Related papers: Efficiency fluctuations in a quantum battery charged by a repeated interaction process

Efficiency fluctuations in a quantum battery charged by a repeated interaction process

URL: http://arxiv.org/abs/2205.09835v1
Date: Thu, 19 May 2022 20:18:59 GMT
Title: Efficiency fluctuations in a quantum battery charged by a repeated interaction process
Authors: Felipe Barra
Abstract summary: A repeated interaction process assisted by auxiliary thermal systems charges a quantum battery. The charged state is an equilibrium state for the repeated interaction process, and the ergotropy characterizes its charge. We discuss the fluctuating efficiency of the process, among other fluctuating properties.
Score: 0.0
License: http://creativecommons.org/licenses/by-nc-sa/4.0/
Abstract: A repeated interaction process assisted by auxiliary thermal systems charges a quantum battery. The charging energy is supplied by switching on and off the interaction between the battery and the thermal systems. The charged state is an equilibrium state for the repeated interaction process, and the ergotropy characterizes its charge. The working cycle consists in extracting the ergotropy and charging the battery again. We discuss the fluctuating efficiency of the process, among other fluctuating properties. These fluctuations are dominated by the equilibrium distribution and depend weakly on other process properties.

Related papers

Thermodynamic Roles of Quantum Environments: From Heat Baths to Work Reservoirs [49.1574468325115]
Environments in quantum thermodynamics usually take the role of heat baths. We show that within the same model, the environment can take three different thermodynamic roles. The exact role of the environment is determined by the strength and structure of the coupling.
arXiv Detail & Related papers (2024-08-01T15:39:06Z)
Daemonic quantum battery charged by thermalization [0.0]
We introduce a protocol that uses a quantum system as a memory that measures the charger and leaves the battery intact in its charged state. We study the memory's ergotropy and the daemonic ergotropy of the battery.
arXiv Detail & Related papers (2024-05-24T21:31:48Z)
Nonlocal thermoelectric detection of interaction and correlations in edge states [62.997667081978825]
We propose the nonlocal thermoelectric response as a direct indicator of the presence of interactions, nonthermal states and the effect of correlations. A setup with two controllable quantum point contacts allows thermoelectricity to monitor the interacting system thermalisation.
arXiv Detail & Related papers (2023-07-18T16:28:59Z)
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 field heat engine powered by phonon-photon interactions [58.720142291102135]
We present a quantum heat engine based on a cavity with two oscillating mirrors. The engine performs an Otto cycle during which the walls and a field mode interact via a nonlinear Hamiltonian.
arXiv Detail & Related papers (2023-05-10T20:27:15Z)
The laws of thermodynamics for quantum dissipative systems: A quasi-equilibrium Helmholtz energy approach [0.0]
We investigate the thermal properties of both an isothermal process and a transition process between the adiabatic and isothermal states. We find that the thermodynamic efficiency of this machine is zero because the field for the isothermal processes acts as a refrigerator.
arXiv Detail & Related papers (2022-05-23T23:05:53Z)
Collective effects and quantum coherence in dissipative charging of quantum batteries [0.0]
We show that for low temperatures the collective process can attain a charging power that increases polynomically with the number of batteries. We also study the dissipative charging process of single battery using a time dependent Hamiltonian that generates coherences in the energy basis.
arXiv Detail & Related papers (2022-05-13T21:17:32Z)
Heat transport and cooling performance in a nanomechanical system with local and non local interactions [68.8204255655161]
We study heat transport through a one dimensional time-dependent nanomechanical system. The system presents different stationary transport regimes depending on the driving frequency, temperature gradients and the degree of locality of the interactions.
arXiv Detail & Related papers (2022-02-21T12:03:54Z)
Quantum batteries at the verge of a phase transition [0.0]
We study a cyclic battery-charger quantum device that is in thermal equilibrium, or in a ground state, during the charge storing stage. The main figures of merit - the extracted energy and the thermodynamic efficiency - can be enhanced by operating the cycle close to the quantum phase transition point.
arXiv Detail & Related papers (2021-10-20T14:49:36Z)
Dissipative dynamics of an open quantum battery [0.0]
Coupling with an external environment inevitably affects the dynamics of a quantum system. We consider how charging performances of a quantum battery, modelled as a two level system, are influenced by the presence of an Ohmic thermal reservoir.
arXiv Detail & Related papers (2020-05-28T14:11:38Z)
Out-of-equilibrium quantum thermodynamics in the Bloch sphere: temperature and internal entropy production [68.8204255655161]
An explicit expression for the temperature of an open two-level quantum system is obtained. This temperature coincides with the environment temperature if the system reaches thermal equilibrium with a heat reservoir. We show that within this theoretical framework the total entropy production can be partitioned into two contributions.
arXiv Detail & Related papers (2020-04-09T23:06:43Z)

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