Nuclear Physics B最新文献

{"title":"Fractional vorticity, Bogomol'nyi-Prasad-Sommerfield systems and complex structures for the (generalized) spinor Gross-Pitaevskii equations","authors":"Fabrizio Canfora ,&nbsp;Pablo Pais","doi":"10.1016/j.nuclphysb.2025.116955","DOIUrl":"10.1016/j.nuclphysb.2025.116955","url":null,"abstract":"<div><div>The (generalized) Gross-Pitaevskii equation (GPE) for a complex scalar field in two spatial dimensions is analyzed. It is shown that there is an infinite family of self-interaction potentials which admit Bogomol'nyi-Prasad-Sommerfield (BPS) bounds together with the corresponding first-order BPS systems. For each member of this family, the solutions of the first-order BPS systems are automatically solutions of the corresponding second-order generalized GPE. The simplest topologically non-trivial solutions of these first-order BPS systems describe configurations with quantized fractional vorticity. The corresponding fraction is related to the degree of non-linearity. The case in which the self-interaction potential is of order six (namely <span><math><mo>|</mo><mi>Ψ</mi><msup><mrow><mo>|</mo></mrow><mrow><mn>6</mn></mrow></msup></math></span>, which is a relevant theory both in relativistic quantum field theories in <span><math><mo>(</mo><mn>2</mn><mo>+</mo><mn>1</mn><mo>)</mo></math></span> dimensions in connection with the quantum Hall effect as well as in the theory of the supersolids) is analyzed in detail. Such formalism can also be extended to the case of quantum mixtures with multi-component GPEs. The relationship between these techniques and supersymmetry will be discussed. In particular, despite several common features, we will show that there are multi-component GPEs that are not supersymmetric (at least, not in the standard sense) and possess a BPS system of the above type.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116955"},"PeriodicalIF":2.5,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144099527","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":"Exploring geodesics, quantum fields and thermodynamics of Schwarzschild-AdS black hole with a global monopole in non-commutative geometry","authors":"Faizuddin Ahmed ,&nbsp;Ahmad Al-Badawi ,&nbsp;İzzet Sakallı","doi":"10.1016/j.nuclphysb.2025.116951","DOIUrl":"10.1016/j.nuclphysb.2025.116951","url":null,"abstract":"<div><div>This work presents a comprehensive analysis of the geodesic motion, scalar field perturbations, and thermodynamic behavior of a static, spherically symmetric black hole solution arising within the framework of non-commutative geometry and incorporating the presence of a global monopole. The study is motivated by the interplay between quantum gravity effects (modeled via non-commutative geometry) and topological defects such as global monopoles, both of which contribute to significant deviations from classical black hole solutions. We begin by formulating the effective potential governing the motion of test particles-both massive and massless-in the modified spacetime. The effects of the non-commutative parameter and the global monopole are systematically examined in the context of various key features: the photon sphere radius, light deflection angle, stability of circular orbits, and the innermost stable circular orbit (ISCO). Our results show that the presence of the non-commutative structure enlarges the photon sphere radius and increases the deflection of light, while simultaneously destabilizing circular orbits. Furthermore, we observe that the ISCO radius is highly sensitive to the global monopole parameter, with a noticeable increase for certain ranges of the non-commutative parameter. These findings suggest that non-commutative geometry and topological defects significantly affect the observable properties of black hole environments. In the second part of the study, we explore linear perturbations of a massless scalar field by solving the Klein-Gordon equation in the background spacetime. The resulting effective potential for scalar perturbations is shown to be deeply influenced by both the non-commutative geometry and the global monopole, modifying the scattering and decay characteristics of the scalar field. By employing the eikonal approximation, we compute the complex quasinormal mode (QNM) frequencies and analyze how their real and imaginary parts evolve with changes in the underlying parameters. The results provide insight into the stability of the black hole under perturbations and offer potential observational signatures of non-commutative and monopole-induced corrections. Finally, the thermodynamic properties of the black hole are investigated. We derive the expressions for the Hawking temperature, specific heat, and Gibbs free energy, showing how these quantities deviate from their counterparts in the standard Schwarzschild solution. Notably, we find that the introduction of a non-commutative structure and global monopole leads to non-trivial modifications in the thermodynamic phase structure. In particular, the black hole may exhibit modified thermal stability and phase transitions depending on the values of the non-commutative and monopole parameters.