Pub Date : 2026-04-01Epub Date: 2026-01-23DOI: 10.1016/j.aop.2026.170360
Bekir Can Lütfüoğlu , Erdinç Ulaş Saka , Abubakir Shermatov , Javlon Rayimbaev , Inomjon Ibragimov , Sokhibjan Muminov
We investigate gravitational quasinormal modes of the Dymnikova black hole, a regular spacetime in which the central singularity is replaced by a de Sitter core. This geometry, originally proposed as a phenomenological model, also arises naturally in the framework of Asymptotically Safe gravity, where quantum corrections lead to a scale-dependent modification of the Schwarzschild solution. Focusing on axial gravitational perturbations, we compute the dominant quasinormal frequencies using the WKB method with Padé approximants and verify the results with time-domain integration. We find that the introduction of the quantum parameter leads to systematic deviations from the Schwarzschild spectrum: the real oscillation frequency decreases as increases, while the damping rate also becomes smaller, implying longer-lived modes. In the limit of large , the quasinormal spectrum smoothly approaches the Schwarzschild case. These results suggest that even though the corrections are localized near the horizon, they leave imprints in the gravitational-wave ringdown which may become accessible to observation with future high-precision detectors.
{"title":"Gravitational quasinormal modes of Dymnikova black holes","authors":"Bekir Can Lütfüoğlu , Erdinç Ulaş Saka , Abubakir Shermatov , Javlon Rayimbaev , Inomjon Ibragimov , Sokhibjan Muminov","doi":"10.1016/j.aop.2026.170360","DOIUrl":"10.1016/j.aop.2026.170360","url":null,"abstract":"<div><div>We investigate gravitational quasinormal modes of the Dymnikova black hole, a regular spacetime in which the central singularity is replaced by a de Sitter core. This geometry, originally proposed as a phenomenological model, also arises naturally in the framework of Asymptotically Safe gravity, where quantum corrections lead to a scale-dependent modification of the Schwarzschild solution. Focusing on axial gravitational perturbations, we compute the dominant quasinormal frequencies using the WKB method with Padé approximants and verify the results with time-domain integration. We find that the introduction of the quantum parameter <span><math><msub><mrow><mi>l</mi></mrow><mrow><mi>cr</mi></mrow></msub></math></span> leads to systematic deviations from the Schwarzschild spectrum: the real oscillation frequency decreases as <span><math><msub><mrow><mi>l</mi></mrow><mrow><mi>cr</mi></mrow></msub></math></span> increases, while the damping rate also becomes smaller, implying longer-lived modes. In the limit of large <span><math><msub><mrow><mi>l</mi></mrow><mrow><mi>cr</mi></mrow></msub></math></span>, the quasinormal spectrum smoothly approaches the Schwarzschild case. These results suggest that even though the corrections are localized near the horizon, they leave imprints in the gravitational-wave ringdown which may become accessible to observation with future high-precision detectors.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"487 ","pages":"Article 170360"},"PeriodicalIF":3.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146037352","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}
Pub Date : 2026-04-01Epub Date: 2026-01-23DOI: 10.1016/j.aop.2026.170361
Maxim Dvornikov
We study neutrino oscillations in external fields using the approach based on the quantum field theory (QFT). Neutrinos are virtual particles in this formalism. Neutrino mass eigenstates are supposed to be Dirac fermions. We consider two cases of external fields: the neutrino electroweak interaction with background matter and the interaction with an external magnetic field owing to the presence of the transition magnetic moment. The formalism used involves the dressed propagators of mass eigenstates in external fields. In the matter case, finding of these propagators for Dirac neutrinos has certain difficulties compared to the Majorana particles considered previously. These difficulties are overcome by regularizing the effective potential of the neutrino interaction with matter. The QFT formalism application to the spin-flavor precession also encounters certain peculiarities in the Dirac case compared to the Majorana one. They are related to the observability of right polarized Dirac neutrinos. We derive the matrix elements and the probabilities for Dirac neutrinos interacting with both types of external fields. In case of the spin-flavor precession, we obtain the small QFT contribution to the probabilities in addition to the prediction of the quantum mechanical approach.
