This study investigates the effects of Hawking radiation on tripartite quantum coherence and tripartite entropy uncertainty measurement in the context of a Schwarzschild black hole. Two main cases are examined, each encompassing three distinct scenarios: one involving only accessible modes (particles outside the event horizon), another involving only inaccessible modes (antiparticles inside the event horizon), and a third involving both accessible and inaccessible modes. Results show that in scenarios with accessible modes, tripartite quantum coherence decreases monotonically with increasing Hawking temperature, while tripartite entropy uncertainty measurement rises. Conversely, when inaccessible modes are present, Hawking radiation generates quantum coherence and reduces entropy uncertainty measurement. This suggests that quantum coherence and measurement uncertainty can be transmitted or distributed across different regions of spacetime, even across the event horizon of a black hole, indicating an interconnection of quantum properties despite the horizon’s role as a boundary.
{"title":"The effect of Hawking radiation on tripartite entropic uncertainty and tripartite Quantum coherence in Schwarzschild spacetime","authors":"Wajid Joyia , Asif Ilyas , Mahtab A. Khan , Nahaa Eid Alsubaie , Amaria Javed","doi":"10.1016/j.aop.2025.170269","DOIUrl":"10.1016/j.aop.2025.170269","url":null,"abstract":"<div><div>This study investigates the effects of Hawking radiation on tripartite quantum coherence and tripartite entropy uncertainty measurement in the context of a Schwarzschild black hole. Two main cases are examined, each encompassing three distinct scenarios: one involving only accessible modes (particles outside the event horizon), another involving only inaccessible modes (antiparticles inside the event horizon), and a third involving both accessible and inaccessible modes. Results show that in scenarios with accessible modes, tripartite quantum coherence decreases monotonically with increasing Hawking temperature, while tripartite entropy uncertainty measurement rises. Conversely, when inaccessible modes are present, Hawking radiation generates quantum coherence and reduces entropy uncertainty measurement. This suggests that quantum coherence and measurement uncertainty can be transmitted or distributed across different regions of spacetime, even across the event horizon of a black hole, indicating an interconnection of quantum properties despite the horizon’s role as a boundary.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"483 ","pages":"Article 170269"},"PeriodicalIF":3.0,"publicationDate":"2025-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145463424","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}
We investigate the phase sensitivity of a Mach–Zehnder interferometer using a special class of generalized coherent states constructed from generalized Heisenberg and deformed algebras. These states, derived from a perturbed harmonic oscillator with a four-parameter deformed spectrum, provide enhanced tunability and nonclassical features. The quantum Fisher information and its associated quantum Cramér–Rao bound are computed to define the fundamental precision limits in phase estimation. We analyze the phase sensitivity under three realistic detection methods: difference intensity detection, single-mode intensity detection, and balanced homodyne detection. The performance of each method is compared with the quantum Cramér–Rao bound to evaluate their optimality. Our results demonstrate that, for suitable parameter regimes, these generalized coherent states enable phase sensitivities approaching the quantum limit. This offers a flexible framework for precision quantum metrology and potential applications in quantum-enhanced sensing.
