Article
Mathematics, Applied
Mateusz Wisniewski, Jakub Spiechowicz
Summary: In this study, a paradigmatic model of nonequilibrium statistical physics is reinvestigated, involving an inertial Brownian particle in a symmetric periodic potential subjected to both a time-periodic force and a static bias. The researchers focus on the phenomenon of negative mobility, where the average velocity of the particle is opposite to the constant force acting on it. It is found that in the weak dissipation regime, thermal fluctuations induce negative mobility more frequently than in the case of stronger dissipation.
Article
Engineering, Multidisciplinary
F. M. Aldosari, Ahmad Almutlg, A. -B. A. Mohamed
Summary: This paper investigates the ability of atom-photon interactions in two two-level atomic systems to generate quantum information resources. By studying local quantum uncertainty (LQU), local quantum Fisher information (LQFI), and logarithmic negativity (LN), the authors explore the generation of atomic quantum correlations through the coupling of two moving atoms with a coherent field via a two-photon transition. The results show that the interaction parameters significantly affect the dynamics of LQU, LQFI, and LN, and the initial coherent state intensity enhances this effect. The cavity field half-wave number leads to the generation of atomic quantum correlations with regular oscillatory behavior, and the phenomenon of sudden death-birth of logarithmic negativity depends on the atom-cavity-atom interaction and the atomic location parameter.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Optics
Sreeja Loho Choudhury, Frank Grossmann
Summary: In this paper, we investigate the thermalization problem of a bistable quartic oscillator coupled with a finite number of harmonic oscillators. By using the method of coupled coherent states, we show that only a small number of oscillators with appropriately chosen frequencies, starting in their ground states, is enough to drive the bistable system close to its uncoupled ground state.
Article
Physics, Multidisciplinary
Eddy Collin, Ilya Golokolenov, Olivier Maillet, Laurent Saminadayar, Olivier Bourgeois
Summary: This study reports on the theoretical derivation of macroscopic thermal properties of an electrically insulating rod connected to two reservoirs. The theory predicts the temperature gradient and energy transport by linking motion amplitude cross-correlations between nearby mechanical modes. The theory relates the macroscopic clamping region where mixing occurs to the microscopic phonon mean-free-path.
NEW JOURNAL OF PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Mauricio Gomez Viloria, Philippe Ben-Abdallah, Riccardo Messina
Summary: This study shows that tunneling effects have a significant impact on the modeling of electronic heat flow and thermal flux during heat exchange between two metals at different temperatures.
Article
Chemistry, Analytical
Yan Wang, Xiaoyue Zhang, Xing Yang, Zhiji Wang, Yuefei Yan, Biao Du, Jiliang Zhang, Congsi Wang
Summary: This paper introduces a new embedded cooling or heat dissipation technology that effectively solves the heat dissipation problem in phased array antennas. By using the swept-back fishnet-embedded microchannel topology (SBFEMCT), the maximum temperature can be significantly reduced while maintaining good performance.
Article
Chemistry, Physical
Zhaoliang Wang, Lijun Jiao
Summary: This study compared the kinetic dissociation characteristics in different CO2 hydrate interfacial areas using molecular dynamic simulations and found that the dissociation rate was faster in the interfacial region with more carbon dioxide molecules. The mechanism of different kinetic behaviors at different dissociation interfaces was analyzed from the perspective of mass transfer, heat transfer, and energy transport.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Multidisciplinary Sciences
S. Abdel-Khalek, Hashim M. Alshehri, E. M. Khalil, A-S F. Obada
Summary: This study investigates the interaction of two qubits and an N-level atom based on su(2) Lie algebra, in the presence of qubit-qubit interaction and a dissipation term. The effects of these interactions on the system dynamics are discussed in detail, along with the calculation and analysis of observable operators, population inversion, linear entropy, and concurrence as a measure of entanglement. The roles of the number of levels, qubit-qubit coupling parameter, and dissipation rate on these quantities are explored, including the sudden birth and sudden death of entanglement phenomena with and without the dissipation term.
SCIENTIFIC REPORTS
(2021)
Article
Astronomy & Astrophysics
D. Gomez-Navarro, A. J. Mead, A. Aviles, A. de la Macorra
Summary: This study investigates the non-linear evolution of dark-sector energy densities suffering phase transitions in Lambda CDM cosmological models using N-body simulations, perturbation theory, and HMCODE. The research shows that nonlinearities tend to produce a second bump at smaller scales even when the primordial bump is located at linear scales, and this effect is understood within the halo model due to more efficient halo formation.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Blake A. Wilson, Steven O. Nielsen, Jaona H. Randrianalisoa, Zhenpeng Qin
Summary: This study investigates the heat transfer through nanoscale gold-water interfaces using atomistic molecular dynamics simulations. The researchers find that the thermal interface conductance increases linearly with interface curvature, regardless of gold wettability, and it increases nonlinearly with the applied heat flux under normal wetting. It remains constant under reduced wetting. The dependence on curvature may be linked to changes in interfacial water adsorption, while the temperature dependence may arise from shifts in the distribution of water vibrational states. This study advances our understanding of interface thermal conductance.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Review
Physics, Multidisciplinary
Marta Reina, Chams Gharib Ali Barura, Philippe Ben-Abdallah, Riccardo Messina
Summary: This article provides an overview of the current state of research on the coupling between heat carriers and thermal photons in near-field radiative heat exchange. The authors specifically examine the impact of conduction regime and solid shape on this coupling, and find that it can lead to significant changes in temperature profiles and heat flux. These findings have potential implications in nanoscale thermal management and energy conversion.
