Chinese Journal of Physics最新文献

{"title":"Exploring certain nonlinear localized modes in an anisotropic ferromagnet with biquadratic interaction using quasi-discrete approximation","authors":"S. Suganya ,&nbsp;B. Srividya ,&nbsp;A. Prabhu","doi":"10.1016/j.cjph.2024.09.036","DOIUrl":"10.1016/j.cjph.2024.09.036","url":null,"abstract":"<div><div>We present an analytical work on nonlinear localized modes in an anisotropic ferromagnet with added biquadratic interaction. Within the framework of quasi-discrete multiple scale approximation, it is found that the dynamics of the system is associated with the nonlinear Schrödinger (NLS) equation. The effect of anisotropic and biquadratic interactions on the nature of the linear dispersion curve is discussed. The criteria for the existence of bright and dark solitons are explored. Different classes of soliton solutions are constructed using the Hirota bilinearization method. Also, it is noted that the system and soliton parameters significantly modify the characteristics of the solitons by the inclusion of highly nonlinear invariant biquadratic interaction.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 809-823"},"PeriodicalIF":4.6,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142526143","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":"Analysis of the multi-term fractional Bateman equations in radioactive decay by means of Mikusiński algebraic calculus","authors":"Marc Jornet","doi":"10.1016/j.cjph.2024.10.002","DOIUrl":"10.1016/j.cjph.2024.10.002","url":null,"abstract":"<div><div>Fractional Bateman equations model the concentrations of nuclear species through a radioactive decay chain, by considering non-Markovian behavior. Cruz-López and Espinosa-Paredes (Nuclear Engineering and Technology, 2022) solved the mathematical problem with a single memory coefficient, based on the Laplace-transform technique. Cruz-López, Espinosa-Paredes and François (Computer Physics Communications, 2022) extended the analysis to several fractional orders, with Laplace transforms and series expansions checked by induction. In this paper, we solve such a case of distinct memory effects, via the more general method of Mikusiński operational calculus. We do not distinguish between equal and different decay rates. Multivariate Mittag-Leffler functions appear in the closed-form expression.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 623-630"},"PeriodicalIF":4.6,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efficient Multi-party Quantum Secret-Sharing Protocol","authors":"Xiangjun Xin ,&nbsp;Fan He ,&nbsp;Shujing Qiu ,&nbsp;Chaoyang Li ,&nbsp;Fagen Li","doi":"10.1016/j.cjph.2024.10.008","DOIUrl":"10.1016/j.cjph.2024.10.008","url":null,"abstract":"<div><h3>Context</h3><div>Quantum secret sharing allows one secret dealer to divide his/her secret among different participants. Only when all the participants pool their secret pieces together can the secret be reconstructed. Quantum secret-sharing protocol can provide high security for users who need to share some secret information among some partners. It is also a useful tool in many applications such as secure operations of joint sharing of quantum money, sharing ancilla states, and distributed quantum computation.</div></div><div><h3>Objective</h3><div>We propose a novel multi-party quantum secret-sharing protocol (MPQSSP).</div></div><div><h3>Methods</h3><div>In our protocol, the dealer mixes the particle sequence of the Bell states and sends the sequence to the participants. The participants encode their secret pieces into Pauli operators, which are applied to the received particle sequence. After annularly transmitting and operating the particle sequence, the participants return the particle sequence to the dealer, who can share a secret with the partners by measuring the returned sequence with the Bell basis.</div></div><div><h3>Results</h3><div>The proposed MPQSSP has the merits as follows. First, its qubit efficiency can be 100% when the sample bits of the secret and the corresponding sample qubits are ignored (In our protocol when the qubit efficiency is computed, the sample bits and the corresponding Bell states used to check eavesdropping are ignored). Second, it can protect participants' privacy and interests, since the dealer cannot derive the secret piece of any participant although he/she masters the secret. Third, the participants need not perform many quantum operations and measurements to check the eavesdropping, which helps improve the efficiency of the protocol. Fourth, compared with most of the similar MPQSSPs, the quantum resources of the proposed one are relatively easier to prepare. At last, the proposed protocol has the security against various eavesdropping attacks.</div></div><div><h3>Conclusion</h3><div>The merits above show that Our MPQSSP is relatively more practical and efficient than similar ones.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417820","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":"Meta-optics empowered by all-silicon quarter-wave plates for generating focused vortex beams","authors":"Hui Li ,&nbsp;Jie Li ,&nbsp;Chenhui Zhao ,&nbsp;Chenglong Zheng ,&nbsp;Hang Xu ,&nbsp;Wenhui Xu ,&nbsp;Qi Tan ,&nbsp;Chunyu Song ,&nbsp;Yun Shen ,&nbsp;Jianquan Yao","doi":"10.1016/j.cjph.2024.10.005","DOIUrl":"10.1016/j.cjph.2024.10.005","url":null,"abstract":"<div><div>The Poynting vector associated with the focused vortex beam (FVB) that carries orbital angular momentum (OAM) is oriented in a twisted manner relative to the principal axis of propagation. This characteristic has significant applications in advanced fields, including high-dimensional information processing, high-resolution imaging, and particle manipulation. Currently, complex optical systems