{"title":"Quantum phase sensitivity with generalized coherent states based on deformed su(1,1) and Heisenberg algebras","authors":"Nour-Eddine Abouelkhir , Abdallah Slaoui , Rachid Ahl Laamara","doi":"10.1016/j.aop.2025.170276","DOIUrl":"10.1016/j.aop.2025.170276","url":null,"abstract":"<div><div>We investigate the phase sensitivity of a Mach–Zehnder interferometer using a special class of generalized coherent states constructed from generalized Heisenberg and deformed <span><math><mrow><mi>s</mi><mi>u</mi><mrow><mo>(</mo><mn>1</mn><mo>,</mo><mn>1</mn><mo>)</mo></mrow></mrow></math></span> algebras. These states, derived from a perturbed harmonic oscillator with a four-parameter deformed spectrum, provide enhanced tunability and nonclassical features. The quantum Fisher information and its associated quantum Cramér–Rao bound are computed to define the fundamental precision limits in phase estimation. We analyze the phase sensitivity under three realistic detection methods: difference intensity detection, single-mode intensity detection, and balanced homodyne detection. The performance of each method is compared with the quantum Cramér–Rao bound to evaluate their optimality. Our results demonstrate that, for suitable parameter regimes, these generalized coherent states enable phase sensitivities approaching the quantum limit. This offers a flexible framework for precision quantum metrology and potential applications in quantum-enhanced sensing.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"483 ","pages":"Article 170276"},"PeriodicalIF":3.0,"publicationDate":"2025-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145413810","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 : 2025-10-30DOI: 10.1016/j.aop.2025.170267
Matteo Baggioli , Maxim N. Chernodub , Karl Landsteiner , Alessandro Principi , María A.H. Vozmediano
The dynamics of Dirac semimetals is modeled at low energies by the massless Dirac Hamiltonian with the Fermi velocity replacing the velocity of light. The classical action is scale invariant. In 3D materials, Coulomb interactions induce a conformal anomaly associated to the charge renormalization already known in quantum field theory. In this work, we describe a new conformal anomaly induced by the running of the Fermi velocity that applies to Dirac semimetals in two and three dimensions. The case of graphene is particularly interesting. We analyze the anomaly and explore its thermodynamic and hydrodynamic consequences. The anomaly changes the thermodynamic equation of state of the systems and modifies the propagation speed of hydrodynamic sound waves experimentally accessible.
{"title":"A conformal anomaly from the Fermi velocity renormalization in graphene and Dirac semi-metals","authors":"Matteo Baggioli , Maxim N. Chernodub , Karl Landsteiner , Alessandro Principi , María A.H. Vozmediano","doi":"10.1016/j.aop.2025.170267","DOIUrl":"10.1016/j.aop.2025.170267","url":null,"abstract":"<div><div>The dynamics of Dirac semimetals is modeled at low energies by the massless Dirac Hamiltonian with the Fermi velocity replacing the velocity of light. The classical action is scale invariant. In 3D materials, Coulomb interactions induce a conformal anomaly associated to the charge renormalization already known in quantum field theory. In this work, we describe a new conformal anomaly induced by the running of the Fermi velocity that applies to Dirac semimetals in two and three dimensions. The case of graphene is particularly interesting. We analyze the anomaly and explore its thermodynamic and hydrodynamic consequences. The anomaly changes the thermodynamic equation of state of the systems and modifies the propagation speed of hydrodynamic sound waves experimentally accessible.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"483 ","pages":"Article 170267"},"PeriodicalIF":3.0,"publicationDate":"2025-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145413811","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 : 2025-10-29DOI: 10.1016/j.aop.2025.170270
Chia-Yi Ju , Junting He , Guang-Yin Chen
Exceptional points (EPs) in non-Hermitian systems exhibit intriguing properties, particularly in their eigenvalue perturbative expansions. Unlike standard perturbation theory, where perturbed eigenvalues can be expanded in a power series of the perturbation parameter, at an th-order EP, the perturbed eigenvalues are generally expanded in th-root of the perturbation parameter, indicating the nonanalytical nature of EPs. Since studies have suggested that the exponent of the perturbation parameter in the first-order term of the eigenvalue perturbation is related to the topological properties of the Hilbert space bundle, understanding this exponent is important. Therefore, in this study, we first demonstrate that the leading order in the perturbation correction is related to the topology of the Hilbert space bundle. We then show that the perturbative behavior, and hence the topology, not only depends on the order of the EP but can also be affected by the rest of the system. We show that the exponent of the expansion parameters in the leading order of eigenvalue expansions at an th-order EP can be a fractional number differs from under special circumstances. These results may contribute to identifying the topology of the Hilbert space bundle, offer a new perspective to the formulation of perturbation theory around EPs, and provide further insights into non-Hermitian quantum systems.
