Physics Letters B最新文献

{"title":"Quantum steering for different types of Bell-like states in gravitational background","authors":"Si-Han Li,&nbsp;Si-Han Shang,&nbsp;Shu-Min Wu","doi":"10.1016/j.physletb.2025.139895","DOIUrl":"10.1016/j.physletb.2025.139895","url":null,"abstract":"<div><div>In a relativistic framework, it is generally accepted that quantum steering of maximally entangled states provides greater advantages in practical applications compared to non-maximally entangled states. In this paper, we investigate quantum steering for four different types of Bell-like states of fermionic modes near the event horizon of a Schwarzschild black hole. In some parameter spaces, the peak of steering asymmetry corresponds to a transition from two-way to one-way steerability for Bell-like states under the influence of the Hawking effect. It is intriguing to find that the fermionic steerability of the maximally entangled states experiences sudden death with the Hawking temperature, while the fermionic steerability of the non-maximally entangled states maintains indefinite persistence at infinite Hawking temperature. In contrast to prior research, this finding suggests that quantum steering of non-maximally entangled states is more advantageous than that of maximally entangled states for processing quantum tasks in the gravitational background. This surprising result overturns the traditional idea of “the advantage of maximally entangled steering in the relativistic framework” and provides a new perspective for understanding the Hawking effect of the black hole.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139895"},"PeriodicalIF":4.5,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"First high-resolution in-beam γ-ray spectroscopy of neutron-rich Mo isotopes at relativistic energy","authors":"B. Moon ,&nbsp;W. Korten ,&nbsp;K. Wimmer ,&nbsp;P. Doornenbal ,&nbsp;T.R. Rodríguez ,&nbsp;K. Yanase ,&nbsp;T. Otsuka ,&nbsp;N. Aoi ,&nbsp;H. Baba ,&nbsp;F. Browne ,&nbsp;C. Campbell ,&nbsp;S. Chen ,&nbsp;Z. Chen ,&nbsp;H. Crawford ,&nbsp;H. De Witte ,&nbsp;C. Fransen ,&nbsp;H. Hess ,&nbsp;E. Ideguchi ,&nbsp;S. Iwazaki ,&nbsp;J. Kim ,&nbsp;Y. Yamamoto","doi":"10.1016/j.physletb.2025.139904","DOIUrl":"10.1016/j.physletb.2025.139904","url":null,"abstract":"<div><div>High-resolution in-beam <span><math><mi>γ</mi></math></span>-ray spectroscopy of the neutron-rich <span><math><msup><mrow></mrow><mn>110</mn></msup></math></span>Mo<span><math><msub><mrow></mrow><mn>68</mn></msub></math></span> and <span><math><msup><mrow></mrow><mn>112</mn></msup></math></span>Mo<span><math><msub><mrow></mrow><mn>70</mn></msub></math></span> isotopes was performed for the first time at relativistic energies. This experiment was conducted at the Radioactive Isotope Beam Factory (RIBF), RIKEN. The <span><math><msup><mrow></mrow><mn>110</mn></msup></math></span>Mo and <span><math><msup><mrow></mrow><mn>112</mn></msup></math></span>Mo isotopes were produced via nucleon removal reactions of radioactive Mo and Tc ions, and the <span><math><mi>γ</mi></math></span> rays emitted following these reactions were measured using the High-resolution Cluster Array at RIBF (HiCARI). Doppler-corrected energy spectra enabled the precise determination of transition energies and half-lives through the line-shape method. In addition to providing new lifetime information, the level scheme of <span><math><msup><mrow></mrow><mn>112</mn></msup></math></span>Mo was extended, including the <span><math><mi>γ</mi></math></span>-band structure, and the precision of existing level energies was significantly improved. Using the lifetime data, reduced transition probabilities were deduced. The <span><math><mrow><mi>B</mi><mo>(</mo><mi>E</mi><mn>2</mn><mo>;</mo><msubsup><mn>2</mn><mn>1</mn><mo>+</mo></msubsup><mo>→</mo><msubsup><mn>0</mn><mn>1</mn><mo>+</mo></msubsup><mo>)</mo></mrow></math></span> values indicate large collectivity and deformation, while the properties of the <span><math><msubsup><mn>2</mn><mn>2</mn><mo>+</mo></msubsup></math></span> states and their decay to the ground-state band point to an increase in triaxial deformation from mid-shell toward <span><math><mrow><mi>N</mi><mo>=</mo><mn>70</mn></mrow></math></span>. To interpret these findings, two theoretical models were applied and compared with the experimental results highlighting the importance of triaxial deformation.