{"title":"Quantum field theory treatment of oscillations of Dirac neutrinos in external fields","authors":"Maxim Dvornikov","doi":"10.1016/j.aop.2026.170361","DOIUrl":"10.1016/j.aop.2026.170361","url":null,"abstract":"<div><div>We study neutrino oscillations in external fields using the approach based on the quantum field theory (QFT). Neutrinos are virtual particles in this formalism. Neutrino mass eigenstates are supposed to be Dirac fermions. We consider two cases of external fields: the neutrino electroweak interaction with background matter and the interaction with an external magnetic field owing to the presence of the transition magnetic moment. The formalism used involves the dressed propagators of mass eigenstates in external fields. In the matter case, finding of these propagators for Dirac neutrinos has certain difficulties compared to the Majorana particles considered previously. These difficulties are overcome by regularizing the effective potential of the neutrino interaction with matter. The QFT formalism application to the spin-flavor precession also encounters certain peculiarities in the Dirac case compared to the Majorana one. They are related to the observability of right polarized Dirac neutrinos. We derive the matrix elements and the probabilities for Dirac neutrinos interacting with both types of external fields. In case of the spin-flavor precession, we obtain the small QFT contribution to the probabilities in addition to the prediction of the quantum mechanical approach.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"487 ","pages":"Article 170361"},"PeriodicalIF":3.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076000","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}
With the non-metricity scalar as the functional argument, several gravity models are found to be proposed which are perfectly able to mimic the late-time accelerated expansion as pointed out by the type Ia supernovae observations. Temperature fluctuation differences for two celestial hemispheres, Hubble tension, voids, dipole modulation, anisotropic inflation, etc. motivates us to think beyond the CDM model and the cosmological principle. Bianchi-I model portrays an anisotropic universe imposing shear. model also enables us to produce early inflation to late de Sitter universe without the requirement of CDM. Ambiguities regarding fine-tuning or coincidences can be avoided alongwith. So, this article finds different stationary points of cosmic evolution with models habilitating in Bianchi-I anisotropic universe. Depending on models’ nature, fixed points with different categories are found. Perturbations are followed wherever are applicable. While pursuing cosmological implications towards these fixed points, some are found to be formed only for the consideration of gravity and Bianchi-I both. Besides different prediction towards early inflation to late-time expansion which are available in existing literature of dynamical system studies, occurrences of ultra slow roll inflation is predicted. For particular model, shear is predicted to decay leaving behind a constant valued residue. This models a universe that gradually turns more homogeneous. In some other models, depending on initial conditions, a final isotropic leftover is marked as the future fate of anisotropic world. More than one stable points are marked for special cases and are cosmologically interpreted.
{"title":"Stability analysis of four f(Q) gravity models: A cosmological review in the background of Bianchi-I anisotropy","authors":"Subhajit Pal , Atanu Mukherjee , Ritabrata Biswas , Farook Rahaman","doi":"10.1016/j.aop.2026.170351","DOIUrl":"10.1016/j.aop.2026.170351","url":null,"abstract":"<div><div>With the non-metricity scalar <span><math><mi>Q</mi></math></span> as the functional argument, several <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>)</mo></mrow></mrow></math></span> gravity models are found to be proposed which are perfectly able to mimic the late-time accelerated expansion as pointed out by the type Ia supernovae observations. Temperature fluctuation differences for two celestial hemispheres, Hubble tension, voids, dipole modulation, anisotropic inflation, etc. motivates us to think beyond the <span><math><mi>Λ</mi></math></span>CDM model and the cosmological principle. Bianchi-I model portrays an anisotropic universe imposing shear. <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>)</mo></mrow></mrow></math></span> model also enables us to produce early inflation to late de Sitter universe without the requirement of <span><math><mi>Λ</mi></math></span>CDM. Ambiguities regarding fine-tuning or coincidences can be avoided alongwith. So, this article finds different stationary points of cosmic evolution with <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>)</mo></mrow></mrow></math></span> models habilitating in Bianchi-I anisotropic universe. Depending on models’ nature, fixed points with different categories are found. Perturbations are followed wherever are applicable. While pursuing cosmological implications towards these fixed points, some are found to be formed only for the consideration of <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>)</mo></mrow></mrow></math></span> gravity and Bianchi-I both. Besides different prediction towards early inflation to late-time expansion which are available in existing literature of dynamical system studies, occurrences of ultra slow roll inflation is predicted. For particular <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>)</mo></mrow></mrow></math></span> model, shear is predicted to decay leaving behind a constant valued residue. This models a universe that gradually turns more homogeneous. In some other models, depending on initial conditions, a final isotropic leftover is marked as the future fate of anisotropic world. More than one stable points are marked for special cases and are cosmologically interpreted.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"487 ","pages":"Article 170351"},"PeriodicalIF":3.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146006639","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}
Pub Date : 2026-03-01Epub Date: 2026-01-07DOI: 10.1016/j.aop.2026.170346
Hassan Hassanabadi , Kangxian Guo , Liangliang Lu , Edilberto O. Silva
We investigate the optical and quantum mechanical properties of a charged spinless particle confined in a two-dimensional quantum ring under the simultaneous influence of a spiral dislocation and an external magnetic field. The dislocation is modeled by a torsion-induced metric that alters the spatial geometry without introducing curvature. Using the minimal coupling procedure in curved space, we derive a modified Schrödinger equation incorporating both topological and electromagnetic effects. The geometric deformation leads to an energy-dependent effective potential, enabling a tunable control over the bound-state spectrum. We analyze how the spiral dislocation modifies the absorption coefficient, refractive index variation, and photoionization cross-section. The results demonstrate that the dislocation not only shifts the resonance peaks but also enhances or suppresses specific optical transitions depending on the angular momentum. These findings open up possibilities for geometrically tuning light–matter interactions in topological quantum devices.