{"title":"Fractional exponents and topological signatures of exceptional points in non-Hermitian systems","authors":"Chia-Yi Ju , Junting He , Guang-Yin Chen","doi":"10.1016/j.aop.2025.170270","DOIUrl":"10.1016/j.aop.2025.170270","url":null,"abstract":"<div><div>Exceptional points (EPs) in non-Hermitian systems exhibit intriguing properties, particularly in their eigenvalue perturbative expansions. Unlike standard perturbation theory, where perturbed eigenvalues can be expanded in a power series of the perturbation parameter, at an <span><math><mi>N</mi></math></span>th-order EP, the perturbed eigenvalues are generally expanded in <span><math><mi>N</mi></math></span>th-root of the perturbation parameter, indicating the nonanalytical nature of EPs. Since studies have suggested that the exponent of the perturbation parameter in the first-order term of the eigenvalue perturbation is related to the topological properties of the Hilbert space bundle, understanding this exponent is important. Therefore, in this study, we first demonstrate that the leading order in the perturbation correction is related to the topology of the Hilbert space bundle. We then show that the perturbative behavior, and hence the topology, not only depends on the order of the EP but can also be affected by the rest of the system. We show that the exponent of the expansion parameters in the leading order of eigenvalue expansions at an <span><math><mi>N</mi></math></span>th-order EP can be a fractional number differs from <span><math><mrow><mn>1</mn><mo>/</mo><mi>N</mi></mrow></math></span> under special circumstances. These results may contribute to identifying the topology of the Hilbert space bundle, offer a new perspective to the formulation of perturbation theory around EPs, and provide further insights into non-Hermitian quantum systems.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"483 ","pages":"Article 170270"},"PeriodicalIF":3.0,"publicationDate":"2025-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145413809","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 theory of gravity, gravitational effect arises from non-metricity which controls how measurements of time and distance evolve over space–time. If a clock or a ruler is moved around in a space–time with nonzero , it would change the size or the ticking rate even if curvature and torsion are zero. This change comes purely from how the metric varies, not from bending (curvature) or twisting (torsion). Four models of theory of gravity are chosen
: , , and .
Equation of continuity and Friedmann equations are modified for these theories. Phase portraits are drawn with proper marking towards the fixed points. Physical interpretation of every such critical points along with center manifold analysis is pursued. Cosmological perspectives to obtain such critical points are presented for each model.
{"title":"Critical points and their cosmological interpretations for some f(Q) gravity theory models","authors":"Subhajit Pal , Atanu Mukherjee , Ritabrata Biswas , Farook Rahaman","doi":"10.1016/j.aop.2025.170272","DOIUrl":"10.1016/j.aop.2025.170272","url":null,"abstract":"<div><div>In <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>)</mo></mrow></mrow></math></span> theory of gravity, gravitational effect arises from non-metricity which controls how measurements of time and distance evolve over space–time. If a clock or a ruler is moved around in a space–time with nonzero <span><math><mi>Q</mi></math></span>, it would change the size or the ticking rate even if curvature and torsion are zero. This change comes purely from how the metric varies, not from bending (curvature) or twisting (torsion). Four models of <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>)</mo></mrow></mrow></math></span> theory of gravity are chosen</div><div>: <span><math><mrow><msup><mrow><mi>f</mi></mrow><mrow><mrow><mo>(</mo><mn>1</mn><mo>)</mo></mrow></mrow></msup><mrow><mo>(</mo><mi>Q</mi><mo>)</mo></mrow><mo>=</mo><mi>Q</mi><mo>+</mo><mi>m</mi><msup><mrow><mi>Q</mi></mrow><mrow><mi>n</mi></mrow></msup></mrow></math></span>, <span><math><mrow><msup><mrow><mi>f</mi></mrow><mrow><mrow><mo>(</mo><mn>2</mn><mo>)</mo></mrow></mrow></msup><mrow><mo>(</mo><mi>Q</mi><mo>)</mo></mrow><mo>=</mo><mi>Q</mi><msup><mrow><mi>e</mi></mrow><mrow><mfrac><mrow><mi>λ</mi></mrow><mrow><mi>Q</mi></mrow></mfrac></mrow></msup></mrow></math></span>, <span><math><mrow><msup><mrow><mi>f</mi></mrow><mrow><mrow><mo>(</mo><mn>3</mn><mo>)</mo></mrow></mrow></msup><mrow><mo>(</mo><mi>Q</mi><mo>)</mo></mrow><mo>=</mo><mi>Q</mi><mo>+</mo><mi>α</mi><msup><mrow><mi>Q</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>+</mo><mi>v</mi><msup><mrow><mi>Q</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>log</mo><mi>Q</mi></mrow></math></span> and <span><math><mrow><msup><mrow><mi>f</mi></mrow><mrow><mrow><mo>(</mo><mn>4</mn><mo>)</mo></mrow></mrow></msup><mrow><mo>(</mo><mi>Q</mi><mo>)</mo></mrow><mo>=</mo><mi>Q</mi><mo>+</mo><mi>n</mi><msub><mrow><mi>Q</mi></mrow><mrow><mn>0</mn></mrow></msub><mfenced><mrow><msqrt><mrow><mfrac><mrow><mi>Q</mi></mrow><mrow><mi>λ</mi></mrow></mfrac></mrow></msqrt></mrow></mfenced><mo>log</mo><mfenced><mrow><mfrac><mrow><mi>λ</mi><msub><mrow><mi>Q</mi></mrow><mrow><mn>0</mn></mrow></msub></mrow><mrow><mi>Q</mi></mrow></mfrac></mrow></mfenced></mrow></math></span>.