Annals of Physics最新文献

{"title":"Thermal stability and criticality of quadratic Gaussian space–time","authors":"K. Ghaderi ,&nbsp;B. Malekolkalami ,&nbsp;Anirudh Pradhan","doi":"10.1016/j.aop.2024.169910","DOIUrl":"10.1016/j.aop.2024.169910","url":null,"abstract":"<div><div>The investigation conducted in this study focuses on the phase structure, critical points, and stability of a novel regular pure quadratic Gaussian black hole. Gaussian black holes are a significant category of regular black holes, representing a set of spherically symmetric static solutions derived from Einstein’s equations in the presence of the cosmological constant. The research explores the thermodynamic properties of these black holes within the framework of pure quadratic modified gravity. By applying the laws of black hole thermodynamics, various quantities such as Hawking temperature, equation of state, and Gibbs free energy are analyzed. Moreover, the study examines the phase transitions of such black holes, accompanied by graphical representations of the relevant quantities. Based on the critical points identified, the stability and phase transition behavior of the system are evaluated. The investigation also delves into the assessment of stability, instability, and the Swallowtail behavior exhibited by the system. Also the presence of a discontinuity in the heat capacity leads to a phase transition within the system, reminiscent of Van der Waals-like phase transitions observed between small-large black holes.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"473 ","pages":"Article 169910"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149603","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}

{"title":"Motion of test particles around an Einstein–dilaton–Gauss–Bonnet black hole in a uniform magnetic field","authors":"Romel M. Vargas ,&nbsp;M.A. Cuyubamba","doi":"10.1016/j.aop.2024.169907","DOIUrl":"10.1016/j.aop.2024.169907","url":null,"abstract":"<div><div>In this work, we study the motion of a magnetized particle orbiting a static and spherically symmetric black hole immersed in an external asymptotically uniform magnetic field in Einstein–dilaton–Gauss–Bonnet gravity. Similar to the Schwarzschild case, the magnetic interaction creates a region that allows circular stable orbits near the photonic sphere, however, we show that regions in which there are no allowed solutions for circular orbits appear before the marginal stability is reached for weak magnetic interaction, namely, new criteria mark the frontier of the region of stable circular orbits for EdGB black holes. The regions of allowed stable circular orbits were calculated for different values of the dilaton–Gauss–Bonnet coupling <span><math><mi>p</mi></math></span> and magnetic coupling parameter <span><math><mi>β</mi></math></span>, concluding that the increase of <span><math><mi>p</mi></math></span> reduces the regions of stable circular orbits. The calculations were carried out using numerical black hole solutions and were compared with an analytical approximation with an error below 5% for <span><math><mrow><mi>p</mi><mo>&lt;</mo><mn>0</mn><mo>.</mo><mn>25</mn></mrow></math></span>.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"473 ","pages":"Article 169907"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149604","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}

{"title":"Displacement memory for flyby","authors":"P.M. Zhang ,&nbsp;Q.L. Zhao ,&nbsp;J. Balog ,&nbsp;P.A. Horvathy","doi":"10.1016/j.aop.2024.169890","DOIUrl":"10.1016/j.aop.2024.169890","url":null,"abstract":"<div><div>Zel’dovich and Polnarev, in their seminal paper (Zel’dovich and Polnarev, 1974) suggested that a gravitational wave generated by flyby would merely displace the particles. We confirm their prediction numerically by fine-tuning the wave profile proposed by Gibbons and Hawking (1971), and then analytically for its approximation by a Pöschl–Teller potential. Higher-order derivative profiles proposed for gravitational collapse, etc (Gibbons and Hawking, 1971) are shortly discussed.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"473 ","pages":"Article 169890"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143099310","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}

{"title":"Note on rotational properties of position operators of massless particles","authors":"Michał Dobrski","doi":"10.1016/j.aop.2024.169901","DOIUrl":"10.1016/j.aop.2024.169901","url":null,"abstract":"<div><div>Nonlinear action of the group of spatial rotations on commuting components of a position operator of a massless particle of arbitrary helicity is studied. It is shown that linearization of this action necessarily leads to the Pryce operator with non-commuting components. The problem is also analyzed from a geometric perspective using Callan, Coleman, Wess and Zumino method.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"473 ","pages":"Article 169901"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143100981","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}

{"title":"Electrodynamic excitation of electrons","authors":"Dhiraj Sinha","doi":"10.1016/j.aop.2024.169893","DOIUrl":"10.1016/j.aop.2024.169893","url":null,"abstract":"<div><div>In light–matter interaction, the energy of electrons is dependent on the frequency of radiation rather than its intensity. It is explained by assuming that light comprises of quantised packets of energy or photons whose energy is a product of its frequency and Planck’s constant. Here we explore the role of electromagnetic field coupling in the phenomenological origin of electrodynamic excitation of electrons. We show that electromagnetic radiation imparts an electric potential energy to an electron which is proportional to the product of the angular frequency of radiation field, magnetic flux and the magnitude of electron charge. While assuming magnetic flux quantisation and phasor representation of electromagnetic fields, the mathematical expression of the energy of a photon, as well as Planck’s constant, have been derived using the principles of classical electromagnetism. It implies that the particle like behaviour of electromagnetic radiation under interaction with matter emerges as a consequence of magnetic flux quantisation and discrete energy transfer to charges.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"473 ","pages":"Article 169893"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149606","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}