that operate on alignment principles for generating FVBs have been miniaturized by metasurfaces, resulting in the achievement of polarization-dependent vectorized behavior. Nevertheless, generating and manipulating FVBs that carry OAM in the terahertz (THz) range remains a significant challenge. This difficulty arises particularly when utilizing quarter-wave plates (QWPs) that serve both polarization conversion and polarization filtering functions. Here, we experimentally demonstrate a planar all-dielectric array capable of generating FVBs with high power density within a single-handed circularly polarized channel. Engineered QWP meta-atoms are utilized as candidates for the efficient generation of the desired FVB through the application of dynamic phase gradients. A series of samples were fabricated to assess the effectiveness of this design strategy in converting an incident linearly polarized THz beam into arbitrary single-handed circularly polarized FVBs. Leveraging the high degree of freedom inherent in polarization multiplexing coding, the proposed QWP metasurface can generate FVBs exhibiting topological charge evolution along the longitudinal direction. This capability further underscores its robust polarization modulation proficiency. This work presents a generalized framework for the polarization-dependent generation of ultracompact structural optical fields, which may have potential applications in highly integrated THz communication systems.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 651-663"},"PeriodicalIF":4.6,"publicationDate":"2024-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417948","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":"Hetero-Bäcklund transformation, bilinear forms and multi-solitons for a (2＋1)-dimensional generalized modified dispersive water-wave system for the shallow water","authors":"Xin-Yi Gao","doi":"10.1016/j.cjph.2024.10.004","DOIUrl":"10.1016/j.cjph.2024.10.004","url":null,"abstract":"<div><div>This shallow-water-directed paper plans to consider a (2＋1)-dimensional generalized modified dispersive water-wave (2DGMDWW) system, which describes the nonlinear and dispersive long gravity waves travelling along two horizontal directions in the shallow water of uniform depth. With symbolic computation, (1) a hetero-Bäcklund transformation is constructed, coupling the solutions as for the 2DGMDWW system with the solutions as for a known (2＋1)-dimensional Boiti-Leon-Pempinelli system describing the water waves in an infinitely narrow channel of constant depth, with that hetero-Bäcklund transformation dependent on the shallow-water coefficients in the 2DGMDWW system, with the former solutions indicating certain shallow-water-wave patterns for the height of the water surface and the horizontal velocity of the water wave, while with the latter solutions related to the horizontal velocity and elevation of the water wave; (2) two sets of the bilinear forms are obtained, each set of which is shown to depend on the shallow-water coefficients in the 2DGMDWW system and to be linked to certain shallow-water-wave patterns for the height of the water surface and the horizontal velocity of the water wave; and (3) two sets of the <span><math><mi>N</mi></math></span>-soliton solutions are also worked out, each set of which is seen to rely on the shallow-water coefficients in the 2DGMDWW system and to represent the existence of <span><math><mi>N</mi></math></span>-solitonic shallow-water-wave patterns with respect to the height of the water surface and the horizontal velocity of the water wave, with <span><math><mi>N</mi></math></span> as a positive integer.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 1233-1239"},"PeriodicalIF":4.6,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658491","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":"Conserved mutual information for discrete and continuous variables in dilaton black hole","authors":"Shu-Min Wu ,&nbsp;Xiao-Wei Teng ,&nbsp;Hao-Yu Wu ,&nbsp;Jin-Xuan Li ,&nbsp;Xiao-Li Huang ,&nbsp;Rui Bao","doi":"10.1016/j.cjph.2024.09.039","DOIUrl":"10.1016/j.cjph.2024.09.039","url":null,"abstract":"<div><div>The information paradox of black holes has always been a hot topic at the forefront of theoretical physics. In this paper, we aim to understand the information paradox of the dilaton black hole from the perspective of the total correlation quantified by mutual information between the initial subsystems <span><math><mi>A</mi></math></span> and <span><math><mi>B</mi></math></span>. We find that the dilaton gravity can redistribute initial mutual information for discrete and continuous variables between the subsystems <span><math><mi>A</mi></math></span> and <span><math><mi>B</mi></math></span>, but cannot redistribute initial entanglement. Interestingly, the sum of physically accessible and inaccessible mutual information is equal to the initial mutual information. Therefore, physically accessible mutual information is transformed into physically inaccessible mutual information by the dilaton gravity of the black hole. From the perspective of mutual information, the information of black holes is conserved and not lost.