</div><div>Equation of continuity and Friedmann equations are modified for these theories. Phase portraits are drawn with proper marking towards the fixed points. Physical interpretation of every such critical points along with center manifold analysis is pursued. Cosmological perspectives to obtain such critical points are presented for each model.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"483 ","pages":"Article 170272"},"PeriodicalIF":3.0,"publicationDate":"2025-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145413808","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 : 2025-10-24DOI: 10.1016/j.aop.2025.170273
Igor de M. Froldi, Hermann Freire
We systematically study the efficiency of the intrinsic superconducting diode effect of several pair-density-wave states that can emerge in two-dimensional -wave metallic altermagnets. To this end, we investigate several scenarios using an effective minimal microscopic model and Ginzburg–Landau analysis in order to derive the corresponding pairing phase diagrams. In addition, we examine also whether the presence of a Rashba spin–orbit coupling and an applied external magnetic field are beneficial to this effect in these systems. As a consequence, our results add further support to the fact that altermagnetic materials indeed provide a good platform for the pursuit of finite-momentum superconductivity, which can lead to an optimization of the diode efficiency in some physically interesting situations. The latter phenomenon has been recently proposed to be key in improving the applicability of new energy-efficient quantum electronic devices.
{"title":"Efficiency of the superconducting diode effect of pair-density-wave states in two-dimensional d-wave altermagnets","authors":"Igor de M. Froldi, Hermann Freire","doi":"10.1016/j.aop.2025.170273","DOIUrl":"10.1016/j.aop.2025.170273","url":null,"abstract":"<div><div>We systematically study the efficiency of the intrinsic superconducting diode effect of several pair-density-wave states that can emerge in two-dimensional <span><math><mi>d</mi></math></span>-wave metallic altermagnets. To this end, we investigate several scenarios using an effective minimal microscopic model and Ginzburg–Landau analysis in order to derive the corresponding pairing phase diagrams. In addition, we examine also whether the presence of a Rashba spin–orbit coupling and an applied external magnetic field are beneficial to this effect in these systems. As a consequence, our results add further support to the fact that altermagnetic materials indeed provide a good platform for the pursuit of finite-momentum superconductivity, which can lead to an optimization of the diode efficiency in some physically interesting situations. The latter phenomenon has been recently proposed to be key in improving the applicability of new energy-efficient quantum electronic devices.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"483 ","pages":"Article 170273"},"PeriodicalIF":3.0,"publicationDate":"2025-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145360162","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 paper, we construct an isotropic cosmological model in the theory of gravity in the frame of a flat FLRW spacetime, with the non-metricity tensor and the trace of the energy–momentum tensor. The gravity function is taken to be a quadratic equation, , where and are the arbitrary constants. We constrain the model parameters arising while solving the deceleration parameter as an integration constant together with the present value of the Hubble parameter using the Hubble datasets (OHD), the of 1048 data points, and the joint datasets (OHD + ). The universe model transitions from an early deceleration state to an acceleration in late times. This model also provides the ekpyrotic phase of the universe on the redshift . In this model, the Big Bang is described as a collision of branes, and thus, the Big Bang is not the beginning of time. Before the Big Bang, there is an ekpyrotic phase with the equation of state . In late times, the undeviating Hubble measurements reduce the tension in the reconstructed function. Additionally, we study various physical parameters of the model. Finally, our model describes a quintessence dark energy model at later times.
