Article
Chemistry, Physical
Faezeh Khodabandehlou, Christian Maes, Karel Netocny
Summary: We discuss when and why the steady nonequilibrium heat capacity vanishes with temperature using general arguments and examples. The framework of Markov jump processes on finite connected graphs is used, where the condition of local detailed balance helps identify the heat fluxes, and the discreteness enables a nondegenerate stationary distribution at absolute zero. Additionally, a dynamic condition is needed for the nonequilibrium extension of the Third Law to ensure that the low-temperature dynamical activity and accessibility of the dominant state remain sufficiently high.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
A. McDonald, R. Hanai, A. A. Clerk
Summary: This paper demonstrates how generic non-Hermitian tight-binding lattice models can be achieved in an unconditional, quantum-mechanically consistent manner by constructing an appropriate open quantum system. It focuses on the quantum steady states of such models for both fermionic and bosonic systems, revealing their sensitivity to boundary conditions and the differences in steady-state density distribution between fermions and bosons.
Article
Optics
Paulo J. Paulino, Igor Lesanovsky, Federico Carollo
Summary: This paper presents a consistent thermodynamic description of open quantum cavity-atom systems and investigates the engine operation in both strong and weak coupling regimes. The study also discusses the power generation, energy-conversion efficiency, and the emergence of metastable behavior in a time-crystal engine.
Article
Engineering, Chemical
Xiaoshuang Chen, Elijah Thimsen
Summary: This study explores the stationary states of hydrogen-producing reactions in nonequilibrium plasmas, finding that the effluent composition is independent of the influent speciation and far from local equilibrium. The research underscores the importance of the recombination zone in plasmachemical processes.
Article
Engineering, Chemical
Elijah Thimsen
Summary: This work elucidates methods based on nonequilibrium thermodynamics to predict the stationary states of chemical reactions in nonequilibrium plasma and the limits for energy conversion efficiency, using CO2 splitting as an example reaction. It was found that the probability of observing reactants or products increases with the energy dissipated by that side of the reaction as heat through collisions with hot electrons.
Article
Optics
Alessandra Colla, Heinz-Peter Breuer
Summary: We develop a general theory for the thermodynamic behavior of open quantum systems beyond perturbation theory. Our approach is based on the exact time-local quantum master equation and the principle of minimal dissipation. This enables us to define work, heat, and entropy production, formulate the first and second laws of thermodynamics, and establish the connection between violations of the second law and quantum non-Markovianity.
Article
Physics, Multidisciplinary
Ahana Chakraborty, Rajdeep Sensarma
Summary: This study introduces a new field theoretic method for calculating Renyi entropy of interacting bosons in subsystems without using replica methods. The method can be applied to dynamics of open and closed quantum systems, and can determine the relationship between the initial state and final density matrix to predict the behavior of entropy over time. The approach also shows that the entropy in non-Markovian dynamics approaches a steady-state value with exponents determined by nonanalyticities of the system's environment.
PHYSICAL REVIEW LETTERS
(2021)
Article
Quantum Science & Technology
Gabriel T. Landi, Mauro Paternostro, Alessio Belenchia
Summary: We introduce a unified formalism for the thermodynamics description of continuously monitored systems. We demonstrate the relationship between conditional and unconditional entropy production, which measure the irreversibility of open system dynamics, through the Holevo quantity. This relationship can be further decomposed into information gain rate and loss rate, which determine the existence of informational steady states. Several examples are provided to illustrate the applicability of our framework.
Article
Physics, Fluids & Plasmas
Wenqi Lin, Yi-Hung Liao, Pik -Yin Lai, Yonggun Jun
Summary: In this experiment, we demonstrate that a Brownian gyrator of a colloidal particle confined by a two-dimensional harmonic potential with different temperatures on orthogonal axes can function as an autonomous heat engine, extracting work from an optical feedback trap-generated heat bath. The results confirm the theoretical predictions of thermodynamic currents and validate the possibility of achieving Carnot efficiency, as well as the trade-off relation between power and efficiency. Furthermore, the study shows that current fluctuations and entropy production rate remain constant in the steady state and their product near the Carnot efficiency approaches the lower bound of the thermodynamic uncertainty relation.
Article
Chemistry, Physical
Waldemar Kaiser, Veljko Jankovi, Nenad Vukmirovi, Alessio Gagliardi
Summary: This work presents a novel theoretical description of the nonequilibrium thermodynamics of charge separation in organic solar cells, quantifying for the first time the difference between nonequilibrium and equilibrium free energy profiles. The study reveals that charge separation in efficient OSCs proceeds via a cold but nonequilibrated pathway for delocalized electron-hole pairs at a small disorder, with large Gibbs entropy and initial electron-hole distance contributing to efficient charge separation.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Quantum Science & Technology
Irenee Frerot, Flavio Baccari, Antonio Acin
Summary: This paper introduces a flexible data-driven entanglement detection technique for uncharacterized quantum many-body states. The method relies on positive semidefinite conditions to reveal the key features of the data and discover new entanglement witnesses.
