Article
Mechanics
C. Argolo, V Tenorio, S. S. Albuquerque
Summary: By utilizing Monte Carlo simulation, the critical behavior of a three-dimensional stochastic lattice model describing a diffusive epidemic propagation process was studied, revealing an absorbing phase transition between different states. Three different diffusion regimes were explored, all showing second order transitions, contrary to predictions from field theory in first order approximation.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2021)
Article
Computer Science, Interdisciplinary Applications
Elad Steinberg, Shay Heizler
Summary: This study investigates the multi-dimensional radiative transfer phenomena using the ISMC scheme, including gray and multi-frequency problems. A new implicit scheme based on the semi-analog scheme is introduced and tested, showing the elimination of teleportation errors.
JOURNAL OF COMPUTATIONAL PHYSICS
(2022)
Article
Physics, Multidisciplinary
P. Sarkanych, Yu. Holovatch, R. Kenna, T. Yavors'kii
Summary: The Fukui-Todo algorithm is an important simulational approach for tackling critical phenomena in statistical physics. The partition-function-zero approach is fundamental for understanding such phenomena and measuring their properties accurately. By using a novel reweighting technique and zero-detection protocol, the obstacles caused by bypassing sample-by-sample energy computation in the algorithm are overcome, demonstrating its efficacy in simple iconic models with transitions of both first and second order.
Article
Mechanics
Georgios C. Boulougouris
Summary: In this work, a geometric representation of equilibrium and near equilibrium classical statistical mechanics is proposed, mapping equilibrium thermodynamic states onto Euclidian vectors. This representation allows for describing the relationship between equilibrium and out of equilibrium thermodynamic states, and discusses the connection to the second law of thermodynamics through K-L divergence.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2021)
Article
Physics, Fluids & Plasmas
M. K. Wen, L. Xiong, B. Zheng
Summary: Antiferromagnetic skyrmions are considered promising information carriers due to their attractive properties. The critical current and static and dynamic critical exponents of the depinning phase transition have been accurately determined through numerical simulation and theoretical analysis. Manipulating antiferromagnetic skyrmions and designing novel information processing devices can be greatly influenced by the sensitivity of the critical current to nonadiabatic coefficient.
Article
Mechanics
Federico Corberi, Leticia F. Cugliandolo, Marco Esposito, Onofrio Mazzarisi, Marco Picco
Summary: In this study, we investigated the kinetics of the two-dimensional q > 4-state Potts model after a shallow quench. The results showed that the system initially evolved as if it had been quenched to the critical temperature, with configurations exhibiting correlations indistinguishable from equilibrium. The decay from the metastable state occurred through nucleation of an average number k out of the q possible phases, with k logarithmically increasing with system size bounded by q. This unusual finite size dependence was a consequence of scaling properties underlying the nucleation phenomenon for these parameters.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2022)
Article
Multidisciplinary Sciences
Jan Kessler, Francesco Calcavecchia, Thomas D. Kuehne
Summary: Inspired by the universal approximation theorem and the widespread adoption of artificial neural network techniques, feed-forward neural networks are proposed as a general purpose trial wave function for quantum Monte Carlo simulations of continuous many-body systems. The accuracy of the trial wave functions was demonstrated by studying an exactly solvable model system of two trapped interacting particles and the hydrogen dimer. The whole many-body wave function can be represented by a neural network for simple model systems, while the antisymmetry condition of non-trivial fermionic systems is incorporated by means of a Slater determinant.
ADVANCED THEORY AND SIMULATIONS
(2021)
Article
Physics, Fluids & Plasmas
Nikolay A. Shumovskyi, Thomas J. Longo, Sergey Buldyrev, Mikhail A. Anisimov
Summary: In this study, the phenomenon of phase amplification in a fluid composed of two molecular species was investigated. By introducing a probability of Glauber-interconversion dynamics, it was found that the particle conservation law is broken, resulting in phase amplification. The speed of phase amplification was characterized through scaling laws based on the probability of Glauber dynamics, system size, and distance to the critical temperature of demixing.
Article
Physics, Fluids & Plasmas
Nino Lauber, Ondrej Tichacek, Krishnadev Narayanankutty, Daniele De Martino, Kepa Ruiz-Mirazo
Summary: Chemical reactions are usually studied assuming well-mixed substrates and catalysts throughout the system, but in reality, substrates and catalysts can undergo liquid-liquid phase separation to form condensates, which has significant effects on catalytic action. This study explores the impact of catalyst demixing on the kinetics of reaction pathways and finds that the formation of microenvironments due to phase separation can influence reaction times. The results have theoretical implications for mass action kinetics and provide insights into the role of phase separation in real metabolisms.