{"title":"Investigating quantum criticality through charged scalar fields near the BTZ black hole horizon","authors":"Abdullah Guvendi ,&nbsp;Omar Mustafa","doi":"10.1016/j.aop.2024.169897","DOIUrl":"10.1016/j.aop.2024.169897","url":null,"abstract":"<div><div>We examine a charged scalar field with a position-dependent mass <span><math><mrow><mi>m</mi><mrow><mo>(</mo><mi>ρ</mi><mo>)</mo></mrow><mo>=</mo><msub><mrow><mi>m</mi></mrow><mrow><mn>0</mn></mrow></msub><mo>+</mo><mi>S</mi><mrow><mo>(</mo><mi>ρ</mi><mo>)</mo></mrow></mrow></math></span>, where <span><math><mrow><mi>S</mi><mrow><mo>(</mo><mi>ρ</mi><mo>)</mo></mrow></mrow></math></span> represents a Lorentz scalar potential, near a BTZ black hole in the presence of an external magnetic field. By deriving the Klein–Gordon equation for this setup, we explore two scenarios: (i) a mass-modified scalar field with <span><math><mrow><mi>m</mi><mrow><mo>(</mo><mi>ρ</mi><mo>)</mo></mrow><mo>=</mo><msub><mrow><mi>m</mi></mrow><mrow><mn>0</mn></mrow></msub><mo>−</mo><mi>a</mi><mo>/</mo><mi>ρ</mi></mrow></math></span> (an exactly solvable case), and (ii) a scenario involving both mass modification and an external magnetic field (conditionally exactly solvable). We identify quantum critical points (QCPs) associated with the coupling constant <span><math><mi>a</mi></math></span>. In the first scenario, for massless charged scalar fields, critical points occur at <span><math><mrow><mi>a</mi><mo>=</mo><mi>n</mi><mo>+</mo><mn>1</mn><mo>/</mo><mn>2</mn></mrow></math></span> for all radial quantum numbers <span><math><mrow><mi>n</mi><mo>≥</mo><mn>0</mn></mrow></math></span> and magnetic quantum numbers <span><math><mrow><mrow><mo>|</mo><mi>m</mi><mo>|</mo></mrow><mo>≥</mo><mn>0</mn></mrow></math></span>. In the second scenario, these critical points shift to <span><math><mrow><mi>a</mi><mo>=</mo><mi>n</mi><mo>+</mo><mn>3</mn><mo>/</mo><mn>2</mn></mrow></math></span> for <span><math><mrow><mi>n</mi><mo>≥</mo><mn>0</mn></mrow></math></span> and <span><math><mrow><mrow><mo>|</mo><mi>m</mi><mo>|</mo></mrow><mo>&gt;</mo><mn>0</mn></mrow></math></span>, with the case <span><math><mrow><mi>m</mi><mo>=</mo><mn>0</mn></mrow></math></span> excluded. For massive scalar fields, QCPs emerge at <span><math><mrow><mi>a</mi><mo>=</mo><mrow><mo>(</mo><mi>n</mi><mo>+</mo><mn>1</mn><mo>/</mo><mn>2</mn><mo>)</mo></mrow><mo>/</mo><mn>2</mn></mrow></math></span>, leading to non-propagating fields at zero frequency. At these QCPs, the field frequencies drop to zero, marking transitions from stable oscillatory modes to non-propagating states. Below the critical points, the system exhibits instability, characterized by negative imaginary frequencies that suggest rapid decay and high dissipation. Above the critical points, the modes stabilize and propagate, indicating a transition to a superconducting-like phase, where dissipation vanishes and stable excitations dominate.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"473 ","pages":"Article 169897"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149609","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}