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116951"},"PeriodicalIF":2.5,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143947641","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":"Spin precession frequencies of a test gyroscope around a naked singularity and quasi-periodic oscillations","authors":"Tehreem Zahra ,&nbsp;Mubasher Jamil ,&nbsp;Mustapha Azreg-Aïnou","doi":"10.1016/j.nuclphysb.2025.116954","DOIUrl":"10.1016/j.nuclphysb.2025.116954","url":null,"abstract":"<div><div>Various studies show that the gravitational collapse of inhomogeneous matter clouds leads to naked singularity formation. We investigate here the spin precession frequency of a test gyroscope attached to a stationary observer in a rotating naked singularity spacetime. In the weak field limit, Lense-Thirring precession for rotating naked singularity and geodetic precession in asymptotic limit for null naked singularity are found to be equal to that of a Kerr black hole and a Schwarzschild black hole respectively. In addition, we can distinguish rotating naked singularity and Kerr naked singularity for an observer in the equatorial plane using spin precession. To this end, we have found the constraints on the parameters of rotating naked singularity by employing Monte Carlo Markov Chain simulation and using the observation from five quasi-periodic sources within the relativistic precession model. Our analysis shows that the measurement of spin parameter estimate for GRO J1655-40 is in disagreement with the value found from the continuum-fitting method, while for XTEJ1859+226 and GRS 1915+105, it is inconsistent with spectral analysis results.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116954"},"PeriodicalIF":2.5,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068644","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":"Physical interpretations of integration constants and large gauge effects in flat and AdS spacetimes","authors":"Leyla Ogurol,&nbsp;Bayram Tekin","doi":"10.1016/j.nuclphysb.2025.116953","DOIUrl":"10.1016/j.nuclphysb.2025.116953","url":null,"abstract":"<div><div>As in other partial differential equations, one ends up with some arbitrary constants or arbitrary functions when one integrates Einstein's equations, or more generally field equations of any other gravity. Interpretation of these arbitrary constants and functions as some physical quantities that can in principle be measured is a non-trivial matter. Concentrating on the case of constants, one usually identifies them as conserved mass, momentum, angular momentum, center of mass, or some other hairs of the solution. This can be done via the Arnowitt-Deser-Misner (ADM)-type construction based on pure geometry, and the solution is typically a black hole. Hence, one talks about the black hole mass and angular momentum etc. Here we show that there are several misunderstandings: First of all, the physical interpretation of the constants of a given geometry depends not only on pure geometry, i.e. the metric, but also on the theory under consideration. This becomes quite important, especially when there is a cosmological constant. Secondly, one usually assigns the maximally symmetric spacetime, say the flat or the (anti)-de Sitter spacetime, to have zero mass and angular momentum, and linear momentum. This declares the maximally symmetric spacetime to be the vacuum of the theory, but such an assignment depends on the coordinates in the ADM-type constructions and their extensions: in fact, one can introduce large gauge transformations (new coordinates) which map, say, the flat spacetime to flat spacetime but the resultant flat spacetime can have a nontrivial mass and angular momentum, if the new coordinates are such that the metric components do not decay properly. These issues, which are often overlooked, will be examined in detail, and a resolution, via the use of a divergence-free rank <span><math><mo>(</mo><mn>0</mn><mo>,</mo><mn>4</mn><mo>)</mo></math></span>-tensor, will be shown for the case of anti-de Sitter spacetimes.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116953"},"PeriodicalIF":2.5,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068568","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":"Strange quark stars and condensate dark stars in Bumblebee gravity","authors":"Grigoris Panotopoulos ,&nbsp;Ali Övgün","doi":"10.1016/j.nuclphysb.2025.116956","DOIUrl":"10.1016/j.nuclphysb.2025.116956","url":null,"abstract":"<div><div>In this paper, we investigate the properties of relativistic stars made of isotropic matter within the framework of the minimal Standard Model Extension, where a Bumblebee field (BF) coupled to spacetime induces spontaneous Lorentz symmetry breaking. We adopt analytic equations-of-state describing either condensate dark stars or strange quark stars. We solve the structure equations numerically, and we compute the mass-to-radius relationships. The influence of the Bumblebee parameter <strong>l</strong> is examined in detail, and an upper bound is obtained using the massive pulsar (PSR) J0740+6620 and the strangely light High Energy Stereoscopic System (HESS) J1731-347 compact object.