{"title":"Spiral dislocation as a tunable geometric parameter for optical responses in quantum rings","authors":"Hassan Hassanabadi , Kangxian Guo , Liangliang Lu , Edilberto O. Silva","doi":"10.1016/j.aop.2026.170346","DOIUrl":"10.1016/j.aop.2026.170346","url":null,"abstract":"<div><div>We investigate the optical and quantum mechanical properties of a charged spinless particle confined in a two-dimensional quantum ring under the simultaneous influence of a spiral dislocation and an external magnetic field. The dislocation is modeled by a torsion-induced metric that alters the spatial geometry without introducing curvature. Using the minimal coupling procedure in curved space, we derive a modified Schrödinger equation incorporating both topological and electromagnetic effects. The geometric deformation leads to an energy-dependent effective potential, enabling a tunable control over the bound-state spectrum. We analyze how the spiral dislocation modifies the absorption coefficient, refractive index variation, and photoionization cross-section. The results demonstrate that the dislocation not only shifts the resonance peaks but also enhances or suppresses specific optical transitions depending on the angular momentum. These findings open up possibilities for geometrically tuning light–matter interactions in topological quantum devices.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"486 ","pages":"Article 170346"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922861","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}
Pub Date : 2026-03-01Epub Date: 2026-02-03DOI: 10.1016/j.aop.2026.170343
Toma Yoneya , Kazuya Fujimoto , Yuki Kawaguchi
{"title":"Erratum to “Path-integral formulation of bosonic Markovian open quantum dynamics with Monte Carlo stochastic trajectories using the Glauber–Sudarshan P, Wigner, and Husimi Q functions and hybrids” [Annals of Physics (2026) 170325]","authors":"Toma Yoneya , Kazuya Fujimoto , Yuki Kawaguchi","doi":"10.1016/j.aop.2026.170343","DOIUrl":"10.1016/j.aop.2026.170343","url":null,"abstract":"","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"486 ","pages":"Article 170343"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147394800","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}
Pub Date : 2026-03-01Epub Date: 2026-01-10DOI: 10.1016/j.aop.2026.170344
Dongyang Yu
The Lipkin–Meshkov–Glick (LMG) model is paradigmatic for studying quantum phase transitions in equilibrium or non-equilibrium systems and entanglement dynamics in a variety of disciplines. A generic LMG model typically incorporates dual nonlinear interactions. While the classical dynamics of the single-nonlinear-interaction LMG model is well understood through Jacobi elliptic functions, the dual-interaction case remains unexplored owing to analytical challenges. By constructing an auxiliary function that maps the dynamics to the complex plane of Jacobi elliptic functions, we derive the exact solutions of the classical dynamics for the dual-interaction LMG model. Based on the exact solutions, we provide the classical dynamical phase diagram of the LMG model with dual nonlinear interactions, and find out the non-logarithmic behavior of dynamical criticality that is absent in the case of single nonlinear interaction. Our results establish a benchmark for analyzing the quantum dynamical phase transitions and many-body entanglement dynamics of finite-size LMG models with dual nonlinear interactions.