{"title":"Cosmic reverberations on a constrained f(Q,T)-model of the Universe","authors":"Akanksha Singh , Shaily , J.K. Singh , Ertan Güdekli","doi":"10.1016/j.aop.2025.170274","DOIUrl":"10.1016/j.aop.2025.170274","url":null,"abstract":"<div><div>In this paper, we construct an isotropic cosmological model in the <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>,</mo><mi>T</mi><mo>)</mo></mrow></mrow></math></span> theory of gravity in the frame of a flat FLRW spacetime, with <span><math><mi>Q</mi></math></span> the non-metricity tensor and <span><math><mi>T</mi></math></span> the trace of the energy–momentum tensor. The gravity function is taken to be a quadratic equation, <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>,</mo><mi>T</mi><mo>)</mo></mrow><mo>=</mo><mi>ζ</mi><msup><mrow><mi>Q</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>+</mo><mi>γ</mi><mi>T</mi></mrow></math></span>, where <span><math><mrow><mi>ζ</mi><mo><</mo><mn>0</mn></mrow></math></span> and <span><math><mi>γ</mi></math></span> are the arbitrary constants. We constrain the model parameters <span><math><mi>α</mi></math></span> arising while solving the deceleration parameter <span><math><mi>q</mi></math></span> as an integration constant together with the present value of the Hubble parameter <span><math><msub><mrow><mi>H</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span> using the Hubble datasets (OHD), the <span><math><mrow><mi>P</mi><mi>a</mi><mi>n</mi><mi>t</mi><mi>h</mi><mi>e</mi><mi>o</mi><mi>n</mi></mrow></math></span> of 1048 data points, and the joint datasets (OHD + <span><math><mrow><mi>P</mi><mi>a</mi><mi>n</mi><mi>t</mi><mi>h</mi><mi>e</mi><mi>o</mi><mi>n</mi></mrow></math></span>). The universe model transitions from an early deceleration state to an acceleration in late times. This model also provides the ekpyrotic phase of the universe on the redshift <span><math><mrow><mi>z</mi><mo>></mo><mn>12</mn><mo>.</mo><mn>32</mn></mrow></math></span>. In this model, the Big Bang is described as a collision of branes, and thus, the Big Bang is not the beginning of time. Before the Big Bang, there is an ekpyrotic phase with the equation of state <span><math><mrow><mi>ω</mi><mo>></mo><mo>></mo><mn>1</mn></mrow></math></span>. In late times, the undeviating Hubble measurements reduce the <span><math><msub><mrow><mi>H</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span> tension in the reconstructed <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>,</mo><mi>T</mi><mo>)</mo></mrow></mrow></math></span> function. Additionally, we study various physical parameters of the model. Finally, our model describes a quintessence dark energy model at later times.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"483 ","pages":"Article 170274"},"PeriodicalIF":3.0,"publicationDate":"2025-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145413807","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 : 2025-10-23DOI: 10.1016/j.aop.2025.170264
A.E. Bernardini , W. de Paula , R. da Rocha
Heavy-light-flavor meson resonances with charm, in the and families, and charmonium-like states, in the and families, are explored and discussed in the AdS/QCD model with four quark flavors. The differential configurational entropy is computed and analyzed for these four charmed meson families, also combining 4-flavor AdS/QCD to experimental data for the , , , and meson families. It makes it possible to predict the mass spectrum of unexplored heavier charmed meson resonances and to identify further charmed meson states reported in PDG.
