Article
Physics, Multidisciplinary
Hiroki Murakami, Norimasa Yamada
Summary: Fitts studied information capacity and transfer in the speed-accuracy motor paradigm using a theoretical approach based on information theory. By estimating information entropy and mutual information of multiple human movement trajectories, Fitts found that information was processed from the first half of the trajectory in difficult tasks.
Article
Physics, Fluids & Plasmas
Harry J. D. Miller, M. Hamed Mohammady, Marti Perarnau-Llobet, Giacomo Guarnieri
Summary: This study focuses on the joint statistics of work and entropy production in driven quantum systems, deriving a general formula for the cumulant generating function and the detailed fluctuation theorem along with a modified fluctuation-dissipation relation. It shows that as long as the driven system remains close to the instantaneous Gibbs state, these relations hold true, even in systems that violate detailed balance.
Article
Physics, Fluids & Plasmas
Trevor GrandPre, Katherine Klymko, Kranthi K. Mandadapu, David T. Limmer
Summary: The study establishes a general lower bound on entropy production in interacting active matter systems, revealing a relationship between entropy and phase transitions in active matter models. It also explores factors affecting collective fluctuations and long-ranged correlations, shedding light on the dynamics of enhanced fluctuations and control mechanisms within the system.
Article
Optics
Sareh Shahidani, Morteza Rafiee
Summary: This paper investigates the Wigner entropy production rate in the stationary state of a two-mode Gaussian system, revealing that the parametric amplification process leads one of the bosonic modes to evolve into a squeezed-thermal state, affecting heat flow and total vacuum entropy production of the system.
Article
Physics, Nuclear
Chandrodoy Chattopadhyay, Ulrich Heinz, Thomas Schaefer
Summary: We study the hydrodynamic evolution of a quark-gluon gas with nonzero quark masses and net baryon number in its phase diagram. For far-off-equilibrium initial conditions, the expansion trajectories do not follow the simple rules based on the second law of thermodynamics established for ideal or weakly dissipative fluids. We analyze the Bjorken flow in kinetic theory to provide a microscopic understanding of these macroscopic phenomena and ensure their thermodynamic consistency. We identify a phenomenon called viscous cooling, where the temperature decreases faster than in adiabatic expansion due to dissipative effects.
Article
Quantum Science & Technology
Wen-jing Li, Liang Tang, Qun Zhang, Ming-qiang Bai
Summary: The paper discusses how obtaining information of a quantum system through quantum measurements can bring disturbances to the system and affect the entanglement between arbitrary bipartite systems. By modeling the measurement process as tripartite systems and defining various information quantities, the relationships between information gain and entanglement in the tripartite systems are explored.
QUANTUM INFORMATION PROCESSING
(2021)
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
Materials Science, Multidisciplinary
Nikhil Seshadri, Michael Galperin
Summary: By considering von Neumann expression and utilizing nonequilibrium Green's function techniques, the paper derived bath and energy resolved expressions for entropy, entropy production, and information flows. The formulation of these expressions in terms of system degrees freedom is convenient for simulating thermodynamic characteristics of open nonequilibrium quantum systems. Standard NEGF is used for noninteracting systems while Hubbard NEGF is employed for interacting systems in numerical simulations within generic junction models.
Article
Astronomy & Astrophysics
Yusuke Nishida
Summary: This study investigates the probability distribution of particle and antiparticle pairs produced via the Schwinger effect under the influence of a time-dependent electric field. The findings suggest that pair production is enhanced or suppressed in a medium for scalars or spinors respectively, due to Bose stimulation or Pauli blocking. Additionally, the annihilation of decelerated pairs is observed, along with the extraction of probability distributions in various scenarios using specialized statistics.
Article
Physics, Multidisciplinary
Georgios Styliaris, Namit Anand, Paolo Zanardi
Summary: The study presents exact analytical results for the bipartite OTOC, showing its relationship with operator entanglement and its impact on entangling power. Additionally, it explores the connection between long-time averages of the OTOC and eigenstate entanglement.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Andrew Rolph
Summary: In this article, we study the entanglement structure and dynamics in CFTs and black holes, employing a local entanglement measure known as the entanglement contour. We calculate the entanglement contour for different systems, including 1+1-dimensional condensed matter systems and simplified models of black hole evaporation. Our findings reveal universal results for the entanglement contours in low energy non-equilibrium states of 2D CFTs and illustrate the presence of an island phase transition in the entanglement contour of a non-gravitational bath coupled to an extremal AdS(2) black hole.
Article
Physics, Multidisciplinary
Subhadeep Mondal, Amit Kumar Dutta
Summary: This paper proposes two key methods to improve the computational complexity and sample complexity of traditional quantum state tomography protocols. The first method is a low-cost positivity constraint method based on density matrix perturbation after least squares estimation. The second method is a cost function with maximum linear entropy and least squares method, called the LS with maximum entropy method. Performance analysis and extensive numerical simulations are conducted to demonstrate the advantages of these proposed tomography algorithms compared to existing techniques for different sample complexities and dimensionalities.