{"title":"Exact solutions and dynamical phase transitions in the Lipkin–Meshkov–Glick model with dual nonlinear interactions","authors":"Dongyang Yu","doi":"10.1016/j.aop.2026.170344","DOIUrl":"10.1016/j.aop.2026.170344","url":null,"abstract":"<div><div>The Lipkin–Meshkov–Glick (LMG) model is paradigmatic for studying quantum phase transitions in equilibrium or non-equilibrium systems and entanglement dynamics in a variety of disciplines. A generic LMG model typically incorporates dual nonlinear interactions. While the classical dynamics of the single-nonlinear-interaction LMG model is well understood through Jacobi elliptic functions, the dual-interaction case remains unexplored owing to analytical challenges. By constructing an auxiliary function that maps the dynamics to the complex plane of Jacobi elliptic functions, we derive the exact solutions of the classical dynamics for the dual-interaction LMG model. Based on the exact solutions, we provide the classical dynamical phase diagram of the LMG model with dual nonlinear interactions, and find out the non-logarithmic behavior of dynamical criticality that is absent in the case of single nonlinear interaction. Our results establish a benchmark for analyzing the quantum dynamical phase transitions and many-body entanglement dynamics of finite-size LMG models with dual nonlinear interactions.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"486 ","pages":"Article 170344"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973989","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}
Pub Date : 2026-03-01Epub Date: 2025-12-31DOI: 10.1016/j.aop.2025.170329
Ipsita Mandal
Spin- and valley-polarized fractionally-filled moiré flatbands are known to host emergent Fermi-liquid phases, when analysed with the help of a dual description in terms of holes. The dominant Coulomb interactions in an almost flatband endow the fermions with a nontrivial dispersion, when the system is described in terms of the hole operators (rather than the particle operators). In particular, for one-fourth filling, the Fermi surface takes a quasi-triangular shape, which brings about the possibility of charge-density-wave (CDW) ordering in the ground state, characterised by the nesting vectors (). The ’s connect antipodal points of the Fermi surface (designated as hot-spots) and are found to belong to the space of reciprocal vectors of the underlying honeycomb structure. The resulting CDW order can be described in terms of instabilities caused by bosonic fields with momenta centred at , coupling with the fermions residing in the vicinity of a pair of antipodal hot-spots. When there is a transition from a Fermi liquid to a CDW state, the bosons become massless (or critical), effectuating a non-Fermi liquid behaviour. We set out to identify such non-Fermi liquid phases after constructing a minimal effective action.
{"title":"Non-Fermi liquid behaviour of CDW instabilities in fractionally-filled moiré flatbands","authors":"Ipsita Mandal","doi":"10.1016/j.aop.2025.170329","DOIUrl":"10.1016/j.aop.2025.170329","url":null,"abstract":"<div><div>Spin- and valley-polarized fractionally-filled moiré flatbands are known to host emergent Fermi-liquid phases, when analysed with the help of a dual description in terms of holes. The dominant Coulomb interactions in an almost flatband endow the fermions with a nontrivial dispersion, when the system is described in terms of the hole operators (rather than the particle operators). In particular, for one-fourth filling, the Fermi surface takes a quasi-triangular shape, which brings about the possibility of charge-density-wave (CDW) ordering in the ground state, characterised by the nesting vectors (<span><math><msub><mrow><mi>Q</mi></mrow><mrow><mi>n</mi></mrow></msub></math></span>). The <span><math><msub><mrow><mi>Q</mi></mrow><mrow><mi>n</mi></mrow></msub></math></span>’s connect antipodal points of the Fermi surface (designated as hot-spots) and are found to belong to the space of reciprocal vectors of the underlying honeycomb structure. The resulting CDW order can be described in terms of instabilities caused by bosonic fields with momenta centred at <span><math><mrow><mo>{</mo><msub><mrow><mi>Q</mi></mrow><mrow><mi>n</mi></mrow></msub><mo>}</mo></mrow></math></span>, coupling with the fermions residing in the vicinity of a pair of antipodal hot-spots. When there is a transition from a Fermi liquid to a CDW state, the bosons become massless (or critical), effectuating a non-Fermi liquid behaviour. We set out to identify such non-Fermi liquid phases after constructing a minimal effective action.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"486 ","pages":"Article 170329"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145883169","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}
In this study, we explore the cosmological implications of a modified gravity theory characterized by the function , where is the Ricci scalar, represents a geometric deformation term, and denotes the trace of the energy–momentum tensor. The model is reconstructed under the framework of three fundamental energy conditions: Null Energy Condition (NEC), Dominant Energy Condition (DEC), and Strong Energy Condition (SEC). We derive the corresponding Hubble parameter for each case and constrain the free parameters , , and using the latest Cosmic Chronometer (CC) and Pantheon+ Type Ia Supernova datasets. A thorough analysis of physical quantities such as pressure, energy density, and the equation of state parameter is carried out. Furthermore, diagnostic tools including the deceleration parameter , statefinder parameters , and the diagnostic are employed to assess the models viability. Our findings suggest that the model can consistently describe late-time cosmic acceleration and offers distinct behavior under different energy conditions, all while aligning with current observational data.
