Optimal work extraction in measurement-based quantum Otto engines: Non-adiabaticity and generalized measurements can be beneficial

• URL: http://arxiv.org/abs/2605.22583v1
• Date: Thu, 21 May 2026 14:54:09 GMT
• Title: Optimal work extraction in measurement-based quantum Otto engines: Non-adiabaticity and generalized measurements can be beneficial
• Abstract summary: Measurement-based quantum heat engines have attracted significant interest as alternatives to conventional thermal engines.<n>We study the optimal work extractable from such engines, including whether their performance can surpass that of conventional quantum Otto cycles.
• Score: 0.6708084920766263
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Measurement-based quantum heat engines have attracted significant interest as alternatives to conventional thermal engines, as they replace the hot thermal reservoir with quantum measurements, thereby offering greater controllability and simpler implementation. Motivated by these advantages, we investigate a measurement-driven quantum Otto engine with a qubit working substance and study the optimal work extractable from such engines, including whether their performance can surpass that of conventional quantum Otto cycles. We analyze the engine in both the infinite-time (adiabatic) and finite-time (non-adiabatic) regimes, considering two distinct implementations obtained through optimization over all projection-valued measurements (PVMs) and over all two-outcome positive operator-valued measurements (POVMs). We show that measurement-based engines can outperform conventional quantum Otto engines within specific parameter regimes and that POVM-based engines can yield higher optimal work extraction than PVM-based ones. Furthermore, by incorporating the thermodynamic cost associated with resetting the auxiliary system required for POVM implementation, we demonstrate that the resulting net work output can still exceed that of PVM-based engines under suitable conditions on the spectral gaps and cold bath temperature. We also identify regimes in which non-adiabatic implementations can yield higher work output and efficiency than their adiabatic counterparts. Our study provides operational guidelines for designing improved measurement-driven quantum Otto engines.

Related papers

• Squeezing-Fueled Quantum Otto Engine via Measurement-Induced Cooling: The Two-Qubit Quantum Rabi Model [0.0]
  Engine operates with two qubits as the working substance and a single non-Markovian hot thermal bath.<n>In place of a conventional cold thermal reservoir, the cooling stroke is realized through a measurement protocol on the cavity mode.<n>A squeezing drive applied to the cavity mode serves as a quantum fuel.
  arXiv  Detail & Related papers  (2026-08-03T17:17:31Z)
• Optimal measurement-based quantum thermal machines in a finite-size system [0.0]
  We present a measurement-based quantum thermal machine that extracts work from generalized quantum measurements.<n>We derive universal optimization criteria for a three-stroke measurement-based engine cycle with coupled two-level system of Ising-like interaction as a working medium.
  arXiv  Detail & Related papers  (2026-03-26T07:51:16Z)
• Limitations of strong coupling in non-Markovian quantum thermometry [9.399766062432928]
  We investigate quantum thermometry using a single-qubit probe embedded in a non-Markovian environment.<n>Our results reveal fundamental constraints and opportunities in quantum thermometry.
  arXiv  Detail & Related papers  (2025-10-02T02:20:44Z)
• Optimising finite-time quantum information engines using Pareto bounds [0.0]
  Information engines harness measurement and feedback to convert energy into useful work.<n>We investigate the fundamental trade-offs between ergotropic output power, thermodynamic efficiency and information-to-work conversion efficiency in such engines.
  arXiv  Detail & Related papers  (2025-07-01T12:24:13Z)
• 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)
• A finite-time quantum Otto engine with tunnel coupled one-dimensional Bose gases [0.0]
  We study a finite-time quantum Otto engine cycle driven by inter-particle interactions in a weakly interacting Bose gas. We find that, unlike a uniform 1D Bose gas, a harmonically trapped quasicondensate cannot operate purely as a emphheat engine.
  arXiv  Detail & Related papers  (2024-04-25T09:54:21Z)
• Quantum many-body thermal machines enabled by atom-atom correlations [0.0]
  We study a class of quantum many-body thermal machines whose operation is directly enabled by second-order atom-atom correlations in an ultracold atomic gas.<n>We show that operating these thermal machines in the intended regimes, such as a heat engine, refrigerator, thermal accelerator, or heater, would be impossible without such atom-atom correlations.
  arXiv  Detail & Related papers  (2023-08-10T00:35:47Z)
• 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)
• Correlation-boosted quantum engine: A proof-of-principle demonstration [0.0]
  We design and implement a non-classically correlated SWAP heat engine that allows to achieve an efficiency above the standard Carnot limit. The boosted efficiency arises from a trade-off between the entropy production and the consumption of quantum correlations. We implement a proof-of-principle demonstration of the engine efficiency enhancement by effectively tailoring the thermal engine on a cloud quantum processor.
  arXiv  Detail & Related papers  (2022-11-21T13:38:54Z)
• Universal optimization efficiency and bounds of Carnot-like heat engines and refrigerators under shortcuts to isothermality [14.447246922181003]
  We derive the universal optimization efficiency of heat engines and the optimization of performance of refrigerators under two unified optimization criterions. We also derived the universal lower and upper bounds for heat engines and refrigerators, and found that these bounds can be reached under extremely asymmetric cases.
  arXiv  Detail & Related papers  (2022-11-02T02:23:24Z)
• Performance of quantum heat engines via adiabatic deformation of potential [15.537505503734646]
  We show that an adiabatic deformation may alter operation mode and enhance machine performance by increasing output work and efficiency. If the heat engine operates under maximal power by optimizing the control parameter, the efficiency shows certain universal behavior.
  arXiv  Detail & Related papers  (2022-02-14T12:07:50Z)
• 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)
• 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)
• Optimal non-classical correlations of light with a levitated nano-sphere [34.82692226532414]
  Nonclassical correlations provide a resource for many applications in quantum technology. Optomechanical systems can generate nonclassical correlations between the mechanical mode and a mode of travelling light. We propose automated optimization of the production of quantum correlations in such a system.
  arXiv  Detail & Related papers  (2020-06-26T15:27:47Z)
• Performance of quantum heat engines under the influence of long-range interactions [8.402742655847774]
  We examine a quantum heat engine with an interacting many-body working medium consisting of the long-range Kitaev chain. By analytically studying two type of thermodynamic cycles, namely Otto cycle and Stirling cycle, we demonstrate that the work output and efficiency of long-range interacting heat engine can be boosted by long-range interactions.
  arXiv  Detail & Related papers  (2020-03-30T11:38:52Z)

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.