Article
Physics, Multidisciplinary
Paul W. Fontana
Summary: Maxwell's demon is a classic thought experiment that paradoxically violates the second law of thermodynamics. With advancements in nanomachinery, this experiment has become increasingly important in practical applications. Existing explanations fail to resolve this paradox, necessitating the proposal of a purely mechanical solution.
Article
Mechanics
Aradhana Kumari, Rahul Marathe, Sourabh Lahiri
Summary: Recent studies have shown that the concatenation of simple heat engines may result in non-monotonic variations in efficiency and power. In this study, we investigate the effect of concatenating two stochastic heat engines with trapped colloidal particles. We find non-trivial effects and enhanced power output when the trap strength varies linearly with time.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2023)
Article
Physics, Multidisciplinary
Santiago Hernandez-Gomez, Nicolas Staudenmaier, Michele Campisi, Nicole Fabbri
Summary: The experiment demonstrated the validity of quantum fluctuation relations in a driven open quantum system, addressing the challenge of distinguishing work and heat.
NEW JOURNAL OF PHYSICS
(2021)
Article
Quantum Science & Technology
Sourabh Lahiri, Subhashish Banerjee, A. M. Jayannavar
Summary: Work fluctuation theorems are significant achievements in nonequilibrium Statistical Physics, with recent interest in quantum regimes with generalized measurements. Studies show that in the framework of generalized measurements, the original form of the Jarzynski equality is not exact, but deviations are small and can deduce an approximate effective temperature of the thermal bath. In the limit of projective measurements, the exact form of work fluctuation theorems is recovered.
QUANTUM INFORMATION PROCESSING
(2021)
Article
Physics, Fluids & Plasmas
Sandipan Mohanta, Sushant Saryal, Bijay Kumar Agarwalla
Summary: We demonstrate a hierarchy in the relative fluctuation of currents for cold, hot, and work terminals in steady-state autonomous absorption refrigerators. This hierarchy leads to a bound on cooling efficiency that is tighter than previously obtained bounds.
Article
Physics, Multidisciplinary
Sungguen Ryu, Rosa Lopez, Raul Toral
Summary: Researchers introduce a robust Maxwell demon that can generate many-body entanglement against bit-flip noises, leading to quantum advantage. They utilize the voter model protocol and derive upper bounds for entropy reduction and work extraction rates. These findings suggest that many-body entanglement stabilization and work extraction are possible under certain conditions.
NEW JOURNAL OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
Giovanni Chesi, Chiara Macchiavello, Massimiliano Federico Sacchi
Summary: This study examines work fluctuations in ergotropic heat engines, focusing on two-stroke quantum Otto engines. The research explores optimal unitary strokes for extracting maximum work from quantum systems at different temperatures. By analyzing temperature and frequency values, three types of optimal unitary strokes are identified. The study also highlights the impact of these findings on thermodynamic uncertainty relations.
Article
Physics, Multidisciplinary
Tong Fu, Jianying Du, Shanhe Su, Guozhen Su, Jincan Chen
Summary: A thermodynamic pump driven by Maxwell's demon is proposed in the study, considering the actual equivalent circuit model of three quantum dots with Coulomb coupling. The demon generates information that drives mass or heat transfer in the pump, allowing it to function without energy input. This system is shown to not violate the second law of thermodynamics.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Physics, Fluids & Plasmas
Debankur Bhattacharyya, Christopher Jarzynski
Summary: This study presents a simple strategy for constructing an information ratchet or memory-tape model of Maxwell's demon by converting a feedback-controlled model. The underlying network structure of the original model is used to design a set of bit interaction rules for the information ratchet. The new model is analytically solved in the limit of long interaction times and semianalytical phase diagrams of operational modes are obtained for finite-time interactions. Stochastic simulations are conducted to verify the theoretical results.
Article
Quantum Science & Technology
Guilherme L. Zanin, Michael Antesberger, Maxime J. Jacquet, Paulo H. Souto Ribeiro, Lee A. Rozema, Philip Walther
Summary: Maxwell's Demon is at the heart of the relationship between quantum information processing and thermodynamics; photonic experiments offer great potential for exploring new regimes in quantum thermodynamics.
Article
Physics, Multidisciplinary
Timo Kerremans, Peter Samuelsson, Patrick P. Potts
Summary: Fluctuations of thermodynamic observables are not considered in traditional laws, but they contain relevant information. We show that the first law of thermodynamics may break down in the presence of quantum fluctuations, due to constraints imposed by quantum mechanics on the knowledge of heat and work.
