Annals of Physics最新文献_第8页

Quantum unital Otto heat engines: Using Kirkwood–Dirac quasi-probability for the engine’s coherence to stay alive

IF 3 3区物理与天体物理

Annals of Physics Pub Date : 2025-02-01 DOI: 10.1016/j.aop.2024.169889

Abdelkader El Makouri , Abdallah Slaoui , Rachid Ahl Laamara

{"title":"Quantum unital Otto heat engines: Using Kirkwood–Dirac quasi-probability for the engine’s coherence to stay alive","authors":"Abdelkader El Makouri , Abdallah Slaoui , Rachid Ahl Laamara","doi":"10.1016/j.aop.2024.169889","DOIUrl":"10.1016/j.aop.2024.169889","url":null,"abstract":"<div><div>In this work, we consider <em>quantum unital Otto heat engines</em>. The latter refers to the fact that both the unitaries of the adiabatic strokes and the source of the heat provided to the engine preserve the maximally mixed state. We show how to compute the cumulants of either the dephased or undephased engine. For a qubit, we give the analytical expressions of the averages and variances for arbitrary unitaries and unital channels. We do a detailed comparative study between the dephased and undephased heat engines. More precisely, we focus on the effect of the parameters on the average work and its reliability and efficiency. As a case study of unital channels, we consider a quantum projective measurement. We show on which basis we should projectively measure the qubit, either the dephased or undephased heat engine, to extract higher amounts of work, increase the latter’s reliability, and increase efficiency. Further, we show that non-adiabatic transitions <em>are not always detrimental</em> to thermodynamic quantities. Our results, we believe, are important for heat engines fueled by <em>quantum measurement</em>.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"473 ","pages":"Article 169889"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stability and thermodynamic geometry of black hole in generalized entropy framework

IF 3 3区物理与天体物理

Annals of Physics Pub Date : 2025-02-01 DOI: 10.1016/j.aop.2024.169875

Abdul Jawad , Hamza Tariq , Shahid Chaudhary , Qiang Wu

引用次数: 0

Hyperbolic polytrope

IF 3 3区物理与天体物理

Annals of Physics Pub Date : 2025-02-01 DOI: 10.1016/j.aop.2024.169909

M. Carrasco-H , E. Contreras , E. Fuenmayor , P. León

{"title":"Hyperbolic polytrope","authors":"M. Carrasco-H , E. Contreras , E. Fuenmayor , P. León","doi":"10.1016/j.aop.2024.169909","DOIUrl":"10.1016/j.aop.2024.169909","url":null,"abstract":"<div><div>In this work, we study self-gravitating objects that obey a polytropic equation of state in hyperbolic symmetry. Specifically, we describe in detail the steps to derive the Lane-Emden equation from the structure equations of the system. To integrate the equations numerically, we propose the Cosenza-Herrera-Esculpi-Witten anisotropy and study the cases <span><math><mrow><mi>γ</mi><mo>≠</mo><mn>1</mn></mrow></math></span> and <span><math><mrow><mi>γ</mi><mo>=</mo><mn>1</mn></mrow></math></span> in the parameter space of the models. We find that the matter sector exhibits the usual and expected behavior for certain values in this parameter space: energy density (in absolute value) and radial pressure are decreasing functions and vanish at the surface, while the mass function is increasing towards the surface. We find that the anisotropy of the system is positive and decreasing, consistent with the behavior of the radial pressure, which reaches a local minimum at the surface (i.e., the pressure gradient is zero at the surface). We also study the compactness of the dense objects as a function of the polytropic index and obtain that it has an upper bound given by the maximum value it reaches for a certain <span><math><mi>n</mi></math></span>. Some extensions of the work and future proposals are discussed.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"473 ","pages":"Article 169909"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Time evolution in canonical quantum gravity is trivial

IF 3 3区物理与天体物理

Annals of Physics Pub Date : 2025-02-01 DOI: 10.1016/j.aop.2024.169894

Ali Kaya

引用次数: 0

Physical validity of anisotropic models derived from isotropic fluid dynamics in f(R,T) theory: An implication of gravitational decoupling

IF 3 3区物理与天体物理

Annals of Physics Pub Date : 2025-02-01 DOI: 10.1016/j.aop.2024.169886

Tayyab Naseer , G. Mustafa

{"title":"Physical validity of anisotropic models derived from isotropic fluid dynamics in f(R,T) theory: An implication of gravitational decoupling","authors":"Tayyab Naseer , G. Mustafa","doi":"10.1016/j.aop.2024.169886","DOIUrl":"10.1016/j.aop.2024.169886","url":null,"abstract":"<div><div>In this paper, we derive multiple anisotropic analogs from the established isotropic model by means of the gravitational decoupling approach in a fluid-geometry interaction based theory. To accomplish this, we initially consider a static spherical perfect-fluid configuration and then introduce a new matter source to induce anisotropic behavior in the system. The resulting field equations encapsulate the entire matter distribution and thus become much complicated. We then split these equations into two sets through implementing a particular transformation, each set delineating characteristics attributed to their original fluid sources. We adopt the Heintzmann’s ansatz and some constraints on extra gravitating source to deal with the first and second systems of equations, respectively. Furthermore, the two fundamental forms of the matching criteria are used to make the constant in the considered solution known. By utilizing the preliminary information of a star candidate LMC X-4, we assess the physical validity of the developed models. Our analysis indicates that both our models exhibit characteristics which are well-agreed with the acceptability criteria for certain parametric values.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"473 ","pages":"Article 169886"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143099314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The extreme Reissner–Nordström Black Hole: New exact solutions to the Klein–Gordon equation with minimal coupling

