Quantum thermal machines in BTZ black hole spacetime

• URL: http://arxiv.org/abs/2503.14370v2
• Date: Mon, 02 Jun 2025 09:20:30 GMT
• Title: Quantum thermal machines in BTZ black hole spacetime
• Authors: Dimitris Moustos, Obinna Abah,
• Abstract summary: We investigate an Otto thermodynamic cycle with a qubit Unruh-DeWitt detector as the working medium.<n>We employ the thermal properties of the field to model heat and cold reservoirs between which the thermal machine operates.<n>Our study presents a general framework for understanding the finite-time operation of relativistic quantum thermal machines.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We investigate an Otto thermodynamic cycle with a qubit Unruh-DeWitt detector as the working medium, coupled to a massless, conformally coupled scalar quantum field in the Hartle-Hawking vacuum in a (2+1)-dimensional BTZ black hole spacetime. We employ the thermal properties of the field to model heat and cold reservoirs between which the thermal machine operates. Treating the detector as an open quantum system, we employ a master equation to study its finite-time dynamics during each cycle stroke. We evaluate the output performance of the Otto heat engine and refrigerator by computing, respectively, the total work output and the cooling power for each of the Neumann, transparent, and Dirichlet boundary condition cases satisfied by the field at spatial infinity. Furthermore, we evaluate the optimal performance of the thermal machine by analyzing its efficiency at maximum power output and ecological impact. Our study presents a general framework for understanding the finite-time operation of relativistic quantum thermal machines, focusing on their energy optimization.

Related papers

• 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)
• Energy-Efficient Pseudo-Ratchet for Brownian Computers through One-Dimensional Quantum Brownian Motion [30.817172862352244]
  We introduce a new approach based on one-dimensional (1D) quantum Brownian motion.<n>We exploit that quantum resonance effects in 1D systems divide the momentum space of particles into subspaces.<n>We analyze this pseudo-ratchet mechanism without energy dissipation from an entropic perspective.
  arXiv  Detail & Related papers  (2025-05-13T04:20:07Z)
• Relativistic quantum Otto heat engine using a three-level Unruh-DeWitt detector [0.0]
  We explore a relativistic quantum Otto heat engine with a qutrit as the working substance interacting with a quantum scalar field in curved spacetime. We derive a general positive work condition in terms of the effective temperature that each pair of energy levels perceives.
  arXiv  Detail & Related papers  (2025-04-02T07:38:58Z)
• Experimental realization of a quantum heat engine based on dissipation-engineered superconducting circuits [0.0]
  We experimentally demonstrate a quantum heat engine based on superconducting circuits.<n>We implement a quantum Otto cycle by a tailored drive on the QCR to sequentially induce cooling and heating.<n>We measure positive output powers and efficiencies that agree with our simulations of the quantum evolution.
  arXiv  Detail & Related papers  (2025-02-27T14:34:29Z)
• Exploring the role of criticality in the quantum Otto cycle fueled by the anisotropic quantum Rabi-Stark model [0.0]
  Quantum heat machines, encompassing heat engines, refrigerators, heaters, and accelerators, represent the forefront of quantum thermodynamics. This paper investigates a quantum Otto engine operating in both ideal and finite-time scenarios. By focusing on quantum heat engines, our study reveals that these phase transitions critically modulate the efficiency and power of AQRSM-based engines.
  arXiv  Detail & Related papers  (2024-07-12T06:36:57Z)
• 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)
• Energetics of the dissipative quantum oscillator [22.76327908349951]
  We discuss some aspects of the energetics of a quantum Brownian particle placed in a harmonic trap. Based on the fluctuation-dissipation theorem, we analyze two distinct notions of thermally-averaged energy. We generalize our analysis to the case of the three-dimensional dissipative magneto-oscillator.
  arXiv  Detail & Related papers  (2023-10-05T15:18:56Z)
• 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)
• Dynamical Control of Quantum Heat Engines Using Exceptional Points [0.09679987540134938]
  A quantum thermal machine is an open quantum system coupled to hot and cold thermal baths. A hallmark of non-Hermiticity is the existence of exceptional points where the eigenvalues of a non-Hermitian Hamiltonian or an Liouvillian superoperator and their associated eigenvectors coalesce. Here, we report the experimental realisation of a single-ion heat engine and demonstrate the effect of the Liouvillian exceptional points on the dynamics and the performance of a quantum heat engine.
  arXiv  Detail & Related papers  (2022-10-24T06:49:05Z)
• Thermodynamics and Fluctuations in Quantum Heat Engines under Reservoir Squeezing [7.109424824240926]
  We show that reservoir squeezing significantly enhances the performance by increasing the thermodynamic efficiency and the power. An experimental scheme for realizing this quantum heat engine is proposed using a single-electron spin pertaining to a trapped 40Ca$+$ ion.
  arXiv  Detail & Related papers  (2022-09-13T11:15:31Z)
• The quantum Otto cycle in a superconducting cavity in the non-adiabatic regime [62.997667081978825]
  We analyze the efficiency of the quantum Otto cycle applied to a superconducting cavity. It is shown that, in a non-adiabatic regime, the efficiency of the quantum cycle is affected by the dynamical Casimir effect.
  arXiv  Detail & Related papers  (2021-11-30T11:47:33Z)
• 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)
• Temperature dependent maximization of work and efficiency in a degeneracy assisted quantum Stirling heat engine [1.8070424740773694]
  harmonic oscillator quantum Stirling heat engine (HO-QSHE) at a given frequency can be maximized at a specific ratio of the temperatures of the thermal reservoirs. We analyse quantum Stirling heat engine with an ensemble of particle in box quantum systems as the working medium.
  arXiv  Detail & Related papers  (2020-12-21T14:17:15Z)
• Simulation of Thermal Relaxation in Spin Chemistry Systems on a Quantum Computer Using Inherent Qubit Decoherence [53.20999552522241]
  We seek to take advantage of qubit decoherence as a resource in simulating the behavior of real world quantum systems. We present three methods for implementing the thermal relaxation. We find excellent agreement between our results, experimental data, and the theoretical prediction.
  arXiv  Detail & Related papers  (2020-01-03T11:48:11Z)

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.