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116956"},"PeriodicalIF":2.5,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143947639","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":"Bell and Mermin inequalities in Quantum Field Theory from vacuum projectors and Weyl operators","authors":"M.S. Guimaraes ,&nbsp;I. Roditi ,&nbsp;S.P. Sorella ,&nbsp;A.F. Vieira","doi":"10.1016/j.nuclphysb.2025.116942","DOIUrl":"10.1016/j.nuclphysb.2025.116942","url":null,"abstract":"<div><div>The use of the vacuum projector <span><math><mo>|</mo><mn>0</mn><mo>〉</mo><mo>〈</mo><mn>0</mn><mo>|</mo></math></span> and of the unitary Weyl operators enables us to construct a set of Hermitian dichotomic operators in relativistic scalar Quantum Field Theory in Minkowski spacetime. Employing test functions supported in diamond regions, both Bell and Mermin inequalities are studied by means of a numerical setup. In addition to reporting expressive violations of both inequalities, the cluster property is also checked.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116942"},"PeriodicalIF":2.5,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143943430","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":"Constructing noncommutative black holes","authors":"Tajron Jurić,&nbsp;A. Naveena Kumara,&nbsp;Filip Požar","doi":"10.1016/j.nuclphysb.2025.116950","DOIUrl":"10.1016/j.nuclphysb.2025.116950","url":null,"abstract":"<div><div>We present a self-contained and consistent formulation of noncommutative (NC) gauge theory of gravity, focusing on spherically symmetric black hole geometries. Our construction starts from the gauge-theoretic viewpoint of Poincaré (or de Sitter) gravity and introduces noncommutativity through the Moyal star product and the Seiberg-Witten map, retaining NC gauge invariance at each order in the deformation parameter Θ. Working systematically to second order in Θ, we obtain explicit NC corrections to the spin connection, the vierbein, and various geometric objects such as the metric and curvature scalars. Using these results, we compute NC modifications of four-dimensional Schwarzschild and Reissner-Nordström solutions, including scenarios with a cosmological constant, as well as three-dimensional BTZ-type black holes (both uncharged and charged). For each black hole solution, we explore various possible Moyal twists, each of which generally breaks some symmetries and modifies the horizon structure, surface gravity, and curvature invariants. In particular, we show that while the radial location of horizons in Schwarzschild-like solutions remains unchanged for some twists, other twists introduce important but finite deformations in curvature scalars and can decouple the Killing horizon from the causal horizon. Similar patterns arise in the charged and lower-dimensional cases. Beyond constructing explicit examples, our approach provides a blueprint for systematically incorporating short-distance quantum corrections through noncommutativity in gravitational settings. The methods and expansions we present can be extended to more general geometries including rotating black holes and additional matter fields, offering a broad framework for future studies of NC effects in classical solutions of general relativity.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116950"},"PeriodicalIF":2.5,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143947640","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":"Plasma lensing and particle dynamics in the vicinity of a Dyonic black hole solution in the context a perfect fluid","authors":"Allah Ditta ,&nbsp;Sikander Mehmood ,&nbsp;Wajiha Tanveer ,&nbsp;Waleed Ahmad ,&nbsp;Awad A. Ibraheem ,&nbsp;Rana Muhammad Zulqarnain ,&nbsp;Farruh Atamurotov","doi":"10.1016/j.nuclphysb.2025.116949","DOIUrl":"10.1016/j.nuclphysb.2025.116949","url":null,"abstract":"<div><div>This article investigates the particle motion properties, and plasma lensing in weak gravitational field around a Dyonic black hole solution in a perfect fluid. We analyze the motion of massive and massless particles by studying the effective potential, energy, and angular momentum as a function of electric and magnetic charge, the fluid parameters, <strong>a</strong>, and the surrounding field parameter <em>ω</em>. We have examined the features using Dyonic black holes, including horizon structure, photon orbit, and ISCO radius, to better understand the effect of black hole parameters on their behavior. Our findings indicate that by increasing the electric charge <span><math><msub><mrow><mi>q</mi></mrow><mrow><mi>E</mi></mrow></msub></math></span>, magnetic charge, <span><math><msub><mrow><mi>q</mi></mrow><mrow><mi>M</mi></mrow></msub></math></span>, and surrounding field parameter <em>ω</em> brings the orbit closer to the central compact object. In contrast, the fluid parameter <strong>a</strong> has an opposing effect, shifting the ISCO outward. Wa have also determined the deflection angle of light rays surrounding the black hole in a weak plasma environment using the uniform and <em>SIS</em> plasma fields, and found that black holes parameters have clear effect on deflection angle.