimensional antiferromagnetic materials BaCo2V2O8 and SrCo2V2O8. The article then reviews the theoretical progress and recent experimental realizations of various novel magnetic excitations and emergent physics in this model.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2023)
Article
Physics, Multidisciplinary
Manish K. Sahai, A. K. Bakshi
Summary: This research investigates the structure and dynamics of interfaces in a three-dimensional Ising model on a simple cubic lattice. The study finds that for small V-f values, the magnetization interface generated by an external field is pinned to the field interface, but it detaches as V-f increases. Additionally, in the two-dimensional Ising model, there is a staircase-like relationship between the orientation of the field interface and the most probable local slope of the magnetization interface. In the three-dimensional model, this relationship is manifested as patches in graphical representation. The effect of V-f on the patch structure is also examined.
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
(2022)
Article
Physics, Multidisciplinary
Francisco Sastre
Summary: In this study, a new numerical method was proposed to evaluate the critical point, susceptibility critical exponent, and correlation length critical exponent of the three dimensional Ising model without external field. The results are in good agreement with previously reported values.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2021)
Article
Physics, Fluids & Plasmas
Pranay Bimal Sampat, Ananya Verma, Riya Gupta, Shradha Mishra
Summary: This study investigates the evolution of two-dimensional Ising spins through reinforcement learning, analyzing their state, action, and reward. It reveals a phase transition from ordered to disordered state at varying temperatures, and calculates the critical exponents and temperature associated with this transition.
Article
Physics, Multidisciplinary
Massimo Ostilli, Carlo Presilla
Summary: We studied the ground state of spinless electrons interacting through a screened Coulomb potential in a lattice ring and found a first-order quantum phase transition. The critical value r(sc) and its lower and upper bounds are determined analytically, with Monte Carlo simulations estimating r(sc) to be around 2.3 at certain lattice parameters. Removal of screening leads r(sc) to tend towards zero, contrasting with the smooth crossover seen in unscreened Coulomb potential cases.
PHYSICAL REVIEW LETTERS
(2021)
Article
Mathematics
Zhidong Zhang
Summary: The common feature for a nontrivial hard problem is the existence of nontrivial topological structures, non-planarity graphs, nonlocalities, or long-range spin entanglements in a model system with randomness. In this work, the relation between a spin-glass three-dimensional (3D) Ising model MSGI3D with the lattice size N = mnl and the K-SAT problems is investigated in detail. It is found that the spin-glass 3D Ising model can be mapped to a K-SAT problem by proving the equivalence between the absolute minimum core (AMC) model and the K-SAT problem for K = 3.
Article
Materials Science, Multidisciplinary
Nicolas di Scala, Nour El Islam Belmouri, Miguel Angel Paez Espejo, Kamel Boukheddaden
Summary: A three-dimensional electroelastic model is developed to describe the volume changes in spin-crossover materials during the transition between low and high spin states. The model uses a rectangular parallelepiped lattice with cubic symmetry and simulates the spin-crossover behavior using two-states fictitious spins coupled by springs. Parallel simulations are implemented using CUDA programming, and the interplay between electronic and structural aspects of the transformations is analyzed in relation to the model parameters.
Article
Multidisciplinary Sciences
Yuanzhe Li, Pengpeng Bai, Hui Cao, Lvzhou Li, Xinxin Li, Xin Hou, Jingbo Fang, Jingyang Li, Yonggang Meng, Liran Ma, Yu Tian
Summary: This study demonstrates a method based on stereo vision to measure three-dimensional traction stress with high spatial and temporal resolution. The method can be applied in various fields such as biology, physics, and robotics, and has important implications for related applications.
Article
Multidisciplinary Sciences
Degang Zhang
Summary: The exact solution of the three-dimensional Ising model in a zero external field is achieved using operator algebras, similar to Onsager's approach in two dimensions. The partition function of a simple cubic crystal with periodic and screw boundary conditions is rigorously calculated, with an integral replacing a sum in the formula in the thermodynamic limit. Critical temperatures for order-disorder transitions in the infinite crystal along three axis directions are determined, along with analytical expressions for internal energy and specific heat.
Article
Environmental Sciences
Runcheng Fang, Afzaal Nadeem Mohammed, Jagjit Singh Yadav, Jun Wang
Summary: This study investigated the cytotoxicity of ultrafine particles emitted from a desktop 3D printer using three different filaments. The results showed that ABS filament had the most significant particle emission and caution should be exercised when operating multiple printers and filament combinations in poorly ventilated spaces.
