Related papers: Work as an external quantum observable and an operational quantum work fluctuation theorem

Work as an external quantum observable and an operational quantum work fluctuation theorem

URL: http://arxiv.org/abs/2003.06437v2
Date: Tue, 6 Oct 2020 15:25:17 GMT
Title: Work as an external quantum observable and an operational quantum work fluctuation theorem
Authors: Konstantin Beyer, Kimmo Luoma, and Walter T. Strunz
Abstract summary: We argue that quantum work fluctuation theorems which rely on the knowledge of $H_mathcalS$ are of little practical relevance, contrary to their classical counterparts. We derive a fluctuation theorem which is operationally accessible and could in principle be implemented in experiments to determine bounds on free energy differences of unknown systems.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: We propose a definition of externally measurable quantum work in driven systems. Work is given as a quantum observable on a control device which is forcing the system and can be determined without knowledge of the system Hamiltonian $H_\mathcal{S}$. We argue that quantum work fluctuation theorems which rely on the knowledge of $H_\mathcal{S}$ are of little practical relevance, contrary to their classical counterparts. Using our framework, we derive a fluctuation theorem which is operationally accessible and could in principle be implemented in experiments to determine bounds on free energy differences of unknown systems.

Related papers

Thermodynamics of a Quantum Subsystem [0.0]
We analyze the thermodynamics of a quantum subsystem driven quasi-statically by external forces. We show that the thermodynamic functions of a quantum subsystem can be defined dynamically in terms of its local spectrum.
arXiv Detail & Related papers (2024-10-22T06:06:20Z)
Operational work fluctuation theorem for open quantum systems [0.0]
We propose a quantum fluctuation theorem that is valid for externally measurable quantum work determined during the driving protocol. Our theorem comes in the form of an inequality and therefore only yields bounds to the true free energy difference.
arXiv Detail & Related papers (2024-08-24T01:01:50Z)
A refinement of the argument of local realism versus quantum mechanics by algorithmic randomness [0.0]
In quantum mechanics, the notion of probability plays a crucial role. In modern mathematics, probability theory means nothing other than measure theory. We present a refinement of the Born rule, called the principle of typicality, for specifying the property of results of measurements in an operational way.
arXiv Detail & Related papers (2023-12-20T18:22:42Z)
Fluctuation theorems for genuine quantum mechanical regimes [0.0]
We look for corrections to work fluctuations theorems when the acting system is allowed to enter the quantum domain. For some specific processes, we derive several fluctuation theorems within both the quantum and classical statistical arenas.
arXiv Detail & Related papers (2022-11-29T13:14:30Z)
Correspondence Between the Energy Equipartition Theorem in Classical Mechanics and its Phase-Space Formulation in Quantum Mechanics [62.997667081978825]
In quantum mechanics, the energy per degree of freedom is not equally distributed. We show that in the high-temperature regime, the classical result is recovered.
arXiv Detail & Related papers (2022-05-24T20:51:03Z)
Quantum mechanical work [0.0]
We treat work as a quantum mechanical observable with a well defined classical limit. This paves the way for frameworks involving quantum superposition and nonlocal steering of work. We also show that two-point measurement protocols can be inappropriate to describe work.
arXiv Detail & Related papers (2021-07-26T19:09:50Z)
Observers of quantum systems cannot agree to disagree [55.41644538483948]
We ask whether agreement between observers can serve as a physical principle that must hold for any theory of the world. We construct examples of (postquantum) no-signaling boxes where observers can agree to disagree.
arXiv Detail & Related papers (2021-02-17T19:00:04Z)
Information Scrambling in Computationally Complex Quantum Circuits [56.22772134614514]
We experimentally investigate the dynamics of quantum scrambling on a 53-qubit quantum processor. We show that while operator spreading is captured by an efficient classical model, operator entanglement requires exponentially scaled computational resources to simulate.
arXiv Detail & Related papers (2021-01-21T22:18:49Z)
Quantum Non-equilibrium Many-Body Spin-Photon Systems [91.3755431537592]
dissertation concerns the quantum dynamics of strongly-correlated quantum systems in out-of-equilibrium states. Our main results can be summarized in three parts: Signature of Critical Dynamics, Driven Dicke Model as a Test-bed of Ultra-Strong Coupling, and Beyond the Kibble-Zurek Mechanism.
arXiv Detail & Related papers (2020-07-23T19:05:56Z)
Entropic Uncertainty Relations and the Quantum-to-Classical transition [77.34726150561087]
We aim to shed some light on the quantum-to-classical transition as seen through the analysis of uncertainty relations. We employ entropic uncertainty relations to show that it is only by the inclusion of imprecision in our model of macroscopic measurements that we can prepare a system with two simultaneously well-defined quantities.
arXiv Detail & Related papers (2020-03-04T14:01:17Z)
Quantum Mechanical description of Bell's experiment assumes Locality [91.3755431537592]
Bell's experiment description assumes the (Quantum Mechanics-language equivalent of the classical) condition of Locality. This result is complementary to a recently published one demonstrating that non-Locality is necessary to describe said experiment. It is concluded that, within the framework of Quantum Mechanics, there is absolutely no reason to believe in the existence of non-Local effects.
arXiv Detail & Related papers (2020-02-27T15:04:08Z)

This list is automatically generated from the titles and abstracts of the papers in this site.