Article
Multidisciplinary Sciences
Yuqing Qiu, Michael Nguyen, Glen M. Hocky, Aaron R. Dinner, Suriyanarayanan Vaikuntanathan
Summary: Understanding the impact of nonequilibrium driving on self organization is essential for predictive descriptions of biological systems, yet hindered by complexity. This study constructs a minimal model based on recent experiments involving actin filament growth rates to show the dynamics of a growing actin bundle are constrained by thermodynamic considerations, underscoring the importance of correlations between molecular fluxes and offering insights for estimating microscopic driving forces from microscopy experiments.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Physics, Multidisciplinary
Nathan M. Myers, Obinna Abah, Sebastian Deffner
Summary: Study shows that relativistic quantum systems exhibit unique characteristics in quantum thermal machines, with relativistic engines having higher work output but lower efficiency. By analyzing the operation of relativistic engines at different temperatures, it is found that these engines have significant differences in performance compared to their non-relativistic counterparts.
NEW JOURNAL OF PHYSICS
(2021)
Article
Mechanics
Eun-jin Kim
Summary: Information geometry theory is an advantageous method for understanding complexity, allowing us to describe the characteristics of time-varying, non-equilibrium processes by measuring the change in information along the evolution path of a stochastic variable. By linking it with thermodynamic concepts, we can further explain the meaning of information length and information rate, as well as their relationship with entropy production and self-organization.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2021)
Article
Physics, Fluids & Plasmas
Gianluca Francica
Summary: This article discusses the significance of fluctuation theorems in nonequilibrium thermodynamics, derives a thermodynamic uncertainty relation, and examines the relationship between this relation and the correlation between entropy and observables.
Article
Physics, Multidisciplinary
Ivan M. Khaymovich, Vladimir E. Kravtsov
Summary: This article investigates the static and dynamical phases in a Rosenzweig-Porter (RP) random matrix ensemble, presenting a general theory of survival probability and identifying different phases such as exponential, stretch-exponential, and frozen-dynamics. By considering examples like the Anderson localization model and the logarithmically-normal RP random matrix ensemble, exact values and phase diagrams are found, allowing for the analytical description of finite-size multifractality and computation of critical lengths.
Article
Physics, Multidisciplinary
Pavel A. Nosov, Ivan M. Khaymovich, Andrey Kudlis, Vladimir E. Kravtsov
Summary: The accuracy of the forward scattering approximation for two-point Green's functions of the Anderson localization model on the Cayley tree is analyzed. The relationship between the moments of the Green's function and the largest eigenvalue of the linearized transfer-matrix equation is proved, and a new approximation for this eigenvalue is derived. It is shown that the FSA overestimates the probability of the Green's function being significantly larger than its typical value.
Article
Physics, Multidisciplinary
Anton G. Kutlin, Ivan M. Khaymovich
Summary: This study investigates the effects of partial correlations in kinetic hopping terms of long-range disordered random matrix models on their localization properties. Both analytical and numerical analyses show that any deviation from the completely correlated case leads to emergent non-ergodic delocalization in the system. The study also develops a generalization of the Dyson Brownian motion and cavity approaches for models with correlated kinetic terms.
Article
Physics, Multidisciplinary
Vedant R. Motamarri, Alexander S. Gorsky, Ivan M. Khaymovich
Summary: Motivated by the interplay of Bethe-Ansatz integrability and localization in the Richardson model of superconductivity, this study analyzes the localization and ergodicity-breaking properties of the single-particle spectrum in a time-reversal symmetry breaking deformation known as the Russian Doll Model (RDM) with diagonal on-site disorder. A large-energy renormalization group (RG) method is used to derive an effective Hamiltonian for the model and a fractal phase of non-ergodic delocalized states is discovered, with a fractal dimension different from the Rosenzweig-Porter model.
Article
Physics, Multidisciplinary
Xiaolong Deng, Alexander L. Burin, Ivan M. Khaymovich
Summary: The study investigates a 2D dipolar system with tunable dipole-dipole interaction in trapped-ion or Rydberg-atom systems. The results demonstrate the unexpected reentrant localization phenomenon beyond the locator expansion when the anisotropic dipole exchange is sufficiently strong.
Article
Physics, Multidisciplinary
Adway Kumar Das, Anandamohan Ghosh, Ivan M. Khaymovich
Summary: In this study, we introduce a new discrete model that exhibits both localized and extended states without forming a mobility edge. By locally mapping the model, we confirm the coexistence of localized and extended states and analytically estimate the fractal dimensions of the extended states.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Madhumita Sarkar, Roopayan Ghosh, Ivan M. Khaymovich Nordita
Summary: The Rosenzweig-Porter (RP) model is an important analytically tractable model for understanding many-body localization phenomenon. This study provides analytical evidence and numerical support for the controllable tuning of the phase diagram in the RP model by employing on-site potentials with a nontrivial fractal dimension. The study also reveals the impact of such tuning on the fractal phase and eigenfunction dimensions, as well as the level statistics in the system.
