Modern Physics Letters A最新文献

{"title":"Formation of supermassive black holes from N self-gravitating small black holes: A thermodynamic study","authors":"Baljeet Kaur Lotte, Prasanta Kumar Mahapatra, Subodha Mishra","doi":"10.1142/s0217732324500512","DOIUrl":"https://doi.org/10.1142/s0217732324500512","url":null,"abstract":"<p>Both statistical and thermodynamic aspects are used to analyze the collapse of <i>N</i> self-gravitating black holes that result in the formation of supermassive black holes. The change in energy and entropy of the system in relation to the masses of the constituent black holes and their numbers are obtained. The transition temperature for the change from the high-temperature interacting gas (or particles) to the low-temperature condensed state of black holes in forming supermassive black hole is determined.</p>","PeriodicalId":18752,"journal":{"name":"Modern Physics Letters A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140798285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Atmospheric Neutrino octant from flavor symmetry","authors":"Paul H. Frampton, Claudio Corianò, Pietro Santorelli","doi":"10.1142/s0217732324500287","DOIUrl":"https://doi.org/10.1142/s0217732324500287","url":null,"abstract":"<p>The binary tetrahedral group (<span><math altimg=\"eq-00001.gif\" display=\"inline\" overflow=\"scroll\"><msup><mrow><mi>T</mi></mrow><mrow><mi>′</mi></mrow></msup></math></span><span></span>) has provided the most successful flavor symmetry in understanding simultaneously the three mixing angles both for quarks in the CKM matrix and for neutrinos in the PMNS matrix. One prediction, invariant under leptonic CP violation, relates the atmospheric and reactor neutrino mixings <span><math altimg=\"eq-00002.gif\" display=\"inline\" overflow=\"scroll\"><msub><mrow><mi>θ</mi></mrow><mrow><mn>3</mn><mn>2</mn></mrow></msub></math></span><span></span> and <span><math altimg=\"eq-00003.gif\" display=\"inline\" overflow=\"scroll\"><msub><mrow><mi>θ</mi></mrow><mrow><mn>1</mn><mn>3</mn></mrow></msub></math></span><span></span>, respectively. We study sedulously this relation using the latest neutrino data. It is natural to focus on the frustrating experimental octant ambiguity of <span><math altimg=\"eq-00004.gif\" display=\"inline\" overflow=\"scroll\"><msub><mrow><mi>θ</mi></mrow><mrow><mn>3</mn><mn>2</mn></mrow></msub></math></span><span></span>. We conclude that the flavor symmetry requires that <span><math altimg=\"eq-00005.gif\" display=\"inline\" overflow=\"scroll\"><msub><mrow><mi>θ</mi></mrow><mrow><mn>3</mn><mn>2</mn></mrow></msub></math></span><span></span> is in the second octant <span><math altimg=\"eq-00006.gif\" display=\"inline\" overflow=\"scroll\"><msub><mrow><mi>θ</mi></mrow><mrow><mn>3</mn><mn>2</mn></mrow></msub><mo>&gt;</mo><mn>4</mn><msup><mrow><mn>5</mn></mrow><mrow><mo>∘</mo></mrow></msup></math></span><span></span>, not in the first one <span><math altimg=\"eq-00007.gif\" display=\"inline\" overflow=\"scroll\"><msub><mrow><mi>θ</mi></mrow><mrow><mn>3</mn><mn>2</mn></mrow></msub><mo>&lt;</mo><mn>4</mn><msup><mrow><mn>5</mn></mrow><mrow><mo>∘</mo></mrow></msup></math></span><span></span>, and eagerly await experimental confirmation of this prediction.</p>","PeriodicalId":18752,"journal":{"name":"Modern Physics Letters A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140623436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Comments on oscillations in elastic scattering of hadrons","authors":"S. M. Troshin, N. E. Tyurin","doi":"10.1142/s0217732324750014","DOIUrl":"https://doi.org/10.1142/s0217732324750014","url":null,"abstract":"<p>The observed absence of the small-<i>t</i> oscillations in differential cross-section of the elastic scattering is considered as a consequence of the reflective scattering mode appearance at the highest energy of the LHC <span><math altimg=\"eq-00001.gif\" display=\"inline\" overflow=\"scroll\"><msqrt><mrow><mi>s</mi></mrow></msqrt><mo>=</mo><mn>1</mn><mn>3</mn></math></span><span></span><span><math altimg=\"eq-00002.gif\" display=\"inline\" overflow=\"scroll\"><mspace width=\".17em\"></mspace></math></span><span></span>TeV.