在这项研究中，我们探索了一个修正的引力理论的宇宙学含义，该理论的特征是函数f(R，Σ，T)，其中R是里奇标量，Σ表示几何变形项，T表示能量动量张量的轨迹。在零能条件（NEC）、优势能条件（DEC）和强能条件（SEC）三种基本能量条件的框架下重构了该模型。利用最新的Cosmic Chronometer （CC）和Pantheon+ Type Ia超新星数据集，我们推导出了每种情况下对应的哈勃参数H(z)，并约束了自由参数H0， α和β。对压力、能量密度和状态方程参数等物理量进行了深入的分析。此外，诊断工具包括减速参数q(z)、状态查找器参数{r，s}和Om(z)诊断来评估模型的可行性。我们的发现表明，该模型可以一致地描述晚期宇宙加速，并在不同能量条件下提供不同的行为，同时与当前的观测数据保持一致。
{"title":"Dark energy behavior from static equation of state in non-minimally coupled gravity with scalar deformation","authors":"N. Myrzakulov , S.H. Shekh , S.R. Bhoyar , Anirudh Pradhan","doi":"10.1016/j.aop.2025.170333","DOIUrl":"10.1016/j.aop.2025.170333","url":null,"abstract":"<div><div>In this study, we explore the cosmological implications of a modified gravity theory characterized by the function <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>R</mi><mo>,</mo><mi>Σ</mi><mo>,</mo><mi>T</mi><mo>)</mo></mrow></mrow></math></span>, where <span><math><mi>R</mi></math></span> is the Ricci scalar, <span><math><mi>Σ</mi></math></span> represents a geometric deformation term, and <span><math><mi>T</mi></math></span> denotes the trace of the energy–momentum tensor. The model is reconstructed under the framework of three fundamental energy conditions: Null Energy Condition (NEC), Dominant Energy Condition (DEC), and Strong Energy Condition (SEC). We derive the corresponding Hubble parameter <span><math><mrow><mi>H</mi><mrow><mo>(</mo><mi>z</mi><mo>)</mo></mrow></mrow></math></span> for each case and constrain the free parameters <span><math><msub><mrow><mi>H</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span>, <span><math><mi>α</mi></math></span>, and <span><math><mi>β</mi></math></span> using the latest Cosmic Chronometer (CC) and Pantheon+ Type Ia Supernova datasets. A thorough analysis of physical quantities such as pressure, energy density, and the equation of state parameter is carried out. Furthermore, diagnostic tools including the deceleration parameter <span><math><mrow><mi>q</mi><mrow><mo>(</mo><mi>z</mi><mo>)</mo></mrow></mrow></math></span>, statefinder parameters <span><math><mrow><mo>{</mo><mi>r</mi><mo>,</mo><mi>s</mi><mo>}</mo></mrow></math></span>, and the <span><math><mrow><msub><mrow><mi>O</mi></mrow><mrow><mi>m</mi></mrow></msub><mrow><mo>(</mo><mi>z</mi><mo>)</mo></mrow></mrow></math></span> diagnostic are employed to assess the models viability. Our findings suggest that the model can consistently describe late-time cosmic acceleration and offers distinct behavior under different energy conditions, all while aligning with current observational data.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"486 ","pages":"Article 170333"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922857","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}
Pub Date : 2026-03-01Epub Date: 2025-12-19DOI: 10.1016/j.aop.2025.170330
Mohammad Umar, Paramasivam Senthilkumaran
This paper investigates the rotational dynamics on the higher-order Poincaré sphere with the use of -plate by exploring three key aspects: the topological condition, the global-local rotation, and the SU(2) polarization evolution on the sphere. The polarized light beam corresponding to this sphere and -plates shares analogous topological features, characterized by azimuthal variation. We have formulated the topological condition that establishes a connection between the -plate and the higher-order Poincaré sphere, enabling the SU(2) polarization evolution on the same higher-order Poincaré sphere. Leveraging this correspondence, we have shown that a single global SO(3) rotation on the higher-order Poincaré sphere is a collection of multiple local SO(3) rotations on the standard Poincaré sphere. SO(3) is related to SU(2) through a two-to-one surjective homomorphism, with SU(2) serving as its double cover. Moreover, we demonstrate that a general -plate, defined by a continuously tunable retardance ranging from 0 to and an offset angle ranging from 0 to , provides the complete coverage on the higher-order Poincaré sphere. More importantly, by polarization evolution we mean that both the initial and final states belong to the same sphere, unlike the many existing methods that convert a homogeneous polarization state into a higher-order Poincaré sphere beams.
