Exergy of passive states: Waste energy after ergotropy extraction

• URL: http://arxiv.org/abs/2107.01828v3
• Date: Wed, 15 Sep 2021 16:25:14 GMT
• Title: Exergy of passive states: Waste energy after ergotropy extraction
• Authors: F. H. Kamin, S. Salimi and Alan C. Santos
• Abstract summary: We show that some amount of energy can be lost when we extract ergotropy from a quantum system and quantified by the exergy of passive states. Our study opens the perspective for new advances in open system quantum batteries.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Work extraction protocol is always a significant issue in the context of quantum batteries, in which the notion of ergotropy is used to quantify a particular amount of energy that can be extracted through unitary processes. Given the total amount of energy stored in a quantum system, quantifying wasted energy after the ergotropy extraction is a question to be considered when undesired coupling with thermal reservoirs is taken into account. In this paper, we show that some amount of energy can be lost when we extract ergotropy from a quantum system and quantified by the exergy of passive states. Through a particular example, one shows that ergotropy extraction can be done by preserving the quantum correlations of a quantum system. Our study opens the perspective for new advances in open system quantum batteries able to explore exergy stored as quantum correlations.

Related papers

• Quantum caloric effects [0.0]
  This study focuses on deriving general expressions for caloric potentials in quantum systems. Our results recover the classical cases and also reveal that the isothermal entropy change can be related to genuine quantum correlations in the system.
  arXiv  Detail & Related papers  (2024-06-14T20:39:13Z)
• Quantum non-Markovianity, quantum coherence and extractable work in a general quantum process [0.0]
  Key concept in quantum thermodynamics is extractable work, which specifies the maximum amount of work that can be extracted from a quantum system. Different quantities are used to measure extractable work, the most prevalent of which are ergotropy and the difference between the non-equilibrium and equilibrium quantum free energy. We investigate the evolution of extractable work when an open quantum system goes through a general quantum process described by a completely-positive and trace-preserving dynamical map.
  arXiv  Detail & Related papers  (2023-09-10T11:05:35Z)
• Thermodynamics of adiabatic quantum pumping in quantum dots [50.24983453990065]
  We consider adiabatic quantum pumping through a resonant level model, a single-level quantum dot connected to two fermionic leads. We develop a self-contained thermodynamic description of this model accounting for the variation of the energy level of the dot and the tunnelling rates with the thermal baths.
  arXiv  Detail & Related papers  (2023-06-14T16:29:18Z)
• Quantum Ergotropy and Quantum Feedback Control [0.0]
  We study the energy extraction from and charging to a finite-dimensional quantum system by general quantum operations. We prove that the changes in energy induced by unital quantum operations are limited by the ergotropy/charging bound for unitary quantum operations.
  arXiv  Detail & Related papers  (2023-03-09T01:31:44Z)
• Daemonic ergotropy in continuously-monitored open quantum batteries [0.0]
  daemonic ergotropy is introduced to properly describe and quantify this work extraction enhancement in the quantum regime. We show that the corresponding daemonic ergotropy takes values between the ergotropy and the energy of the corresponding unconditional state. The upper bound is achieved by assuming an initial pure state and a perfectly efficient projective measurement on the environment.
  arXiv  Detail & Related papers  (2023-02-23T19:04:47Z)
• Universality of critical dynamics with finite entanglement [68.8204255655161]
  We study how low-energy dynamics of quantum systems near criticality are modified by finite entanglement. Our result establishes the precise role played by entanglement in time-dependent critical phenomena.
  arXiv  Detail & Related papers  (2023-01-23T19:23:54Z)
• Demonstrating Quantum Microscopic Reversibility Using Coherent States of Light [58.8645797643406]
  We propose and experimentally test a quantum generalization of the microscopic reversibility when a quantum system interacts with a heat bath. We verify that the quantum modification for the principle of microscopic reversibility is critical in the low-temperature limit.
  arXiv  Detail & Related papers  (2022-05-26T00:25:29Z)
• Taking the temperature of a pure quantum state [55.41644538483948]
  Temperature is a deceptively simple concept that still raises deep questions at the forefront of quantum physics research. We propose a scheme to measure the temperature of such pure states through quantum interference.
  arXiv  Detail & Related papers  (2021-03-30T18:18:37Z)
• Quantum and classical ergotropy from relative entropies [0.0]
  The quantum ergotropy quantifies the maximal amount of work that can be extracted from a quantum state without changing its entropy. A unified approach to treat both quantum as well as classical scenarios is provided by geometric quantum mechanics.
  arXiv  Detail & Related papers  (2021-03-19T15:07:26Z)
• Catalytic Transformations of Pure Entangled States [62.997667081978825]
  Entanglement entropy is the von Neumann entropy of quantum entanglement of pure states. The relation between entanglement entropy and entanglement distillation has been known only for the setting, and the meaning of entanglement entropy in the single-copy regime has so far remained open. Our results imply that entanglement entropy quantifies the amount of entanglement available in a bipartite pure state to be used for quantum information processing, giving results an operational meaning also in entangled single-copy setup.
  arXiv  Detail & Related papers  (2021-02-22T16:05:01Z)
• Entropy production in the quantum walk [62.997667081978825]
  We focus on the study of the discrete-time quantum walk on the line, from the entropy production perspective. We argue that the evolution of the coin can be modeled as an open two-level system that exchanges energy with the lattice at some effective temperature.
  arXiv  Detail & Related papers  (2020-04-09T23:18:29Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.