</p>","PeriodicalId":18752,"journal":{"name":"Modern Physics Letters A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140623426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Einstein–Podolsky–Rosen steering paradox “2=1” for N qubits","authors":"Zhi-Jie Liu, Jie Zhou, Hui-Xian Meng, Xing-Yan Fan, Mi Xie, Fu-Lin Zhang, Jing-Ling Chen","doi":"10.1142/s0217732324500305","DOIUrl":"https://doi.org/10.1142/s0217732324500305","url":null,"abstract":"<p>Einstein–Podolsky–Rosen (EPR) paradox highlights the absence of a local realistic explanation for quantum mechanics, and shows the incompatibility of the local-hidden-state models with quantum theory. For <i>N</i>-qubit states, or more importantly, the <i>N</i>-qubit mixed states, we present the EPR steering paradox in the form of the contradictory equality “<span><math altimg=\"eq-00003.gif\" display=\"inline\" overflow=\"scroll\"><mn>2</mn><mo>=</mo><mn>1</mn></math></span><span></span>”. We show that the contradiction holds for any <i>N</i>-qubit state as long as both “the pure state requirement” and “the measurement requirement” are satisfied. This also indicates that the EPR steering paradox exists in more general cases. Finally, we give specific examples to demonstrate and analyze our arguments.</p>","PeriodicalId":18752,"journal":{"name":"Modern Physics Letters A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140623493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Tripartite quantum teleportation in de Sitter spacetime","authors":"Zhiming Huang, Xiangfu Zou, Haozhen Situ, Zhimin He, Lianghui Zhao, Yiyong Ye, Zhenbang Rong","doi":"10.1142/s0217732324500330","DOIUrl":"https://doi.org/10.1142/s0217732324500330","url":null,"abstract":"<p>In this paper, a tripartite quantum teleportation scheme in de Sitter vacuum is constructed. Then we investigate the influence of vacuum fluctuation, temperature and two-atom distance on performance of the tripartite quantum teleportation. It is found that fidelity drops fast with temperature and evolution time increasing. While temperature is low relatively, the influence of two-atom distance cannot be negligible, the change of fidelity is different with two-atom separation and time varying. The results may be helpful for dealing with quantum information tasks in curve spacetime and exploring the properties of curve spacetime through quantum information means.</p>","PeriodicalId":18752,"journal":{"name":"Modern Physics Letters A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140623494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Effects of the new type of extended uncertainty principle on Van der Waals black hole thermodynamics: A theoretical and deep learning approach","authors":"Abdelhakim Benkrane, Djamel Eddine Zenkhri, Abderrahmane Benhadjira","doi":"10.1142/s021773232450041x","DOIUrl":"https://doi.org/10.1142/s021773232450041x","url":null,"abstract":"<p>In this paper, we study the Van der Waals black holes (the case <span><math altimg=\"eq-00001.gif\" display=\"inline\" overflow=\"scroll\"><mi>b</mi><mo>=</mo><mn>0</mn></math></span><span></span>) in the anti-de Sitter space under the effect of the linear extended uncertainty principle (EUP). The analysis was undertaken using deep learning by employing physics-informed neural networks in addition to the semi-classical approach, we have calculated the thermal quantities, including mass, volume, temperature, entropy, and Gibbs free energy. Additionally, we visually depict the effects of the EUP-term on the thermodynamic properties of the studied black holes.