Article
Materials Science, Multidisciplinary
Francesca De Franco, Ettore Vicari
Summary: We analyze the effects of symmetry-breaking perturbations in the out-of-equilibrium quantum dynamics of many-body systems in the context of continuous quantum transitions. We find that the dynamics of observables exhibit a finite-size scaling behavior, which is determined by the interplay between the timescale of the parameter variations, the size of the system, and the strength of the symmetry-breaking perturbations. Additionally, we predict asymptotic power-law suppressions of nonadiabatic behaviors in the adiabatic limits based on scaling arguments.
Article
Materials Science, Multidisciplinary
Catherine Cazelles, Yogendra Singh, Jorge Linares, Pierre-Richard Dahoo, Kamel Boukheddaden
Summary: Coordination iron (II) compounds are used to simulate switching properties between low spin and high-spin states in spin-crossover materials. A local mean-field approach is proposed to study SCO nano/micro-particles, revealing a three-step switching under temperature effect and a two-step transition under pressure effect. The distinctions among contributions of molecules at different locations are considered in this study.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Energy & Fuels
Jin Wang, Xiaoke Ku, Zhiwei Liu
Summary: A three-dimensional thermally thick model is established to simulate the pyrolysis process of biomass particles, considering intra-particle heat transfer, biomass composition evolution, and particle deformation. The model captures the evolution histories of particle internal temperature, mass loss, morphology, and composition, as well as the distributions and variations of gas properties. The influences of operation temperature, particle shape, and particle aspect ratio are explored, revealing their effects on mass loss, gas release, internal gas velocity, and compressive stress.
Article
Astronomy & Astrophysics
P. A. Gonzalez, Marco Olivares, Eleftherios Papantonopoulos, Yerko Vasquez
Summary: The study reveals that the Lorentz-violating version of the BTZ black hole has a richer geodesic structure, allowing for both planetary and circular orbits which are not possible in the standard BTZ background.
Article
Physics, Multidisciplinary
Haiyuan Zou, Yi Cui, Xiao Wang, Z. Zhang, J. Yang, G. Xu, A. Okutani, M. Hagiwara, M. Matsuda, G. Wang, Giuseppe Mussardo, K. Hodsagi, M. Kormos, Zhangzhen He, S. Kimura, Rong Yu, Weiqiang Yu, Jie Ma, Jianda Wu
Summary: The study presents V-51 NMR and inelastic neutron scattering (INS) measurements on the quasi-1D antiferromagnet BaCo2V2O8 under transverse field. It reveals a 1D quantum critical point (QCP) at H-c(1D) approximately 4.7 T and provides an unambiguous experimental realization of the massive E-8 phase in the compound. The results offer a new experimental route for exploring the dynamics of quantum integrable systems and physics beyond integrability.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Gesualdo Delfino, Youness Diouane, Noel Lamsen
Summary: The Lebwohl-Lasher model investigates the isotropic-nematic transition in liquid crystals, particularly in two dimensions where there is a conjecture of a topological transition leading to a nematic phase with quasi-long-range order. By using scale invariant scattering theory to determine renormalization group fixed points, the model for N = 3 is obtained. For N > 2, the absence of quasi-long-range order and the presence of a zero temperature critical point in the universality class of the O(N(N + 1)/2 - 1) model are demonstrated.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2021)
Article
Physics, Multidisciplinary
Walter Selke
Summary: Using Monte Carlo simulations, this study investigates the finite-size effects of interfacial properties in the rough phase of the Ising model on a cubic lattice with L x L x R sites. Particularly, it focuses on the magnetization profiles perpendicular to the flat interface of size L x R, with comparisons made to predictions of standard capillary-wave theory and a field theory based on effective string actions for L = infinity.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2021)
Review
Physics, Condensed Matter
Gesualdo Delfino
Summary: This article reviews recent progress achieved by implementing conformal invariance within the particle description of field theory, which yields exact unitarity equations classifying critical points with a given symmetry. The study also reveals analytical mechanisms allowing for the superuniversality of some critical exponents.