{"title":"Spectroscopy of charmonium-like mesons, heavy-light mesons with charm, AdS/QCD, and configurational entropy","authors":"A.E. Bernardini , W. de Paula , R. da Rocha","doi":"10.1016/j.aop.2025.170264","DOIUrl":"10.1016/j.aop.2025.170264","url":null,"abstract":"<div><div>Heavy-light-flavor meson resonances with charm, in the <span><math><msup><mrow><mi>D</mi></mrow><mrow><mn>0</mn></mrow></msup></math></span> and <span><math><msup><mrow><mi>D</mi></mrow><mrow><mo>∗</mo></mrow></msup></math></span> families, and charmonium-like states, in the <span><math><msub><mrow><mi>η</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span> and <span><math><msub><mrow><mi>χ</mi></mrow><mrow><mi>c</mi><mn>1</mn></mrow></msub></math></span> families, are explored and discussed in the AdS/QCD model with four quark flavors. The differential configurational entropy is computed and analyzed for these four charmed meson families, also combining 4-flavor AdS/QCD to experimental data for the <span><math><msup><mrow><mi>D</mi></mrow><mrow><mn>0</mn></mrow></msup></math></span>, <span><math><msup><mrow><mi>D</mi></mrow><mrow><mo>∗</mo></mrow></msup></math></span>, <span><math><msub><mrow><mi>η</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span>, and <span><math><msub><mrow><mi>χ</mi></mrow><mrow><mi>c</mi><mn>1</mn></mrow></msub></math></span> meson families. It makes it possible to predict the mass spectrum of unexplored heavier charmed meson resonances and to identify further charmed meson states reported in PDG.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"483 ","pages":"Article 170264"},"PeriodicalIF":3.0,"publicationDate":"2025-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145413872","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 the framework of gravity, where gravity emerges from non-metricity , we explore the cosmological implications of its non-minimal coupling to matter. Inspired by the recent success of Chaplygin gas models in explaining dark energy, we consider a background fluid composed of baryonic matter, radiation, and a family of Chaplygin gas variants namely Generalized Chaplygin Gas (GCG), Modified Chaplygin Gas (MCG), and Variable Chaplygin Gas (VCG). We constrain these models with three recent observational datasets: Observational Hubble Data (OHD), Baryonic Acoustic Oscillation (BAO) measurements, and Quasi-Stellar Objects (QSO) data. For the QSO dataset, we propose an analytical expression for errors in comoving distance to circumvent the reliance on Monte Carlo simulations. Using kinematic diagnostics such as the deceleration and jerk parameters and Om diagnostic, we assess deviations of the proposed models from CDM. Our joint analysis of the three datasets reveals that the transition redshift from a decelerated to an accelerated expansion of the universe for the GCG, MCG and VCG models is , and respectively, indicating a departure from CDM.