Article
Optics
Pil Saugmann, Jose Vargas, Yann Kiefer, Max Hachman, Raphael Eichberger, Andreas Hemmerich, Jonas Larson
Summary: In this study, we propose and experimentally explore a method for realizing frustrated lattice models using a Bose-Einstein condensate held in an optical square lattice. By introducing a small lattice distortion, an energy gap is opened and the lowest band splits into two. A nearly flat energy-momentum dispersion is achieved along the edge of the first Brillouin zone for both bands. Loading ultracold atoms into the excited band leads to the formation of a classically frustrated XY model. The experimental results show a complete loss of coherence in the momentum spectra when adiabatically tuning from the condensate regime to the regime of frustration, and the coherence is largely restored upon tuning back to the condensate regime. The agreement with model calculations is good.
Article
Physics, Multidisciplinary
M. Hubert, O. Trosman, Y. Collard, A. Sukhov, J. Harting, N. Vandewalle, A-S Smith
Summary: Through comparing theoretical modeling, simulations, and experiments, we demonstrate the existence of a swimming regime at low Reynolds numbers solely driven by the swimmer's inertia. By considering a dumbbell with asymmetry in coasting times and a nonreciprocal Stokesian flow, the scallop theorem is fulfilled at the mesoscopic scale.
PHYSICAL REVIEW LETTERS
(2021)
Article
Quantum Science & Technology
Matija Medvidovic, Giuseppe Carleo
Summary: In this study, a new method is introduced to simulate layered quantum circuits using a neural network parametrization, allowing for accurate Quantum Approximate Optimization Algorithm (QAOA) simulations with smaller computational resources.
NPJ QUANTUM INFORMATION
(2021)
Article
Computer Science, Interdisciplinary Applications
M. Hossein Gorji, Manuel Torrilhon
Summary: The diffusion limit of kinetic systems has garnered significant attention, particularly from the perspective of rarefied gas simulations. Fokker-Planck based kinetic models offer novel approximations of the Boltzmann equation, suitable for small/vanishing Knudsen numbers.
JOURNAL OF COMPUTATIONAL PHYSICS
(2021)
Article
Physics, Fluids & Plasmas
Peter Mann, V. Anne Smith, John B. O. Mitchell, Simon Dobson
Summary: This study explored the impact of clustering on the spread of pathogens in social networks, revealing that clustering reduces the coexistence threshold and outbreak size of the second strain while increasing its ability to spread.
Article
Computer Science, Interdisciplinary Applications
Russel Caflisch, Denis Silantyev, Yunan Yang
Summary: This article explores two frameworks for approximating the gradient of an objective function constrained by the nonlinear Boltzmann equation using the adjoint-state method, and proposes an adjoint DSMC method for Boltzmann-constrained optimization. The properties and connections of the two frameworks are analyzed, and several numerical examples are presented to demonstrate their accuracy and efficiency.
JOURNAL OF COMPUTATIONAL PHYSICS
(2021)
Article
Astronomy & Astrophysics
Pierfrancesco Di Cintio, Shamik Gupta, Lapo Casetti
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2018)
Review
Physics, Multidisciplinary
Stefano Gherardini, Shamik Gupta, Stefano Ruffo
CONTEMPORARY PHYSICS
(2018)
Article
Physics, Multidisciplinary
Debraj Das, Shamik Gupta
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2018)
Article
Physics, Multidisciplinary
Luca Giuggioli, Shamik Gupta, Matt Chase
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2019)
Article
Physics, Mathematical
David Metivier, Shamik Gupta
JOURNAL OF STATISTICAL PHYSICS
(2019)
Article
Mathematics, Applied
Debraj Das, Sayan Roy, Shamik Gupta
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2019)
Article
Mechanics
Debraj Das, Shamik Gupta
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2019)
Article
Physics, Multidisciplinary
David Metivier, Lucas Wetzel, Shamik Gupta
PHYSICAL REVIEW RESEARCH
(2020)
Article
Physics, Fluids & Plasmas
Mrinal Sarkar, Shamik Gupta
Article
Physics, Fluids & Plasmas
V. K. Chandrasekar, M. Manoranjani, Shamik Gupta
Article
Physics, Fluids & Plasmas
Yoshiyuki Y. Yamaguchi, Debraj Das, Shamik Gupta
Article
Physics, Fluids & Plasmas
Romain Bachelard, Nicola Piovella, Shamik Gupta
Correction
Physics, Multidisciplinary
Raphael Chetrite, Shamik Gupta, Izaak Neri, Edgar Roldan
Article
Physics, Multidisciplinary
Raphael Chetrite, Shamik Gupta, Izaak Neri, Edgar Roldan
Article
Physics, Fluids & Plasmas
Edagr Roldan, Shamik Gupta