EUROPEAN PHYSICAL JOURNAL B
(2021)
Article
Physics, Multidisciplinary
Volker Dohm, Stefan Wessel, Benedikt Kalthoff, Walter Selke
Summary: Researchers have verified recent analytic predictions derived from anisotropic phi(4) theory and conformal field theory regarding the critical free energy amplitude of finite anisotropic systems in the two-dimensional Ising universality class through high-precision Monte Carlo simulations, finding remarkable agreement between the experimental data and the theoretical predictions. This study supports the validity of multiparameter universality and refutes the validity of two-scale-factor universality, while also comparing the results with exact results in the three-dimensional phi(4) model with planar anisotropy and briefly discussing the critical Casimir amplitude.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2021)
Article
Mechanics
Alessio Squarcini, Antonio Tinti
Summary: In this study, phase separation of the two-dimensional Ising model on a strip in the near-critical region was investigated. Within the field theory framework, exact analytic results for certain two- and three-point correlation functions of the order parameter field were found. Accurate Monte Carlo simulations confirmed the analytic results for order parameter correlations, energy density profile, subleading corrections, and passage probability density of the interface.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2021)
Article
Mechanics
Youness Diouane, Noel Lamsen, Gesualdo Delfino
Summary: In this study, we used scale invariant scattering theory to investigate the exact equations determining the renormalization group fixed points of the two-dimensional CP (N-1) model. We found that the solution space of this model reduces to that of the O(N(2)-1) model under specific conditions, and explained the zero temperature critical point. Additionally, for N < 2, the solution space becomes larger than that of the O(N(2)-1) model, with the emergence of new branches of fixed points that are relevant for criticality in gases of intersecting loops.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2022)
Article
Physics, Multidisciplinary
Alessio Squarcini, Alexandre Solon, Gleb Oshanin
Summary: In this study, we analytically investigate the spectral density of active Brownian motion (BM) and reveal its distinctive features compared to its passive counterpart. The spectral content of individual trajectories is sufficient to distinguish between the active and passive classes.
NEW JOURNAL OF PHYSICS
(2022)
Article
Physics, Particles & Fields
Gesualdo Delfino, Marianna Sorba
Summary: This study provides analytical results for the time evolution of local observables in systems undergoing quantum quenches in d spatial dimensions. It shows that undamped oscillations occur when the quench includes single-quasiparticle modes and the observable couples to those modes in homogeneous systems. In the general case where the quench is performed in a subregion of the d-dimensional space, the time evolution occurs inside a light cone spreading away from the boundary of the quenched region as time increases.
Article
Physics, Multidisciplinary
Alessio Squarcini, Jose M. Romero-Enrique, Andrew O. Parry
Summary: This study determines the Casimir contribution in the interfacial model of three-dimensional wetting, which changes the interpretation of fluctuation effects and impacts the critical singularities and nonuniversality in wetting transitions.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Alessio Squarcini, Enzo Marinari, Gleb Oshanin, Luca Peliti, Lamberto Rondoni
Summary: We discuss the statistical properties of the single-trajectory power spectral density of a one-dimensional real-valued centered Gaussian process. Our findings reveal that the fluctuations of the power spectral density exceed its average value, suggesting a potential issue with using the average to describe the behavior of these processes. Furthermore, we evaluate the typical behavior of the power spectral density and find significant deviations from the average in most cases.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2022)
Article
Physics, Multidisciplinary
Alessio Squarcini, Enzo Marinari, Gleb Oshanin, Luca Peliti, Lamberto Rondoni
Summary: This study investigates the stochastic behavior of the single-trajectory spectral density S(omega,T) of various Gaussian stochastic processes, such as Brownian motion, Ornstein-Uhlenbeck process, Brownian gyrator model, and fractional Brownian motion, in terms of frequency w and observation time T. The variance and frequency-frequency correlation of S(omega,T) are evaluated for different values of omega. The results demonstrate that these properties exhibit different behaviors for different physical cases, thus serving as a sensitive probe to distinguish between different types of random motion. These findings are of great importance in the analysis of experimental and numerical data.