</p>","PeriodicalId":18752,"journal":{"name":"Modern Physics Letters A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140561098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Efficient and secure semi-quantum private comparison protocol using three-particle GHZ-like states against participant attack","authors":"Chun-Wei Yang, Yu-Yun Huang, Jason Lin, Chia-Wei Tsai","doi":"10.1142/s0217732324500378","DOIUrl":"https://doi.org/10.1142/s0217732324500378","url":null,"abstract":"<p>This study identifies a participant attack vulnerability in Li <i>et al</i>.’s SQPC protocol. The participant attack allows a malicious participant, Bob, to obtain the participant Alice’s secret information by intercepting and measuring photons sent to Alice, and later decrypting Alice’s encrypted comparison result. An improved SQPC protocol is proposed to address this problem. The key enhancement is introducing a mutual eavesdropping check requiring the third party and participants to verify they obtain the same photon measurement results. This enables detecting participant attacks like the one identified. The SQPC protocol proposed in this study not only withstands attacks from internal participants but also achieves quantum efficiency almost equivalent to Li <i>et al</i>.’s SQPC protocol. Thus, this study presents a more secure SQPC protocol without compromising quantum efficiency.</p>","PeriodicalId":18752,"journal":{"name":"Modern Physics Letters A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140561432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Squeezing effect on D+∕D− with nonzero chemical potential","authors":"Hong-Jie Yin, Jia-Hui Feng, Yong Zhang","doi":"10.1142/s0217732324500421","DOIUrl":"https://doi.org/10.1142/s0217732324500421","url":null,"abstract":"<p>The medium mass modification may lead to a squeezing effect. In the baryonic medium, the mass of <i>D</i> meson was expected to reduce and the in-medium masses of <span><math altimg=\"eq-00003.gif\" display=\"inline\" overflow=\"scroll\"><msup><mrow><mi>D</mi></mrow><mrow><mo>+</mo></mrow></msup></math></span><span></span> and <span><math altimg=\"eq-00004.gif\" display=\"inline\" overflow=\"scroll\"><msup><mrow><mi>D</mi></mrow><mrow><mo>−</mo></mrow></msup></math></span><span></span> may show a splitting effect, and the chemical potential of <i>D</i> meson may be not zero. We study the squeezing effect on the yield ratio <span><math altimg=\"eq-00005.gif\" display=\"inline\" overflow=\"scroll\"><msup><mrow><mi>D</mi></mrow><mrow><mo>+</mo></mrow></msup><mo stretchy=\"false\">∕</mo><msup><mrow><mi>D</mi></mrow><mrow><mo>−</mo></mrow></msup></math></span><span></span> with nonzero chemical potential. Due to the in-medium mass splitting, the squeezing effect on the momentum distributions of <span><math altimg=\"eq-00006.gif\" display=\"inline\" overflow=\"scroll\"><msup><mrow><mi>D</mi></mrow><mrow><mo>+</mo></mrow></msup></math></span><span></span> and <span><math altimg=\"eq-00007.gif\" display=\"inline\" overflow=\"scroll\"><msup><mrow><mi>D</mi></mrow><mrow><mo>−</mo></mrow></msup></math></span><span></span> are different. Without the squeezing effect, the yield ratio <span><math altimg=\"eq-00008.gif\" display=\"inline\" overflow=\"scroll\"><msup><mrow><mi>D</mi></mrow><mrow><mo>+</mo></mrow></msup><mo stretchy=\"false\">∕</mo><msup><mrow><mi>D</mi></mrow><mrow><mo>−</mo></mrow></msup></math></span><span></span> remains constant as the transverse momentum increases. The yield ratio <span><math altimg=\"eq-00009.gif\" display=\"inline\" overflow=\"scroll\"><msup><mrow><mi>D</mi></mrow><mrow><mo>+</mo></mrow></msup><mo stretchy=\"false\">∕</mo><msup><mrow><mi>D</mi></mrow><mrow><mo>−</mo></mrow></msup></math></span><span></span> is affected by the squeezing