NEW JOURNAL OF PHYSICS
(2023)
Article
Physics, Multidisciplinary
Charis Anastopoulos, Bei-Lok Hu
Summary: The paper points out three common problems in using quantum information theory to address gravity-related issues, including the inconsistency between interactions mediated by an information channel and those treated by quantum field theory, the neglect of important quantum features when replacing a quantum field with a classical stochastic field, and the conditions under which semi-classical and stochastic theories can be formulated from their quantum origins.
Article
Optics
Keren Zhalenchuck, Barak Hadad, Alon Bahabad
Summary: This article demonstrates the operation of an optical conveyor with the geometry of an Archimedes screw, allowing particles to be conveyed along any desired paraxial trajectory.
LASER & PHOTONICS REVIEWS
(2022)
Article
Physics, Fluids & Plasmas
Domingos S. P. Salazar
Summary: Fluctuation theorems set fundamental limits on the statistics of entropy production, with the information quantification and upper bound determined by the maximal distribution. This bound is verified in various scenarios, including heat transfer and qubit swap engines, showcasing the versatility of the theory.
Article
Multidisciplinary Sciences
Bruno Leggio, Julien Laussu, Axel Carlier, Christophe Godin, Patrick Lemaire, Emmanuel Faure
NATURE COMMUNICATIONS
(2019)
Article
Physics, Multidisciplinary
Bruno Leggio, Anna Napoli, Hiromichi Nakazato, Antonino Messina
Article
Physics, Multidisciplinary
Dario Tamascelli, Claudia Benedetti, Heinz-Peter Breuer, Matteo G. A. Paris
NEW JOURNAL OF PHYSICS
(2020)
Article
Multidisciplinary Sciences
Leo Guignard, Ulla-Maj Fiuza, Bruno Leggio, Julien Laussu, Emmanuel Faure, Gael Michelin, Kilian Biasuz, Lars Hufnagel, Gregoire Malandain, Christophe Godin, Patrick Lemaire
Article
Physics, Multidisciplinary
Alessandra Colla, Niklas Neubrand, Heinz-Peter Breuer
Summary: We investigate the dynamics of open quantum systems initially correlated with their environment, and propose a method to describe non-Markovian dynamics using a time-local master equation.
NEW JOURNAL OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
Moritz F. Richter, Raphael Wiedenmann, Heinz-Peter Breuer
Summary: This article introduces a method of representing mixed quantum states using quasi-probability distributions and explains the influence of Kolmogorov distance between these distributions on the distinguishability of quantum states. A witness for non-Markovianity is also constructed and its performance is discussed in several examples.
NEW JOURNAL OF PHYSICS
(2022)
Article
Optics
Sophia Ohnemus, Heinz-Peter Breuer, Andreas Ketterer
Summary: In this work, we utilize randomized measurements to probe the entanglement in multiparticle quantum systems. We also present a statistical analysis of the required measurement resources using tools from random matrix theory. We demonstrate our framework through numerical experiments on entangled states and output states from random quantum circuits, and show its applicability in the presence of noise.
Article
Optics
S. Wenderoth, H. -P. Breuer, M. Thoss
Summary: In general, a small system in contact with a macroscopic environment will approach an asymptotic state, mainly determined by macroscopic properties of the environment. However, in certain situations, the asymptotic state of the system is influenced by its initial state, retaining some information about it indefinitely. In this study, we propose a measure to quantify the influence of the initial state on the dynamics of an open system, derive conditions for the existence and uniqueness of the asymptotic state, and demonstrate its application through the spin-boson model. We identify three qualitatively distinct long-time behaviors and discuss how they can be characterized using the proposed measure.
Article
Optics
Federico Settimo, Heinz -Peter Breuer, Bassano Vacchini
Summary: We analyze and compare different measures for non-Markovianity in the dynamics of open quantum systems, and find that the measure based on the trace norm is stronger than the measures based on entropy.
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
Optics
Alessandra Colla, Heinz-Peter Breuer
Summary: In this study, we examined quantum entropy production, different types of correlations, and their interplay in the driven Caldeira-Leggett model of quantum Brownian motion. We compared two definitions of entropy production and explored system-environment correlations, intraenvironment correlations, and the evolution of quantum entanglement between the system and the environment. This research provides insights into the dynamics of quantum systems and their interactions with their environment.
Article
Optics
S. Wenderoth, H-P Breuer, M. Thoss
Summary: The study found that in the spin-boson model, when the timescales of the system and bath are comparable, a complex nonmonotonic dependence of non-Markovianity on the system-bath coupling strength is observed.
Article
Optics
Simon Einsiedler, Andreas Ketterer, Heinz-Peter Breuer
Article
Optics
Giulio Amato, Heinz-Peter Breuer, Sandro Wimberger, Alberto Rodriguez, Andreas Buchleitner
Article
Optics
Giulio Amato, Heinz-Peter Breuer, Bassano Vacchini