{"title":"Weyl cohomology and the conformal anomaly in the presence of torsion","authors":"Gregorio Paci,&nbsp;Omar Zanusso","doi":"10.1016/j.aop.2024.169877","DOIUrl":"10.1016/j.aop.2024.169877","url":null,"abstract":"<div><div>Using cohomological methods, we identify both trivial and nontrivial contributions to the conformal anomaly in the presence of vectorial torsion in <span><math><mrow><mi>d</mi><mo>=</mo><mn>2</mn><mo>,</mo><mn>4</mn></mrow></math></span> dimensions. In both cases, our analysis considers two scenarios: one in which the torsion vector transforms in an affine way, i.e., it is a gauge potential for Weyl transformations, and the other in which it is invariant under the Weyl group. An important outcome for the former case in both <span><math><mrow><mi>d</mi><mo>=</mo><mn>2</mn><mo>,</mo><mn>4</mn></mrow></math></span> is the presence of anomalies of a “mixed” nature in relation to the classification of Deser and Schwimmer. For invariant torsion in <span><math><mrow><mi>d</mi><mo>=</mo><mn>4</mn></mrow></math></span>, we also find a new type of anomaly which we dub <span><math><mi>Ψ</mi></math></span>-anomaly. Taking these results into account, we integrate the different anomalies to obtain renormalized anomalous effective actions. Thereafter, we recast such actions in the covariant nonlocal and local forms, the latter being easier to work with. Along the way, we pause to comment on the physical usefulness of these effective actions, in particular to obtain renormalized energy–momentum tensors and thermodynamics of <span><math><mrow><mn>2</mn><mi>d</mi></mrow></math></span> black holes.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"473 ","pages":"Article 169877"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Emergent universe in f(Q) gravity theories","authors":"Hamid Shabani ,&nbsp;Avik De ,&nbsp;Tee-How Loo","doi":"10.1016/j.aop.2024.169900","DOIUrl":"10.1016/j.aop.2024.169900","url":null,"abstract":"<div><div>One resolution of the ancient cosmic singularity, i.e., the Big Bang Singularity (BBS), is to assume an inflationary stage preceded by a long enough static state in which the universe and its physical properties would oscillate around certain equilibrium points. The early period is referred to as the Einstein Static (ES) Universe phase, which characterizes a static phase with positive spatial curvature. A stable Einstein static state can serve as a substitute for BBS, followed by an inflationary period known as the Emergent Scenario. The initial need has not been fulfilled within the context of General Relativity, prompting the investigation of modified theories of gravity. The current research aims to find such a solution within the framework of symmetric teleparallel gravity, specifically in the trendy <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>)</mo></mrow></mrow></math></span> theories. An analysis has been conducted to investigate stable solutions for both positively and negatively curved spatial FRW universes, in the presence of a perfect fluid, by utilizing various torsion-free and curvature-free affine connections. Additionally, we propose a method to facilitate an exit from a stable ES to a subsequent inflationary phase. We demonstrate that <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>)</mo></mrow></mrow></math></span> gravity theories have the ability to accurately depict the emergence of the universe.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"473 ","pages":"Article 169900"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143099308","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}

{"title":"Analytical short- and long-range kink-like structures in scalar field models with polynomial interactions","authors":"I. Andrade ,&nbsp;M.A. Marques ,&nbsp;R. Menezes","doi":"10.1016/j.aop.2024.169915","DOIUrl":"10.1016/j.aop.2024.169915","url":null,"abstract":"<div><div>We investigate a class of scalar field models which engender kink-like solutions in the presence of polynomial potentials that allows for modifications of the tails of the localized configurations. We introduce a parameter in the potential that controls the classical mass associated to its minima. By using the first-order framework developed by Bogomol’nyi, we obtain analytical solutions that become more and more interactive as we increase such parameter. By investigating the limit in which the parameter tends to infinite, the kink solution gets power law tails, and we show that this feature is related to the behavior of the classical mass, which vanishes in the aforementioned limit. We also investigate the stability against small fluctuations, with the results unveiling that, depending on the values of the parameter, the stability potential may support several bound states and also, it may attain a volcano-like profile.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"473 ","pages":"Article 169915"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143098527","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}

{"title":"Analyzing the effect of higher dimensions on the black hole silhouette, deflection angles, and PINN approximated quasinormal modes","authors":"Nikko John Leo S. Lobos ,&nbsp;Anele M. Ncube ,&nbsp;Reggie C. Pantig ,&nbsp;Alan S. Cornell","doi":"10.1016/j.aop.2024.169906","DOIUrl":"10.1016/j.aop.2024.169906","url":null,"abstract":"<div><div>This study investigates the effects of higher dimensions on the observable properties of Schwarzschild-Tangherlini black holes, focusing on the photonsphere, shadow radius, deflection angles, and quasinormal modes (QNMs). By extending classical methods with Physics-Informed Neural Networks (PINNs), the research examines how increasing dimensionality alters these properties, causing shadow size reduction, weaker deflection angles, and shifts in QNM frequencies. The findings suggest that as black holes increase in dimensionality, their gravitational influence diminishes, particularly affecting light deflection and the stability of photon orbits. Through both weak and strong deflection analyses, this study indicates the need for ultrasensitive technology to detect these higher-dimensional signatures. Remarks on the observational data constraints currently favor four-dimensional spacetime; however, the exploration of additional dimensions remains vital in advancing models of quantum gravity. This work provides a theoretical framework for understanding black hole behavior in higher dimensions, potentially informing future astrophysical observations.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"473 ","pages":"Article 169906"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143098963","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}