Article
Physics, Multidisciplinary
J. C. Flores
Summary: Dirac-Fermion systems with dissipation and an external force were studied, showing they have multiple equivalent stationary states characterized by configuration entropy. The entropy has a well-defined inflection point as a function of the external force in any spatial dimension, depicting two dissipative regimes or phases of unknown origin.
Article
Materials Science, Multidisciplinary
Ahmad Zeeshan, Munir Ahmad, Rahmat Ellahi, Sadiq M. Sait, Nasir Shehzad
Summary: The hydromagnetic flow of immiscible nanofluids between two parallel plates has been investigated. Two regions filled with different base fluids and nanoparticles were considered. Analytic solutions to the nonlinear coupled differential equations were obtained, and the effects of various parameters on the velocity and temperature profiles were illustrated graphically.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Energy & Fuels
Hanting Pan, Xiaoming Liu, Qiguo Yang, Hongtao Xu, Duo Xu
Summary: Phase change material (PCM) cooling is a good method for reducing excessive temperature of electronic devices. However, the low thermal conductivity of PCM affects the heat transfer capacity of a heat sink. This study investigates the effects of different pin-fin shapes, novel arrangements with triangular fins, and nanoparticles on the thermal performance of PCM heat sink using the 3D enthalpy-based multi-relaxation time lattice Boltzmann method. Results show that the PCM heat sink with triangular pin-fins has optimal thermal performance with the largest heat transmission area. Optimization research on triangular pin-fin arrangements shortens the full melt time by 14.3% and increases the heat dissipation power by up to 15.2% compared to the PCM heat sink with triangular pin-fins. Nanoparticles with a volume fraction of <0.1 are beneficial for balancing elevated heat dissipation capacity and reducing the latent heat duration of nanoenhanced PCM.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Physics, Multidisciplinary
Yuanran Zhu, Huan Lei, Changho Kim
Summary: In this paper, we derive a generalized second fluctuation-dissipation theorem (FDT) for stochastic dynamical systems in the steady state. We also show that the classical second FDT is valid even when the system is highly degenerate. These theoretical results enable the construction of a data-driven nanoscale fluctuating heat conduction model, which yields better predictions for systems far from equilibrium.
Article
Physics, Multidisciplinary
Luciano C. Lapas, Rafael Morgado, Andre L. A. Penna, Fernando A. Oliveira
ACTA PHYSICA POLONICA B
(2015)
Article
Chemistry, Physical
Luciano C. Lapas, Rogelma M. S. Ferreira, J. Miguel Rubi, Fernando A. Oliveira
JOURNAL OF CHEMICAL PHYSICS
(2015)
Article
Physics, Multidisciplinary
Ivan Latella, Agustin Perez-Madrid, Luciano C. Lapas, J. Miguel Rubi
Article
Physics, Multidisciplinary
Luciano C. Lapas, Agustin Perez-Madrid, J. Miguel Rubi
PHYSICAL REVIEW LETTERS
(2016)
Article
Chemistry, Physical
Agustin Perez-Madrid, Luciano C. Lapas, J. Miguel Rubi
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES
(2017)
Article
Physics, Multidisciplinary
R. M. S. Ferreira, L. C. Lapas, F. A. Oliveira
ACTA PHYSICA POLONICA B
(2013)
Article
Physics, Multidisciplinary
L. S. F. Olavo, L. C. Lapas, A. Figueiredo
Article
Physics, Applied
Ivan Latella, Agustin Perez-Madrid, Luciano C. Lapas, J. Miguel Rubi
JOURNAL OF APPLIED PHYSICS
(2014)
Article
Thermodynamics
Agustin Perez-Madrid, J. Miguel Rubi, Luciano C. Lapas
JOURNAL OF NON-EQUILIBRIUM THERMODYNAMICS
(2010)
Article
Multidisciplinary Sciences
Agustin Perez-Madrid, Luciano C. Lapas, J. Miguel Rubi
Article
Physics, Multidisciplinary
Agustin Perez-Madrid, Luciano C. Lapas, J. Miguel Rubi
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2019)
Review
Physics, Multidisciplinary
Fernando A. Oliveira, Rogelma M. S. Ferreira, Luciano C. Lapas, Mendeli H. Vainstein
FRONTIERS IN PHYSICS
(2019)
Proceedings Paper
Physics, Applied
Luciano C. Lapas, J. Miguel Rubi, Fernando A. Oliveira
NON-EQUILIBRIUM STATISTICAL PHYSICS TODAY
(2011)
Article
Physics, Multidisciplinary
Mendeli H. Vainstein, Luciano C. Lapas, Fernando A. Oliveira
ACTA PHYSICA POLONICA B
(2008)