Article
Quantum Science & Technology
Xuanhua Wang, Jin Wang
Summary: In this study, quantum master equations beyond secular approximation are used to study the nonequilibrium thermodynamic cost of enhanced quantum metrology and quantum correlations. It is found that nonequilibrium conditions enhance quantum Fisher information and quantum correlations predominantly for weak tunneling scenarios. However, in the strong tunneling regimes, the quantum Fisher information and quantum correlations cannot be continuously boosted by higher thermodynamic costs and decay once the system is overburdened with extremely large energy currents.
QUANTUM INFORMATION PROCESSING
(2022)
Article
Multidisciplinary Sciences
Kamel Ourabah
Summary: This paper discusses the characteristics of nonequilibrium distributions in dispersion relations, commonly found in physical situations such as plasmas and self-gravitating systems. The best strategy for probing these distributions and unveiling their origins is to combine theoretical knowledge with experiments, including direct and indirect measurements related to dispersion relations.
SCIENTIFIC REPORTS
(2021)
Article
Mechanics
P. L. Garrido
Summary: The paper assumes that a mesoscopic scale system is described by a field evolving according to a Langevin equation with white noise. The stationary state distribution in the small noise limit is given by the quasipotential, which is treated as the unknown in a Hamilton-Jacobi equation. A theoretical scheme is presented using a canonical transformation to algebraically obtain the quasipotential for one-dimensional nonequilibrium models.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2021)
Article
Materials Science, Multidisciplinary
Haikuan Dong, Shiyun Xiong, Zheyong Fan, Ping Qian, Yanjing Su, Tapio Ala-Nissila
Summary: This paper proposes a method to interpret the apparent thermal conductivity obtained for finite systems using equilibrium molecular dynamics simulations (EMD) by comparing with nonequilibrium molecular dynamics (NEMD) simulations. The study shows that the maximum thermal conductivity obtained from EMD is equal to that obtained from NEMD, facilitating the use of EMD for thermal transport in finite samples in close correspondence to NEMD.
Article
Physics, Multidisciplinary
Tania Tome, Mario J. de Oliveira
BRAZILIAN JOURNAL OF PHYSICS
(2020)
Article
Physics, Multidisciplinary
Mario J. de Oliveira
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2020)
Article
Physics, Multidisciplinary
Tania Tome, Ana Tereza C. Silva, Mario J. de Oliveira
Summary: Vaccination can lead to the eradication of disease or flattening of the epidemic curve in deterministic models of epidemic spreading.
BRAZILIAN JOURNAL OF PHYSICS
(2021)
Article
Physics, Multidisciplinary
Mario J. de Oliveira
Summary: This paper examines the development of the concept of parametric invariance in different fields, focusing on its relation to entropy. The study shows that a slow parametric change leads to an adiabatic process, enabling the definition of entropy as a parametric invariance.
BRAZILIAN JOURNAL OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
Tania Tome, Mario J. de Oliveira
Summary: This study analyzed the impact of vaccination on the susceptible-infected-susceptible model for epidemic spreading, revealing that when the fraction of vaccinated individuals exceeds a critical value, the disease transmission eventually becomes extinct.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2022)
Article
Physics, Multidisciplinary
Tania Tome, Mario J. de Oliveira
Summary: We analyze a stochastic approach to population dynamics and show that the average number of individuals follows the same differential equations as the deterministic approach. Stochastic fluctuations and oscillations in population numbers are proportional to the square root of the population size. This approach predicts extinction of species with small populations due to stochastic fluctuations.
BRAZILIAN JOURNAL OF PHYSICS
(2023)
Article
Physics, Multidisciplinary
Dora Izzo, Mario J. de Oliveira
Summary: The chiral Potts model is investigated using the real space renormalization group method. The renormalization group scheme proposed by Niemeyer and Van Leeuwen is employed, with an approximation keeping only the first term in the cumulant expansion. Recurrence relations are derived for arbitrary number of states, renormalization factor, and lattice dimension. By using a renormalization factor b = 4, the phase diagram of the three-state model on a square lattice is obtained in terms of the chiral field and temperature, showing two regions: a disordered phase corresponding to paramagnetism, and a modulated phase with structures described by rational wave numbers.
BRAZILIAN JOURNAL OF PHYSICS
(2023)
Article
Physics, Multidisciplinary
Tania Tome, Mario J. de Oliveira
Summary: We use a canonical quantization procedure to obtain the quantum Fokker-Planck equation and develop a quantum stochastic thermodynamics based on this equation. The approach is applied to a system in contact with two reservoirs and allows us to determine the entropy production rate, heat flux, and particle flux. For noninteracting systems, the usual expression for the mean occupation number for bosons and fermions is obtained.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2023)
Article
Physics, Fluids & Plasmas
Tania Tome, Mario J. de Oliveira
Summary: This study focuses on closed systems of particles subject to stochastic forces, where the evolution equation for the probability density is derived to show the increase in entropy over time, indicating irreversible behavior and relaxation to equilibrium, contrasting with the Liouville equation which does not exhibit irreversibility in closed systems.
Article
Physics, Fluids & Plasmas
Mario J. de Oliveira, Dora Izzo
Article
Physics, Fluids & Plasmas
Mario J. de Oliveira
Article
Physics, Fluids & Plasmas
Bruno A. N. Akasaki, Mario J. de Oliveira, C. E. Fiore
Article
Physics, Fluids & Plasmas
Roberto da Silva, Mario J. de Oliveira, Tania Tome, J. R. Drugowich de Felicio