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139904"},"PeriodicalIF":4.5,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Probing the weak gravity conjecture: Novel Aschenbach signatures in superextremal non-linear charged AdS black holes","authors":"Mohammad Reza Alipour ,&nbsp;Mohammad Ali S. Afshar ,&nbsp;Saeed Noori Gashti ,&nbsp;Behnam Pourhassan ,&nbsp;Jafar Sadeghi","doi":"10.1016/j.physletb.2025.139902","DOIUrl":"10.1016/j.physletb.2025.139902","url":null,"abstract":"<div><div>This study investigates the nonlinear charged Anti-de Sitter (AdS) black hole solution within the framework of massive gravity, motivated by recent advancements linking the Weak Gravity Conjecture (WGC) to phenomena such as Weak Cosmic Censorship Conjecture (WCCC) and photon sphere dynamics. Building on these foundations, we focus on the Aschenbach effect–a relativistic phenomenon intricately tied to the geometry of photon spheres and known to occur in some special sub-extremal non rotating black holes. Our primary objective is to determine whether this effect persists not only up to the extremal limit but also beyond, into the superextremal regime, thus probing the stability and validity of black hole characteristics in these extreme conditions. By analyzing the nonlinear charged AdS black hole solutions in massive gravity, we demonstrate that the Aschenbach effect remains a robust feature across both extremal and superextremal configurations. This extension suggests that key relativistic signatures and the underlying spacetime structures associated with high-spin black holes continue to hold beyond classical boundaries. Our results provide new insights into the behavior of ultra-compact objects and highlight promising directions for exploring the limits of general relativity, as well as potential generalizations of the WGC and WCC in strong gravitational fields.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139902"},"PeriodicalIF":4.5,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Interaction of exact gravitational waves with matter","authors":"Morteza Mohseni, Saurya Das","doi":"10.1016/j.physletb.2025.139897","DOIUrl":"https://doi.org/10.1016/j.physletb.2025.139897","url":null,"abstract":"We consider interactions of exact (i.e., solutions of full nonlinear field equations) gravitational waves with matter by using the Einstein-Boltzmann equation. For a gravitational wave interacting with a system of massless particles, we compute the perturbed energy-momentum tensor and obtain explicit form of a set of Einstein-Boltzmann equations. We find solution to this system of equations to obtain the gravitational wave profile. The interaction superposes a static term on the gravitational wave profile which depends on the difference between square of the temperatures of the system in the absence and in the presence of the wave. We compute this perturbed term when the states of the system obey Bose-Einstein, Fermi-Dirac, and Maxwell-Boltzmann distributions, respectively. The relative strength of this term is roughly half for the Fermi-Dirac, and one-third for the Maxwell-Boltzmann distributions compared with that of the Bose-Einstein distribution. We consider both Minkowski and flat Friedmann-Robertson-Walker backgrounds.","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"155 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145182895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Photoneutron emission process on nuclei around A = 200 for giant dipole resonance energies based on neutron energy and angular distribution","authors":"Nguyen Thi Hong Thuong ,&nbsp;Toshiya Sanami ,&nbsp;Hirohito Yamazaki ,&nbsp;Nobuyuki Iwamoto ,&nbsp;Toshiro Itoga ,&nbsp;Yoichi Kirihara ,&nbsp;Eunji Lee ,&nbsp;Kenta Sugihara ,&nbsp;Shuji Miyamoto ,&nbsp;Satoshi Hashimoto ,&nbsp;Yoshihiro Asano","doi":"10.1016/j.physletb.2025.139900","DOIUrl":"10.1016/j.physletb.2025.139900","url":null,"abstract":"<div><div>Photoneutron emission processes in nuclei at approximately A = 200, including ¹⁸¹Ta, ^natW, ¹⁹⁷Au, ^natPb, and ²⁰⁹Bi, were identified based on experimental data of the photoneutron energy and angular distribution measured at a photon energy of 12.7 MeV, in addition to previously obtained data at 16.6 MeV. Based on these data, parameters describing the angular distributions obtained as a function of neutron energy for these targets were used to characterize the neutron emission processes. The parameters for high-energy photoneutrons are consistent with those of the resonance direct process related to the outermost nuclear shell, as proposed by Wilkinson in the mid-20th century. Conversely, parameters for low-energy photoneutrons, which exhibit an isotropic distribution, are indicative of the statistical decay of compound nuclei. For intermediate the energy range between these two extremes, an increasing angular dependence on the emitted photoneutron energy was observed for ¹⁹⁷Au, ^natPb, and ²⁰⁹Bi, suggesting a combination of the resonance direct process, the statistical decay process, and the pre-equilibrium process. For ¹⁸¹Ta and ^natW, the parameters exhibiting a peak in the intermediate range imply the contribution of the resonance direct process from transitions of another inner shell to the photoneutron emission.