effect, resulting in a dependence on transverse momentum. An increase in transverse momentum leads to a decrease in the yield ratio, especially when there is a high chemical potential. Additionally, the in-medium mass splitting amplifies this phenomenon. The yield ratio <span><math altimg=\"eq-00010.gif\" display=\"inline\" overflow=\"scroll\"><msup><mrow><mi>D</mi></mrow><mrow><mo>+</mo></mrow></msup><mo stretchy=\"false\">∕</mo><msup><mrow><mi>D</mi></mrow><mrow><mo>−</mo></mrow></msup></math></span><span></span> with nonzero chemical potential approaches 1 when there is a large average in-medium mass reduction, which becomes more evident at higher transverse momentum. The study of the squeezing effect on the yield ratio <span><math altimg=\"eq-00011.gif\" display=\"inline\" overflow=\"scroll\"><msup><mrow><mi>D</mi></mrow><mrow><mo>+</mo></mrow></msup><mo stretchy=\"false\">∕</mo><msup><mrow><mi>D</mi></mrow><mrow><mo>−</mo></mrow></msup></math></span><span></span> with nonzero chemical potential may be meaningful for the CBM and PANDA experiments ","PeriodicalId":18752,"journal":{"name":"Modern Physics Letters A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140598594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 thermodynamics of small systems: The anyonic otto engine","authors":"H. S. Mani, N. Ramadas, V. V. Sreedhar","doi":"10.1142/s0217732324500202","DOIUrl":"https://doi.org/10.1142/s0217732324500202","url":null,"abstract":"<p>Recent advances in applying thermodynamic ideas to quantum systems have raised the novel prospect of using non-thermal, non-classical sources of energy, of purely quantum origin, like quantum statistics, to extract mechanical work in macroscopic quantum systems like Bose–Einstein condensates. On the other hand, thermodynamic ideas have also been applied to small systems like single molecules and quantum dots. In this paper, we study the quantum thermodynamics of small systems of anyons, with specific emphasis on the quantum Otto engine which uses, as its working medium, just one or two anyons. Formulae are derived for the efficiency of the Otto engine as a function of the statistics parameter.</p>","PeriodicalId":18752,"journal":{"name":"Modern Physics Letters A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140561271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Statistical properties of the 𝒜κ<0 Weyl–Heisenberg algebra coherent states","authors":"M. Alaoui, E. Mouhaoui, B. Maroufi, M. Daoud","doi":"10.1142/s021773232450024x","DOIUrl":"https://doi.org/10.1142/s021773232450024x","url":null,"abstract":"<p>In this paper, we study the one-parameter <span><math altimg=\"eq-00003.gif\" display=\"inline\" overflow=\"scroll\"><mi>κ</mi></math></span><span></span>-generalized oscillator algebra <span><math altimg=\"eq-00004.gif\" display=\"inline\" overflow=\"scroll\"><msub><mrow><mi mathvariant=\"cal\">𝒜</mi></mrow><mrow><mi>κ</mi></mrow></msub></math></span><span></span> (which includes the case of the standard Weyl–Heisenberg algebra). This algebra admits representations of finite-dimensional for negative values of the parameter <span><math altimg=\"eq-00005.gif\" display=\"inline\" overflow=\"scroll\"><mi>κ</mi></math></span><span></span>. We construct the associated Perelomov like coherent states. We discuss their statistical properties. In particular, we derive the expressions of the Mandel parameter and Husimi function and we discuss the squeezing of the <span><math altimg=\"eq-00006.gif\" display=\"inline\" overflow=\"scroll\"><msub><mrow><mi mathvariant=\"cal\">𝒜</mi></mrow><mrow><mi>κ</mi></mrow></msub></math></span><span></span> coherent states.</p>","PeriodicalId":18752,"journal":{"name":"Modern Physics Letters A","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140561092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}