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 755-765"},"PeriodicalIF":4.6,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142445598","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 improved regular Kerr black holes","authors":"Chiang-Mei Chen ,&nbsp;Yi Chen ,&nbsp;Akihiro Ishibashi ,&nbsp;Nobuyoshi Ohta","doi":"10.1016/j.cjph.2024.10.001","DOIUrl":"10.1016/j.cjph.2024.10.001","url":null,"abstract":"<div><div>We study the quantum improvement of Kerr black holes with mass-dependent scale identifications in asymptotically safe gravity. We find that a physically sensible identification can only be a function of <span><math><mrow><mi>M</mi><mi>r</mi></mrow></math></span> and the area <span><math><mrow><mi>A</mi><mo>=</mo><mn>4</mn><mi>π</mi><mrow><mo>(</mo><msup><mrow><mi>r</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>+</mo><msup><mrow><mi>a</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>)</mo></mrow></mrow></math></span> where <span><math><mi>M</mi></math></span> is the mass of the black hole and <span><math><mi>a</mi></math></span> is an angular momentum parameter. We then discuss various properties of the rotating quantum black holes for a simple choice of the identification. We show that the resulting regular rotating black holes have the following nice properties: (i) admitting a consistent black hole thermodynamics at the horizon, (ii) resolving the ring singularity, (iii) partially eliminating closed time-like curves present in the classical Kerr black holes.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 766-778"},"PeriodicalIF":4.6,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142445599","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":"Flux dynamics, anisotropy in Jc and vortex phase diagram of H+-intercalated FeSe single crystal","authors":"Zhiwei Wen ,&nbsp;Tao Jia ,&nbsp;Yusen Xiao ,&nbsp;Yuxian Wu ,&nbsp;Yong Li ,&nbsp;Shulong Li ,&nbsp;Yajing Cui ,&nbsp;Ruidan Zhong ,&nbsp;Yongliang Chen ,&nbsp;Cuihua Cheng ,&nbsp;Yong Zhao","doi":"10.1016/j.cjph.2024.09.042","DOIUrl":"10.1016/j.cjph.2024.09.042","url":null,"abstract":"<div><div>This paper investigates the superconductivity, pinning, and vortex dynamics of FeSe before and after protonation. The study shows that, after being protonated, FeSe's superconducting critical temperature <em>T</em>_c has been increased to more than 40 K and the critical current density <em>J</em>_c has also been increased from 2.1 × 10⁴ A/cm² to 1.2 × 10⁶ A/cm², with significantly larger magnetic relaxation rates (<em>Q</em>). Meanwhile, the critical current density anisotropy (<em>γ</em>) decreases substantially while the upper critical field <em>H</em>_c2 increases from 13 T to 91 T after protonation. In addition, the reasons for the absence of the second peak effect in H<em>_x</em>-FeSe were explored. This investigation also reveals the existence of the vortex phase transition associated with the pinning behavior in protonated FeSe, demonstrated by the foot-like characteristics of resistivity. Based on these results, the vortex phase diagrams of FeSe before and after protonation were established. These findings provide important insights for exploring new high-temperature superconductors and their magnetic flux dynamics through protonation.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 721-731"},"PeriodicalIF":4.6,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441578","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":"Impact of flexible walls of curved channel on biological flow of Reiner–Rivlin fluid","authors":"S. Hina","doi":"10.1016/j.cjph.2024.09.045","DOIUrl":"10.1016/j.cjph.2024.09.045","url":null,"abstract":"<div><div>In this study, the Reiner–Rivlin fluid model is opted for examination as the complex dynamical fluid and is flowing on account of the waves travelling on the walls of flexible curved channel. The governing equations are solved analytically up to the first order to analyse the velocity profiles. As the governing equation is highly nonlinear, so the problem is solved by regular perturbation technique about small wave number. After the implication of regular perturbation, the second order Cauchy Euler ordinary differential equations are obtained for both the systems. A detailed analysis is conducted on the effects of diverse factors, such as the rheological properties of fluid, the curvature radius of the channel, the wave amplitude and the wall properties. The velocity of the fluid enhanced by increasing wall properties parameters, wave number, Reynolds number and the amplitude ratio parameter. It is also observed that the Reiner–Rivlin fluid flows slowly as compare to the Newtonian fluid, this type of findings can be helpful for the understanding of many physiological processes, like blood flow and food swallowing. This study enlightens the interaction between the curved nature of the channel and Reiner–Rivlin fluid flow in peristalsis that can be a great contribution for the designing of biomedical devices. Such types of problems have great significance in many physiological processes and engineering applications like microfluidic devices and drug delivery systems.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 849-856"},"PeriodicalIF":4.6,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142526144","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":"Entanglement, quantum steering, and Bell nonlocality in the Tavis–Cummings system","authors":"Biao-Liang Ye","doi":"10.1016/j.cjph.2024.09.040","DOIUrl":"10.1016/j.cjph.2024.09.040","url":null,"abstract":"<div><div>In this work, we focus on quantum correlations, specifically entanglement, quantum steering, and Bell nonlocality within the Tavis–Cummings model. This study investigates these quantum correlations in the context of various fields existing in the cavity. The findings reveal the hierarchy of quantum correlations—entanglement, quantum steering, and Bell nonlocality—in two two-level atoms under the influence of thermal, coherent, and squeezed vacuum states. The dynamic process demonstrates certain oscillations, with particular emphasis on the presence of asymmetric quantum steering.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 554-564"},"PeriodicalIF":4.6,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417945","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}