Quantum Heat Engines with Carnot Efficiency at Maximum Power

• URL: http://arxiv.org/abs/2106.01193v3
• Date: Thu, 3 Mar 2022 13:37:30 GMT
• Title: Quantum Heat Engines with Carnot Efficiency at Maximum Power
• Authors: Mohit Lal Bera, Sergi Juli\`a-Farr\'e, Maciej Lewenstein, and Manabendra Nath Bera
• Abstract summary: We introduce quantum heat engines that deliver maximum power with Carnot efficiency in the one-shot finite-size regime. The engines operate in a one-step cycle by letting the working system simultaneously interact with hot and cold baths.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Heat engines constitute the major building blocks of modern technologies. However, conventional heat engines with higher power yield lesser efficiency and vice versa and respect various power-efficiency trade-off relations. This is also assumed to be true for the engines operating in the quantum regime. Here we show that these relations are not fundamental. We introduce quantum heat engines that deliver maximum power with Carnot efficiency in the one-shot finite-size regime. These engines are composed of working systems with a finite number of quantum particles and are restricted to one-shot measurements. The engines operate in a one-step cycle by letting the working system simultaneously interact with hot and cold baths via semi-local thermal operations. By allowing quantum entanglement between its constituents and, thereby, a coherent transfer of heat from hot to cold baths, the engine implements the fastest possible reversible state transformation in each cycle, resulting in maximum power and Carnot efficiency. Finally, we propose a physically realizable engine using quantum optical systems.

Related papers

• InAs three quantum dots as working substance for quantum heat engine [0.0]
  In this paper, we consider three InAs quantum dots as a working substance, which allows the engine to operate at very small scales. We study the behavior of the work performed by the engine and the entanglement in the system as the Forster parameter is varied.
  arXiv  Detail & Related papers  (2023-09-19T23:04:09Z)
• A quantum Stirling heat engine operating in finite time [0.0]
  We analyze the thermodynamics of a quantum Stirling engine operating in finite time. In the limit of slow operation of the cycle and low temperature, the efficiency of such an engine approaches Carnot efficiency.
  arXiv  Detail & Related papers  (2023-07-24T18:30:59Z)
• 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)
• Efficiency at maximum power of a Carnot quantum information engine [68.8204255655161]
  We introduce a finite-time Carnot cycle for a quantum information engine and optimize its power output in the regime of low dissipation. We investigate the optimal performance of a qubit information engine subjected to weak energy measurements.
  arXiv  Detail & Related papers  (2023-01-31T11:18:12Z)
• Powerful ordered collective heat engines [58.720142291102135]
  We introduce a class of engines in which the regime of units operating synchronously can boost the performance. We show that the interplay between Ising-like interactions and a collective ordered regime is crucial to operate as a heat engine.
  arXiv  Detail & Related papers  (2023-01-16T20:14:19Z)
• The problem of engines in statistical physics [62.997667081978825]
  Engines are open systems that can generate work cyclically, at the expense of an external disequilibrium. Recent advances in the theory of open quantum systems point to a more realistic description of autonomous engines. We show how the external loading force and the thermal noise may be incorporated into the relevant equations of motion.
  arXiv  Detail & Related papers  (2021-08-17T03:59:09Z)
• Collective effects on the performance and stability of quantum heat engines [62.997667081978825]
  Recent predictions for quantum-mechanical enhancements in the operation of small heat engines have raised renewed interest. One essential question is whether collective effects may help to carry enhancements over larger scales. We study how power, efficiency and constancy scale with the number of spins composing the engine.
  arXiv  Detail & Related papers  (2021-06-25T18:00:07Z)
• The Quantum Otto Heat Engine with a relativistically moving thermal bath [0.0]
  We investigate the quantum thermodynamic cycle of a quantum heat engine carrying out an Otto thermodynamic cycle. The efficiency at maximum power depends on the nature of the working medium.
  arXiv  Detail & Related papers  (2021-04-14T03:36:55Z)
• Maximal power for heat engines: role of asymmetric interaction times [110.83289076967895]
  We introduce the idea of adjusting the interaction time asymmetry in order to optimize the engine performance. Distinct optimization protocols are analyzed in the framework of thermodynamics.
  arXiv  Detail & Related papers  (2020-12-16T22:26:14Z)
• Study of quantum Otto heat engine using driven-dissipative Schr\"{o}dinger equation [2.2559617939136505]
  We study the dynamics of the quantum Otto heat engine using the driven-dissipative Schr"odinger equation. We propose a new quantum engine working in a single reservoir to convert the pump energy into mechanical work.
  arXiv  Detail & Related papers  (2020-10-10T00:56:23Z)
• Efficiency gain and bidirectional operation of quantum engines with decoupled internal levels [0.0]
  We present a mechanism for efficiency increase in quantum heat engines containing internal energy levels that do not couple to the external work sink. The gain is achieved by using these levels to channel heat in a direction opposite to the one dictated by the second law. A similar mechanism allows the engine to run in reverse and still produce useful work.
  arXiv  Detail & Related papers  (2020-08-26T17:34:36Z)

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.