Trade-off between coherence and heat in a non-Markovian dephasing dynamics

• URL: http://arxiv.org/abs/2603.27387v1
• Date: Sat, 28 Mar 2026 19:37:56 GMT
• Title: Trade-off between coherence and heat in a non-Markovian dephasing dynamics
• Abstract summary: How quantum coherence influences thermodynamic behavior remains an open question in quantum thermodynamics.<n>We investigate this relation within the pure dephasing framework, where a central qubit interacts with a finite Ising-like spin environment.<n>Although the system's internal energy remains constant, the interaction induces decoherence and gives rise to nontrivial thermodynamic features.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: How quantum coherence influences thermodynamic behavior remains an open question in quantum thermodynamics. Here we investigate this relation within the pure dephasing framework, where a central qubit interacts with a finite Ising-like spin environment. Although the system's internal energy remains constant, the interaction induces decoherence and gives rise to nontrivial thermodynamic features. Within the two-point measurement approach, we show that the heat dissipated into the environment matches the coherent energy contribution appearing in a reformulated first law of quantum thermodynamics. Numerical calculations reveal oscillatory coherence dynamics, with revivals associated with information backflow and non-Markovian effects, as quantified by the Breuer-Laine-Piilo measure. We find that heat and coherence exhibit intertwined temporal behavior, with enhanced heat dissipation during coherence decay and reduced heat during revivals. These results suggest a connection between coherence dynamics and thermodynamic quantities in finite, closed composite systems undergoing pure dephasing.

Related papers

• Breakdown of Thermalization from Real-Time Dynamics in the Two-Dimensional Hubbard Model [37.56003520528009]
  Thermalization in strongly correlated fermionic systems remains a central open problem in quantum many-body physics.<n>In this work, we investigate the real-time dynamics and the approach to thermalization in the two-dimensional Hubbard model.
  arXiv  Detail & Related papers  (2026-06-03T18:00:05Z)
• Reversing Heat Flow by Coherence in a Multipartite Quantum System [9.613297423446216]
  We show that internal quantum coherence in a multipartite spin system can reverse heat flow.<n>Results enable precise control of heat flow using only local quantum properties.
  arXiv  Detail & Related papers  (2026-01-01T04:19:26Z)
• Heat measurement of quantum interference [35.638905508510135]
  coherence plays a key role in the operation and performance of quantum heat engines and refrigerators.<n>We measure quantum features in the heat transfer between a qubit and a thermal bath in a system formed of a driven flux qubit galvanically coupled to a $lambda/4$ coplanar-waveguide resonator.
  arXiv  Detail & Related papers  (2025-10-27T07:55:23Z)
• Heating Dynamics of Correlated Fermions under Dephasing [0.0]
  We study the dissipative dynamics of correlated fermions evolving in presence of a local dephasing bath.<n>We show that the dissipative dynamics describes heating towards infinite temperature, with a relaxation rate that depends strongly on interaction.
  arXiv  Detail & Related papers  (2025-07-29T13:40:51Z)
• 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)
• 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)
• Finite-time quantum Otto engine with a squeezed thermal bath: Role of quantum coherence and squeezing in the performance and fluctuations [7.533259024252197]
  We consider a finite-time quantum Otto heat engine that consists of two isochoric (thermal-contact) process. We derive the analytical expressions for the thermodynamic quantities of the two-level heat engine. Our results clarify the role of coherence and squeezing in the performance and fluctuations in the quantum Otto engines.
  arXiv  Detail & Related papers  (2022-05-26T12:07:51Z)
• 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)
• Thermodynamics of a continuous quantum heat engine: Interplay between population and coherence [0.0]
  We present a detailed thermodynamic analysis of a three-level quantum heat engine coupled continuously to hot and cold reservoirs. The system is driven by an oscillating external field and is described by the Markovian quantum master equation. We calculate the heat, power, and efficiency of the system for the heat-engine operating regime and also examine the thermodynamic uncertainty relation.
  arXiv  Detail & Related papers  (2021-07-13T09:52:01Z)
• Geometric Heat Pump: Controlling Thermal Transport with Time-dependent Modulations [21.544545839943446]
  We review the emergence and development of this so called geometric heat pump'' The generalization from the adiabatic to the non-adiabatic regime and the application of control theory are also discussed.
  arXiv  Detail & Related papers  (2021-06-25T14:24:42Z)
• Relating Heat and Entanglement in Strong Coupling Thermodynamics [0.0]
  We develop a new approach to study thermodynamics in the strong coupling regime. We apply the method to calculate the time-dependent thermodynamic properties of a system and an environment. The results indicate that the transient imbalance between heat dissipated and heat absorbed is responsible for the generation of system-environment entanglement.
  arXiv  Detail & Related papers  (2021-04-13T05:36:21Z)
• Qubit thermodynamics far from equilibrium: two perspectives about the nature of heat and work in the quantum regime [68.8204255655161]
  We develop an alternative theoretical framework for the thermodynamic analysis of two-level systems. We observe the appearance of a new term of work, which represents the energy cost of rotating the Bloch vector in presence of the external field that defines the local Hamiltonian. In order to illustrate our findings we study, from both perspectives, matter-radiation interaction processes for two different systems.
  arXiv  Detail & Related papers  (2021-03-16T09:31:20Z)
• Hierarchical-environment-assisted non-Markovian and its effect on thermodynamic properties [15.450802027885135]
  We show how the non-Markovian character of the system is influenced by the coupling strength of system-auxiliary system and auxiliary system-reservoir. And the information flow between the system and environment is always accompanied by energy exchange.
  arXiv  Detail & Related papers  (2020-10-26T17:47:27Z)
• 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.

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