NEW JOURNAL OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
Alessio Squarcini, Alexandre Solon, Pascal Viot, Gleb Oshanin
Summary: When a physical system evolves in a thermal bath at a constant temperature, it reaches an equilibrium state with independent properties. However, when driven out of equilibrium, the system reaches a steady-state with properties that depend on the dynamics details. This study investigates the dependence of the steady state on driving noise and energy dissipation using a minimal model of a two-dimensional nano-machine called the Brownian gyrator.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2022)
Article
Mechanics
Alessio Squarcini, Antonio Tinti
Summary: We compare the results obtained from Monte Carlo simulations with the Ising model and the exact field theory of phase separation in two dimensions for a droplet interface pinned on a flat wall. The simulations confirm the theoretical predictions for the interface structure effects, resolving a long-standing discrepancy between simulations and theory for the order parameter profile. The results also establish the long-ranged decay of interfacial correlations parallel to the interface.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2023)
Article
Chemistry, Physical
A. Squarcini, J. M. Romero-Enrique, A. O. Parry
Summary: This article investigates the renormalisation group theory of critical and tri-critical wetting transitions in three-dimensional systems, and points out that previous studies have overlooked the entropic contribution to the binding potential. The inclusion of this contribution significantly improves the predictions for critical singularities.
Article
Physics, Particles & Fields
Alessio Squarcini, Antonio Tinti
Summary: In this study, we investigate near-critical two-dimensional statistical systems with phase coexistence on the half plane, leading to the formation of a droplet separating the coexisting phases under specific boundary conditions. By utilizing the low-energy properties of two-dimensional field theories, exact analytical results for the one- and two-point correlation functions of both the energy density and order parameter fields are derived. Furthermore, the subleading finite-size corrections are computed and explained in the context of a precise probabilistic framework characterizing interfacial fluctuations as a probability density of a Brownian excursion. The analysis of order parameter correlations reveals the long-ranged nature of interfacial correlations and their confinement within the interfacial region. Moreover, the analysis is extended to momentum space using the concept of interface structure factor, which is also generalized to systems bounded by a flat wall, considering the presence of the wall and its associated entropic repulsion.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Bogdan Damski
Summary: In this paper, we discuss the dynamics of field configurations in the Proca theory of the real massive vector field, specifically focusing on a certain class of electric (magnetic) dipole-charged states. We construct these states to ensure that the long-distance structure of the mean electromagnetic field is initially set by the formula describing the electromagnetic field of the electric (magnetic) dipole. We analyze the evolution of this mean electromagnetic field over time and observe the phenomena of harmonic oscillations of the electric (magnetic) dipole moment far from the center of the initial field configuration, as well as the emergence of a spherical shock wave propagating at the speed of light near the center. Additionally, we discover a unique axisymmetric mean electric field configuration accompanying the mean magnetic field in magnetic dipole-charged states.
Article
Physics, Particles & Fields
Brett McInnes
Summary: The time-dependence of AdS black hole interior geometries poses challenges to holographic duality and the traversability of wormholes. Quantum circuit complexity of strongly coupled matter can address the first challenge. Data from a phenomenological model show an upper bound on the complexity growth rate, which becomes stricter with the addition of angular momentum. The slowing of black hole interior dynamics at high specific angular momentum also occurs.
Article
Physics, Particles & Fields
M. Beccaria, S. Giombi, A. A. Tseytlin
Summary: This article investigates the superconformal index Z of the 6d (2,0) theory on S5 x S1 and describes it using the quantum M2 brane theory in the large N limit. By studying M2 branes in a twisted product of thermal AdS7 and S4, the leading non-perturbative term at large N is shown to be reproduced by the 1-loop partition function of an instanton M2 brane wrapped on S1 x S2 with S2 c S4. Similarly, the partition function of a defect M2 brane wrapped on thermal AdS3 c AdS7 reproduces the BPS Wilson loop expectation value in the (2,0) theory. The article also comments on the analogy of these results with similar computations in the quantum M2 brane partition function in AdS4 x S7/DOUBLE-STRUCK CAPITAL Zk, which reproduced the corresponding localization expressions in the ABJM 3d gauge theory.
Article
Physics, Particles & Fields
Carlos Silva
Summary: This paper explores the nature of spacetime in quantum gravity based on a new version of the holographic principle that establishes a connection between string theory and polymer holonomy structures. The research findings suggest that, for this relationship to hold, spacetime must be perceived as emerging from a fundamental structure with degrees of freedom corresponding to quantum correlations only.
Article
Physics, Particles & Fields
A. Senol, H. Denizli, C. Helveci
Summary: This study investigates new physics using a Monte Carlo method, and the results show stronger limitations on anomalous quartic gauge couplings compared to previous experiments.