{"title":"SU(2) polarization evolution on higher-order Poincaré sphere by using general q-plate","authors":"Mohammad Umar, Paramasivam Senthilkumaran","doi":"10.1016/j.aop.2025.170330","DOIUrl":"10.1016/j.aop.2025.170330","url":null,"abstract":"<div><div>This paper investigates the rotational dynamics on the higher-order Poincaré sphere with the use of <span><math><mi>q</mi></math></span>-plate by exploring three key aspects: the topological condition, the global-local rotation, and the SU(2) polarization evolution on the sphere. The polarized light beam corresponding to this sphere and <span><math><mi>q</mi></math></span>-plates shares analogous topological features, characterized by azimuthal variation. We have formulated the topological condition that establishes a connection between the <span><math><mi>q</mi></math></span>-plate and the higher-order Poincaré sphere, enabling the SU(2) polarization evolution on the same higher-order Poincaré sphere. Leveraging this correspondence, we have shown that a single <em>global</em> SO(3) rotation on the higher-order Poincaré sphere is a collection of multiple <em>local</em> SO(3) rotations on the standard Poincaré sphere. SO(3) is related to SU(2) through a two-to-one surjective homomorphism, with SU(2) serving as its double cover. Moreover, we demonstrate that a general <span><math><mi>q</mi></math></span>-plate, defined by a continuously tunable retardance ranging from 0 to <span><math><mrow><mn>2</mn><mi>π</mi></mrow></math></span> and an offset angle ranging from 0 to <span><math><mrow><mi>π</mi><mo>/</mo><mn>2</mn></mrow></math></span>, provides the complete coverage on the higher-order Poincaré sphere. More importantly, by polarization evolution we mean that both the initial and final states belong to the same sphere, unlike the many existing methods that convert a homogeneous polarization state into a higher-order Poincaré sphere beams.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"486 ","pages":"Article 170330"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145847627","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}
Pub Date : 2026-03-01Epub Date: 2026-01-03DOI: 10.1016/j.aop.2025.170334
M. Ilyas , Khalid Masood , N.A. Shah
We investigate static, spherically symmetric wormhole solutions in modified Gauss–Bonnet () gravity incorporating non-commutative geometry. To construct these solutions, we employ two distinct methods: first, by assuming a specific model and deriving the corresponding shape function ; and second, by specifying and deriving the required model. Remarkably, the first approach yields a solution threaded by normal matter that satisfies the energy conditions across the entire radial range. The second approach also yields a physically valid solution, but only for large values of . Our analysis of the energy conditions provides valuable insights into the interplay between geometry, gravity, and matter in this framework.
{"title":"Non-commutative wormhole solutions in Higher Order Gauss Bonnet Gravity","authors":"M. Ilyas , Khalid Masood , N.A. Shah","doi":"10.1016/j.aop.2025.170334","DOIUrl":"10.1016/j.aop.2025.170334","url":null,"abstract":"<div><div>We investigate static, spherically symmetric wormhole solutions in modified Gauss–Bonnet (<span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>G</mi><mo>)</mo></mrow></mrow></math></span>) gravity incorporating non-commutative geometry. To construct these solutions, we employ two distinct methods: first, by assuming a specific <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>G</mi><mo>)</mo></mrow></mrow></math></span> model and deriving the corresponding shape function <span><math><mrow><mi>b</mi><mrow><mo>(</mo><mi>r</mi><mo>)</mo></mrow></mrow></math></span>; and second, by specifying <span><math><mrow><mi>b</mi><mrow><mo>(</mo><mi>r</mi><mo>)</mo></mrow></mrow></math></span> and deriving the required <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>G</mi><mo>)</mo></mrow></mrow></math></span> model. Remarkably, the first approach yields a solution threaded by normal matter that satisfies the energy conditions across the entire radial range. The second approach also yields a physically valid solution, but only for large values of <span><math><mi>r</mi></math></span>. Our analysis of the energy conditions provides valuable insights into the interplay between geometry, gravity, and matter in this framework.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"486 ","pages":"Article 170334"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973993","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}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号