IF 3 3区物理与天体物理

Annals of Physics Pub Date : 2025-02-01 DOI: 10.1016/j.aop.2024.169898

David Senjaya , Supakchai Ponglertsakul

{"title":"The extreme Reissner–Nordström Black Hole: New exact solutions to the Klein–Gordon equation with minimal coupling","authors":"David Senjaya , Supakchai Ponglertsakul","doi":"10.1016/j.aop.2024.169898","DOIUrl":"10.1016/j.aop.2024.169898","url":null,"abstract":"<div><div>The omission of numerical methods to solve the Klein–Gordon equation with extremal black holes background is a well known problem. The difficulty forces the numerical investigation stop short at the near-extremal limit. In this work, we present a novel exact scalar quasibound states solutions in the extremal Reissner–Nordström black hole background. We start with the construction of the Klein–Gordon equation with minimal coupling in the extremal Reissner–Nordström black hole background and applying the separation of variables ansatz. We successfully find and present the exact solutions to the radial Klein–Gordon equation in the terms of the double confluent Heun functions. The exact eigenfrequencies expression of the scalar field bound to the extremal Reissner–Nordström black hole background, i.e., the quasibound states frequency, is subsequently determined by applying the polynomial condition to the double confluent Heun function. By utilizing the obtained exact quasibound states formula, we present an analytic proof to the nonexistence of charged scalar cloud in the extreme Reissner–Nordström black hole. And lastly, for the sake of completeness of the investigation, by utilizing the obtained exact radial wave function, we re-investigate the Hawking radiation and present a derivation to the extremal black hole horizon’s zero Hawking temperature via the Damour–Ruffini formulation.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"473 ","pages":"Article 169898"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Discussion on the weak equivalence principle for a Schwarzschild gravitational field based on the light-clock model

IF 3 3区物理与天体物理

Annals of Physics Pub Date : 2025-02-01 DOI: 10.1016/j.aop.2024.169903

Guoxu Feng , Songjuan Yu , Tianzhe Wang , Zheng Zhang

引用次数: 0

Local short-time acceleration induced spectral line broadening and possible implications in cosmology

IF 3 3区物理与天体物理

Annals of Physics Pub Date : 2025-02-01 DOI: 10.1016/j.aop.2024.169899

M.J. Luo

引用次数: 0

On new regular charged black hole solutions: Limiting Curvature Condition, Quasinormal modes and Shadows

IF 3 3区物理与天体物理

Annals of Physics Pub Date : 2025-02-01 DOI: 10.1016/j.aop.2024.169865

Leonardo Balart , Grigoris Panotopoulos , Ángel Rincón

引用次数: 0

Probability of presence versus ψ∗(x,t)ψ(x,t)

IF 3 3区物理与天体物理

Annals of Physics Pub Date : 2025-01-31 DOI: 10.1016/j.aop.2025.169935

Frank Wilczek , Zara Yu

{"title":"Probability of presence versus ψ∗(x,t)ψ(x,t)","authors":"Frank Wilczek , Zara Yu","doi":"10.1016/j.aop.2025.169935","DOIUrl":"10.1016/j.aop.2025.169935","url":null,"abstract":"<div><div>Postulating the identification of <span><math><mrow><msup><mrow><mi>ψ</mi></mrow><mrow><mo>∗</mo></mrow></msup><mrow><mo>(</mo><mi>x</mi><mo>,</mo><mi>t</mi><mo>)</mo></mrow><mi>ψ</mi><mrow><mo>(</mo><mi>x</mi><mo>,</mo><mi>t</mi><mo>)</mo></mrow></mrow></math></span> with a physical probability density is unsatisfactory conceptually and overly limited practically. For electrons, there is a simple, calculable relativistic correction proportional to <span><math><mrow><mo>∇</mo><msup><mrow><mi>ψ</mi></mrow><mrow><mo>∗</mo></mrow></msup><mi>⋅</mi><mo>∇</mo><mi>ψ</mi></mrow></math></span>. In particular, zeroes of the wave function do not indicate vanishing probability density of presence. We derive a correction of this kind from a Lagrangian, in a form suitable for wide generalization and use in effective field theories. Thus we define a large new class of candidate models for (quasi-)particles and fields, featuring modified <em>kinetic</em> terms. We solve for the stationary states and energy spectrum in some representative problems, finding striking effects including the emergence of negative effective mass at high energy and of localization by energy.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"475 ","pages":"Article 169935"},"PeriodicalIF":3.0,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143144521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0