Article
Materials Science, Multidisciplinary
Daniil Kochergin, Ivan M. Khaymovich, Olga Valba, Alexander Gorsky
Summary: In this paper, we investigate the properties of a random regular graph with node degree d perturbed by chemical potentials mu k for a number of short k-cycles. We analyze the phase diagram of the model in the (mu(k), d) plane both numerically and analytically. We find the critical curve separating the homogeneous and clusterized phases, and demonstrate that the clusterized phase itself can split into a phase with ideal clusters and a phase with coupled ones when the continuous spectrum forms. The eigenstate spatial structure of the model is investigated and localized scarlike states related to the topologically equivalent nodes in the graph are found. We also reconsider the localization of states in the nonperturbative band and find a semi-Poisson level spacing distribution. The Anderson transition for the case of combined structural and diagonal disorders is studied and it is found that the critical diagonal disorder is significantly reduced at the clusterization phase transition.
Article
Materials Science, Multidisciplinary
Giuseppe De Tomasi, Ivan M. Khaymovich
Summary: We study the stability of nonergodic but extended phases in non-Hermitian systems and analyze the spectral and multifractal properties of the non-Hermitian case. The ergodic and localized phases are found to be stable, while the stability of the fractal phase depends on the choice of the diagonal elements.
Article
Materials Science, Multidisciplinary
Aamna Ahmed, Ajith Ramachandran, Ivan M. Khaymovich, Auditya Sharma
Summary: In this study, we investigate the effect of quasiperiodic Aubry-Andre disorder on the energy spectrum and eigenstates of a one-dimensional all-band-flat diamond chain. We find that the symmetric perturbation preserves compact localization while lifting the degeneracy, while the antisymmetric perturbation not only lifts the degeneracy but also destroys compact localization. Interestingly, all eigenstates exhibit multifractal behavior below a critical potential strength, while a central band of eigenstates continues to display extended behavior for arbitrarily large strengths of the potential.
Article
Quantum Science & Technology
W. Tang, I. M. Khaymovich
Summary: Motivated by the many-body localization phase, this study develops a model that simulates the same eigenstate structure in a random matrix setting. The model demonstrates the absence of energy level repulsion and carries non-ergodic eigenstates, delocalized over an extensive number of configurations in the Hilbert space. The study also formulates general conditions for single-particle and random matrix models to possess such states, based on the generalization of Anderson localization and multiple resonances.
Article
Materials Science, Multidisciplinary
Luis Colmenarez, David J. Luitz, Ivan M. Khaymovich, Giuseppe De Tomasi
Summary: In this study, we investigate the scaling of the Thouless time in the Anderson model on random regular graphs. The results show that the scaling of the Thouless time is consistent with the existence of a subdiffusive regime.
Article
Physics, Fluids & Plasmas
Masudul Haque, Paul A. McClarty, Ivan M. Khaymovich
Summary: Eigenstates of local many-body interacting systems far from spectral edges are believed to be ergodic and close to randomness, aligning with the eigenstate thermalization hypothesis and entanglement volume-law scaling. However, systematic departures from complete randomness are typically present in mid-spectrum eigenstates, partly due to spatial correlations and orthogonality to eigenstates at the spectral edge, which introduce structure to these mid-spectrum states.
Article
Materials Science, Multidisciplinary
A. Samokhvalov, I. A. Shereshevskii, N. K. Vdovicheva, M. Taupin, I. M. Khaymovich, A. S. Mel'nikov
Summary: In this study, we investigated the energy relaxation of nonequilibrium quasiparticles (QPs) in dirty s-wave superconductors (SCs) with different vortex configurations. By using the Usadel approach, we calculated the heat flow from the electronic subsystem to phonons in mesoscopic SC disks with a radius of several coherence lengths, in both the Meissner and giant vortex states. Our results showed that the recombination process is strongly influenced by the subgap states located in the vortex core and in the region at the sample edge where the spectral gap Eg is reduced by the Meissner currents. To explain the physical origin of these results, we developed a semiquantitative analytical approximation and analytically calculated the corresponding spatially resolved electron-phonon heat rates. Our approach provides important insights into the cooling of nonequilibrium QPs by magnetic field-induced traps in various mesoscopic SC devices.
Article
Materials Science, Multidisciplinary
Giuseppe De Tomasi, Ivan M. Khaymovich, Frank Pollmann, Simone Warzel
Summary: In this paper, the authors investigate the many-body localization (MBL) transition and its relation to eigenstate structures in the Fock space. They introduce a radial probability distribution and analyze the nonself-averaging property of the many-body fractal dimension D-q. Through analytical evidence and examples, they demonstrate the consistency of MBL transition in the Fock space with the avalanche mechanism for delocalization. The MBL transition is seen as a transition from ergodic states to nonergodic extended states, providing insights into the disorder scaling for the Anderson localization transition.