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139900"},"PeriodicalIF":4.5,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"First possible evidence of antimagnetic rotation in the A∼80 mass region","authors":"Yi-Chun Hao ,&nbsp;Zheng Qiao ,&nbsp;Hao Wang ,&nbsp;Ke-Yan Ma ,&nbsp;Guo-Mo Zeng","doi":"10.1016/j.physletb.2025.139875","DOIUrl":"10.1016/j.physletb.2025.139875","url":null,"abstract":"<div><div>The possible antimagnetic rotation in the <span><math><mrow><mi>A</mi><mo>∼</mo><mn>80</mn></mrow></math></span> mass region is revealed for the first time. The three positive-parity bands with the same <span><math><mrow><mi>π</mi><msubsup><mi>g</mi><mrow><mn>9</mn><mo>/</mo><mn>2</mn></mrow><mn>2</mn></msubsup><mo>⊗</mo><mi>ν</mi><msubsup><mi>g</mi><mrow><mn>9</mn><mo>/</mo><mn>2</mn></mrow><mrow><mo>−</mo><mn>4</mn></mrow></msubsup></mrow></math></span> configuration in the <span><math><mrow><mi>N</mi><mo>=</mo><mn>46</mn></mrow></math></span> isotones <span><math><msup><mrow></mrow><mn>84</mn></msup></math></span>Sr, <span><math><msup><mrow></mrow><mn>86</mn></msup></math></span>Zr and <span><math><msup><mrow></mrow><mn>88</mn></msup></math></span>Mo are investigated systematically by using the cranked shell model with pairing correlations taken into account by a particle-number-conserving treatment. The angular momentum alignments and the occupation probability of each cranked Nilsson orbital near the Fermi surface are discussed in details. The experimental <span><math><mrow><mi>B</mi><mo>(</mo><mi>E</mi><mn>2</mn><mo>)</mo></mrow></math></span> values of these bands are reproduced very well, which shows a typical decrease with increasing rotational frequency. The two-shears-like mechanism is exhibited by analyzing the closing of two pairs of valence neutron hole angular momentum vectors towards the resultant valence proton angular momentum vector. These strong signals indicate that antimagnetic rotation appears in the specific bands in the three isotones, and therefore the <span><math><mrow><mi>A</mi><mo>∼</mo><mn>80</mn></mrow></math></span> mass region is a possible new region of antimagnetic rotation. It is also the first case that the valence neutron angular momenta act as the movable blades in the two-shears-like mechanism of antimagnetic rotation.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139875"},"PeriodicalIF":4.5,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Quantum dynamical microscopic approach to stellar carbon burning","authors":"Grant Close,&nbsp;Paul Stevenson,&nbsp;Alexis Diaz-Torres","doi":"10.1016/j.physletb.2025.139881","DOIUrl":"10.1016/j.physletb.2025.139881","url":null,"abstract":"<div><div>The process of carbon burning is vital to understanding late stage stellar evolution of massive stars and the conditions of certain supernovae. Carbon burning is a complex problem, involving quantum tunnelling and nuclear molecular states. Quantum dynamical calculations of carbon burning are presented, combining the time-dependent wave-packet method and the density-constrained time-dependent Hartree-Fock (DC-TDHF) approach. We demonstrate that the state-of-the-art DC-TDHF interaction potential successfully explains the appearance of some resonant structures in the sub-barrier fusion cross-section. We study the dynamic response of the compound nucleus to further explain resonant structure seen in the Gamow energy region. The results show the critical role of nucleon-nucleon interactions and compound nucleus excitations in the <span><math><msup><mrow></mrow><mn>12</mn></msup></math></span>C + <span><math><msup><mrow></mrow><mn>12</mn></msup></math></span>C fusion resonances observed at astrophysical energies.