Coherent heat exchange in a prethermalizing open quantum system

• URL: http://arxiv.org/abs/2508.03193v1
• Date: Tue, 05 Aug 2025 08:02:43 GMT
• Title: Coherent heat exchange in a prethermalizing open quantum system
• Authors: Simone Artini, Mauro Paternostro, Salvatore Lorenzo,
• Abstract summary: We explore the effects of quantum coherence in the energy eigenbasis of the initial state of the system on the process of heat exchange with a bath.<n>We compare these results with those obtained from the widely used Two-Point Measurement scheme which, by construction, fails to capture such quantum effects.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We investigate a simple model exhibiting a prethermal phase, i.e. a metastable state that emerges before full thermalization, through the framework of quantum stochastic thermodynamics. We explore the effects of quantum coherence in the energy eigenbasis of the initial state of the system on the process of heat exchange with a bath, and their contribution to entropy production as quantified by a heat-exchange fluctuation theorem. Such relation is derived using the End-Point Measurement (EPM) scheme, a protocol that accounts for initial quantum coherence in the statistics of energy exchanges resulting from a non-equilibrium process. We compare these results with those obtained from the widely used Two-Point Measurement (TPM) scheme which, by construction, fails to capture such quantum effects.

Related papers

• Revealing the fuel of a quantum continuous measurement-based refrigerator [0.0]
  We show that a microscopic model of the apparatus is necessary to determine whether quantum measurements provide energy in the form of heat or work.<n>We demonstrate a trade-off between a maximal thermodynamic efficiency when the measurement-based refrigerator is fueled by heat and a maximal measurement efficiency quantified by the signal-to-noise ratio in the work-fueled regime.
  arXiv  Detail & Related papers  (2025-02-14T18:24:13Z)
• Thermalization and Criticality on an Analog-Digital Quantum Simulator [133.58336306417294]
  We present a quantum simulator comprising 69 superconducting qubits which supports both universal quantum gates and high-fidelity analog evolution. We observe signatures of the classical Kosterlitz-Thouless phase transition, as well as strong deviations from Kibble-Zurek scaling predictions. We digitally prepare the system in pairwise-entangled dimer states and image the transport of energy and vorticity during thermalization.
  arXiv  Detail & Related papers  (2024-05-27T17:40:39Z)
• 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 Fisher Information for Different States and Processes in Quantum Chaotic Systems [77.34726150561087]
  We compute the quantum Fisher information (QFI) for both an energy eigenstate and a thermal density matrix. We compare our results with earlier results for a local unitary transformation.
  arXiv  Detail & Related papers  (2023-04-04T09:28:19Z)
• Exchange fluctuation theorems for strongly interacting quantum pumps [0.0]
  We derive a general quantum exchange fluctuation theorem for multipartite systems with arbitrary coupling strengths. The resulting second law of thermodynamics is tighter than the conventional Clausius inequality.
  arXiv  Detail & Related papers  (2022-09-26T18:01:59Z)
• 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)
• Open-system approach to nonequilibrium quantum thermodynamics at arbitrary coupling [77.34726150561087]
  We develop a general theory describing the thermodynamical behavior of open quantum systems coupled to thermal baths. Our approach is based on the exact time-local quantum master equation for the reduced open system states.
  arXiv  Detail & Related papers  (2021-09-24T11:19:22Z)
• Suppressing coherence effects in quantum-measurement based engines [5.363106329253996]
  We propose a universal framework to describe the thermodynamics of a quantum engine fueled by quantum projective measurements. We show that replacing the standard hot thermal reservoir by a projective measurement operation could improve the performance of the quantum engine.
  arXiv  Detail & Related papers  (2021-08-18T06:51:26Z)
• Experimental verification of fluctuation relations with a quantum computer [68.8204255655161]
  We use a quantum processor to experimentally validate a number of theoretical results in non-equilibrium quantum thermodynamics. Our experiments constitute the experimental basis for the understanding of the non-equilibrium energetics of quantum computation.
  arXiv  Detail & Related papers  (2021-06-08T14:16:12Z)
• Quantifying the quantum heat contribution from a driven superconducting circuit [0.0]
  We propose a two-reservoir setup to detect the quantum component in the heat flow exchanged by a coherently driven atom with its thermal environment. tuning the driving parameters switches on and off the quantum and classical contributions to the heat flows, enabling their independent characterization.
  arXiv  Detail & Related papers  (2020-01-28T14:38:32Z)

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.