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116949"},"PeriodicalIF":2.5,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068642","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":"Studying the enigma of particle dynamics using a new type of regular charged black hole","authors":"Allah Ditta ,&nbsp;Ibrar Hussain ,&nbsp;Farzan Mushtaq ,&nbsp;G. Mustafa ,&nbsp;Farruh Atamurotov","doi":"10.1016/j.nuclphysb.2025.116943","DOIUrl":"10.1016/j.nuclphysb.2025.116943","url":null,"abstract":"<div><div>This study examines the regular charged black hole solution by investigating particle dynamics and various related properties, such as the radius of the horizon, the effective force, the energy, the angular momentum, the ISCO radius, the photon radius, the red-blue shift, and the weak plasma lensing in uniform plasma fields, <em>SIS</em>, and <span><math><mi>N</mi><mi>S</mi><mi>I</mi><mi>S</mi></math></span>. Furthermore, we examine the image magnification for the black hole solution. A salient characteristic of this black hole solution is the incorporation of the magnetic charge parameter <em>q</em>, which differentiates it from the Schwarzschild black hole solution. By taking <span><math><mi>q</mi><mo>=</mo><mn>0</mn></math></span>, we compare our results with the Schwarzschild black hole scenario and identify substantial variations. Our research elucidates the impact of the magnetic charge parameter <em>q</em> on multiple physical parameters of the black hole and offers a comprehensive comparison with the Schwarzschild black hole solution.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116943"},"PeriodicalIF":2.5,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068643","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":"BMS symmetries of gravitational scattering","authors":"Xavier Kervyn","doi":"10.1016/j.nuclphysb.2025.116948","DOIUrl":"10.1016/j.nuclphysb.2025.116948","url":null,"abstract":"<div><div>After motivating the relevance of the Bondi-Metzner-Sachs (BMS) group over the last decades, we review how concepts such as Penrose diagrams and the covariant phase space formalism can be used to understand the asymptotic structure of asymptotically flat spacetimes (AFS). We then explicitly construct the asymptotic symmetry group of AFS in <span><math><mn>3</mn><mo>+</mo><mn>1</mn></math></span> dimensions, the BMS group. Next, we apply this knowledge to the usual far-field scattering problem in general relativity, which leads to the unravelling of the intrinsic features of gravity in the infrared. In particular, we work out the connections between asymptotic symmetries, soft theorems in quantum field theories and gravitational memory effects. We restrict to the study of this <em>infrared triangle</em> through the lens of supertranslations here, but the analogous features that can be found in the case of superrotations or for other gauge theories are also motivated at the end of our discussion. We conclude with an overview of the implications of the infrared triangle of gravity for the formulation of an approach to quantum gravity through holography, as well as a brief discussion of its potential in tackling the black hole information paradox.</div><div>This review article arose from an essay submitted for the partial fulfilment of the requirements for the degree of <em>Master of Advanced Study in Applied Mathematics</em> (Part III of the Mathematical Tripos) at the University of Cambridge, set by Dr. Prahar Mitra and submitted by the author in May 2023. It is aimed at advanced undergraduate students or early postgraduate students willing to learn about the role of asymptotic symmetries in the context of flat space holography, with only basic knowledge of quantum field theory and general relativity assumed.</div></div><div><h3>Note</h3><div>Another comprehensive review on this topic by Laura Donnay <span><span>[1]</span></span> appeared between the submission of this essay and its publication. The present review provides complementary background material and includes explicit derivations, which may be useful to young researchers.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116948"},"PeriodicalIF":2.5,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935522","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}