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139881"},"PeriodicalIF":4.5,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145120108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"The statistical mechanics of Hawking radiation","authors":"Noah M. MacKay","doi":"10.1016/j.physletb.2025.139888","DOIUrl":"10.1016/j.physletb.2025.139888","url":null,"abstract":"<div><div>Hawking radiation and black hole thermodynamics are well understood in the frameworks of quantum field theory and general relativity, with contemporary extensions in string theory, AdS/CFT, and loop quantum gravity. However, an open question remains: <em>Can Hawking radiation be consistently described using statistical mechanics?</em> This challenge arises due to the ambiguous quantum nature of Hawking particles and constraints imposed by information conservation. This study develops a heuristic statistical model using a worldline Lagrangian formalism, treating Hawking particles as timelike with an effective mass and following an arbitrary statistical distribution. The flow of information is modeled as a transfer of microstates from the event horizon to the radiation background within a closed ensemble. From this framework, the Hawking particle mass <span><math><mrow><msub><mi>m</mi><mi>H</mi></msub><mo>=</mo><mi>ℏ</mi><mo>/</mo><mrow><mo>(</mo><mn>2</mn><mi>π</mi><msub><mi>r</mi><mi>S</mi></msub><mo>)</mo></mrow></mrow></math></span> is recovered, and the worldline Lagrangian yields the black hole’s thermal energy, <span><math><mrow><mi>E</mi><mo>=</mo><mi>ℏ</mi><mo>/</mo><mo>(</mo><mn>8</mn><mi>π</mi><mi>G</mi><mi>M</mi><mo>)</mo></mrow></math></span>. Beyond preserving conventional insights, reinforcing the statistical nature of black hole evaporation, this approach introduces novel perspectives: modeling the black hole as a structured energy well containing microstates, quantifying the evaporation rate of individual microstates, and determining the total number of microstates from the horizon’s surface area. This study leaves the door open for a stochastic mechanical analysis, which is introduced in the Discussion section.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139888"},"PeriodicalIF":4.5,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145103922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Soft quantum back reaction to the hubble tension: A smeared-out early time cosmological energy density","authors":"Alex E. Bernardini","doi":"10.1016/j.physletb.2025.139889","DOIUrl":"10.1016/j.physletb.2025.139889","url":null,"abstract":"<div><div>A theoretical explanation for the so-called Hubble tension is provided within the framework of phase-space quantum mechanics extended to (quantum) cosmology. Following a description of the overall nature of this tension, with due attention to recent observational developments, a quantum cosmology framework based on the Weyl-Wigner phase-space quantum approach is presented. This circumvents the discrepancy between early- and late-time Universe predictions for the Hubble constant, <span><math><msub><mi>H</mi><mn>0</mn></msub></math></span>. The emergence of quantum-origin corrections dependent on a single parameter — mediated by (generic) localized phase-space quantum states free of data analysis — yields predictions for <span><math><msub><mi>H</mi><mn>0</mn></msub></math></span> that smoothly interpolate between early- and late-time phenomenological values, thereby joining the plethora of solutions for the Hubble tension.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139889"},"PeriodicalIF":4.5,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145120107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Two loops, four tops and two γ5 schemes: A renormalization story","authors":"Stefano Di Noi ,&nbsp;Ramona Gröber","doi":"10.1016/j.physletb.2025.139878","DOIUrl":"10.1016/j.physletb.2025.139878","url":null,"abstract":"<div><div>We calculate the four-top quark operator contributions to the two-loop renormalization constants of the fermion and gluon fields, necessary to obtain the renormalization group equations for the fermion masses and the strong coupling constant. The computation has been carried out in the naïve dimensional regularization scheme for the <span><math><msub><mi>γ</mi><mn>5</mn></msub></math></span> matrix. We also discuss a strategy to translate the results into the Breitenlohner-Maison-t’Hooft-Veltman scheme and present the corresponding beta functions in both schemes.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"869 ","pages":"Article 139878"},"PeriodicalIF":4.5,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145103907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}