{"title":"Observational constraints on Chaplygin gas models in non-minimally coupled power law f(Q) gravity with quasars","authors":"Nakul Aggarwal , Ali Pourmand , Fatimah Shojai , Harish Parthasarathy","doi":"10.1016/j.aop.2025.170266","DOIUrl":"10.1016/j.aop.2025.170266","url":null,"abstract":"<div><div>In the framework of <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>)</mo></mrow></mrow></math></span> gravity, where gravity emerges from non-metricity <span><math><mi>Q</mi></math></span>, we explore the cosmological implications of its non-minimal coupling to matter. Inspired by the recent success of Chaplygin gas models in explaining dark energy, we consider a background fluid composed of baryonic matter, radiation, and a family of Chaplygin gas variants namely Generalized Chaplygin Gas (GCG), Modified Chaplygin Gas (MCG), and Variable Chaplygin Gas (VCG). We constrain these models with three recent observational datasets: Observational Hubble Data (OHD), Baryonic Acoustic Oscillation (BAO) measurements, and Quasi-Stellar Objects (QSO) data. For the QSO dataset, we propose an analytical expression for errors in comoving distance to circumvent the reliance on Monte Carlo simulations. Using kinematic diagnostics such as the deceleration and jerk parameters and Om diagnostic, we assess deviations of the proposed models from <span><math><mi>Λ</mi></math></span>CDM. Our joint analysis of the three datasets reveals that the transition redshift from a decelerated to an accelerated expansion of the universe for the GCG, MCG and VCG models is <span><math><mrow><mn>0</mn><mo>.</mo><mn>62</mn><msubsup><mrow><mn>0</mn></mrow><mrow><mo>−</mo><mn>0</mn><mo>.</mo><mn>017</mn></mrow><mrow><mo>+</mo><mn>0</mn><mo>.</mo><mn>018</mn></mrow></msubsup></mrow></math></span>, <span><math><mrow><mn>0</mn><mo>.</mo><mn>53</mn><msubsup><mrow><mn>7</mn></mrow><mrow><mo>−</mo><mn>0</mn><mo>.</mo><mn>017</mn></mrow><mrow><mo>+</mo><mn>0</mn><mo>.</mo><mn>017</mn></mrow></msubsup></mrow></math></span> and <span><math><mrow><mn>0</mn><mo>.</mo><mn>47</mn><msubsup><mrow><mn>0</mn></mrow><mrow><mo>−</mo><mn>0</mn><mo>.</mo><mn>012</mn></mrow><mrow><mo>+</mo><mn>0</mn><mo>.</mo><mn>012</mn></mrow></msubsup></mrow></math></span> respectively, indicating a departure from <span><math><mi>Λ</mi></math></span>CDM.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"483 ","pages":"Article 170266"},"PeriodicalIF":3.0,"publicationDate":"2025-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145360159","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 : 2025-10-21DOI: 10.1016/j.aop.2025.170271
Cristiano Rosa , Sergio Giardino
Within this article one finds the statement of the Klein–Gordon problem within the real Hilbert space formalism (HS) in terms of complex wave functions, and in terms of quaternionic wave functions as well. The complex formulation comprises hermitian and non-hermitian cases, while the quaternionic solutions additionally set in motion self-interacting particles. The non-hermitian cases comprise non-conservative processes, while the self-interaction physically implies the increase of the effective mass of the particle, an effect that cannot be reproduced using a complex wave function. The obtained autonomous particle solutions, as well as the Klein problem agree to the previously discovered self-interacting non-relativistic particle, and thus reinforce HS as viable and consistent way to explore open problems in quantum mechanics. Also important, the negative energy problem that plagues the usual formalism is eliminated within this approach.
{"title":"Klein–Gordon equation within the real Hilbert space formalism","authors":"Cristiano Rosa , Sergio Giardino","doi":"10.1016/j.aop.2025.170271","DOIUrl":"10.1016/j.aop.2025.170271","url":null,"abstract":"<div><div>Within this article one finds the statement of the Klein–Gordon problem within the real Hilbert space formalism (<span><math><mi>R</mi></math></span>HS) in terms of complex wave functions, and in terms of quaternionic wave functions as well. The complex formulation comprises hermitian and non-hermitian cases, while the quaternionic solutions additionally set in motion self-interacting particles. The non-hermitian cases comprise non-conservative processes, while the self-interaction physically implies the increase of the effective mass of the particle, an effect that cannot be reproduced using a complex wave function. The obtained autonomous particle solutions, as well as the Klein problem agree to the previously discovered self-interacting non-relativistic particle, and thus reinforce <span><math><mi>R</mi></math></span>HS as viable and consistent way to explore open problems in quantum mechanics. Also important, the negative energy problem that plagues the usual formalism is eliminated within this approach.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"483 ","pages":"Article 170271"},"PeriodicalIF":3.0,"publicationDate":"2025-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145413806","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}
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