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Some Analytical Solutions to the Compressible Euler-Korteweg Equations 可压缩Euler-Korteweg方程的一些解析解
IF 1.3 4区 物理与天体物理
International Journal of Theoretical Physics Pub Date : 2025-03-29 DOI: 10.1007/s10773-025-05964-0
Jianwei Dong, Junhui Zhu, Litao Zhang
{"title":"Some Analytical Solutions to the Compressible Euler-Korteweg Equations","authors":"Jianwei Dong,&nbsp;Junhui Zhu,&nbsp;Litao Zhang","doi":"10.1007/s10773-025-05964-0","DOIUrl":"10.1007/s10773-025-05964-0","url":null,"abstract":"<div><p>When <span>(gamma =frac{3}{2})</span>, we construct some analytical solutions to the compressible Euler-Korteweg equations, where <span>(gamma )</span> is the adiabatic exponent. For the one-dimensional case, we provide a self-similar analytical solution for the vacuum free boundary problem on a finite interval, the vacuum free boundary problem on a half line and the Cauchy problem, respectively. From the constructed solutions, we find that the free boundary for the vacuum free boundary problem on a finite interval expands out linearly in time, this is same to the case when the capillarity force is absent. But for the vacuum free boundary problem on a half line and the Cauchy problem, we find that the capillarity effect plays a crucial role in preventing the smooth solutions from blowing up. We also extend these results to the <i>N</i>-dimensional radially symmetric case and the three-dimensional cylindrically symmetric case, respectively.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143726634","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}
引用次数: 0
Antimatter Gravity Experiments, the Astronomical Challenges to ΛCDM Cosmology and the Quantum Vacuum as a Possible Source of Gravity in the Universe 反物质重力实验，对ΛCDM宇宙学和量子真空作为宇宙引力可能来源的天文学挑战
IF 1.3 4区 物理与天体物理
International Journal of Theoretical Physics Pub Date : 2025-03-28 DOI: 10.1007/s10773-025-05954-2
Dragan Slavkov Hajdukovic
{"title":"Antimatter Gravity Experiments, the Astronomical Challenges to ΛCDM Cosmology and the Quantum Vacuum as a Possible Source of Gravity in the Universe","authors":"Dragan Slavkov Hajdukovic","doi":"10.1007/s10773-025-05954-2","DOIUrl":"10.1007/s10773-025-05954-2","url":null,"abstract":"<div><p>This review is motivated by the first result of the ALPHA-g experiment at CERN, which indicates that atoms and anti-atoms have different gravitational charges; according to measurements, the gravitational acceleration of anti-atoms is only 0.75 of that of ordinary matter. If confirmed by more precise measurements, this will greatly increase the plausibility of the emerging cosmological model, which is based on the working hypothesis that quantum vacuum fluctuations are virtual gravitational dipoles; a hypothesis that opens up the possibility that the quantum vacuum is a major source of gravity in the universe (which could eventually eliminate the need for the hypothetical dark matter and dark energy). This laboratory challenge to general relativity and ΛCDM cosmology is complemented by astronomical challenges (the Hubble tension, very fast initial growth of structures in the Universe, dark energy deviating from the cosmological constant…). The intriguing question is: do the antimatter gravity experiments at CERN and the recent astronomical observations point to the same (highly unexpected) new physics? With this question in mind, we briefly review the antimatter gravity experiments at CERN and elsewhere, together with the major astronomical challenges and the emerging Quantum Vacuum cosmology, which seems to be compatible with the ALPHA-g result and with the preliminary astronomical challenges to ΛCDM cosmology. The laboratory and astronomical challenges have suddenly taken us into terra incognita, where we need absolutely unprecedented imagination and open-minded thinking.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716896","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}
引用次数: 0
An Efficiency Enhanced Semi-Quantum Private Comparison Protocol via Provenance Distinguishable W-like State 基于源可分辨w态的效率增强半量子私有比较协议
IF 1.3 4区 物理与天体物理
International Journal of Theoretical Physics Pub Date : 2025-03-28 DOI: 10.1007/s10773-024-05830-5
Jian Li, Zhuo Wang, Jun Yang, Chongqiang Ye, Fanting Che, Anqi Fu
{"title":"An Efficiency Enhanced Semi-Quantum Private Comparison Protocol via Provenance Distinguishable W-like State","authors":"Jian Li,&nbsp;Zhuo Wang,&nbsp;Jun Yang,&nbsp;Chongqiang Ye,&nbsp;Fanting Che,&nbsp;Anqi Fu","doi":"10.1007/s10773-024-05830-5","DOIUrl":"10.1007/s10773-024-05830-5","url":null,"abstract":"<div><p>Semi-quantum communication and cryptography provides a solution to meet the potential threaten caused by quantum computational power in the period of the transition from classical computation to quantum computation, so the algorithms and protocols related with Semi-quantum technology has been become a research hotpot. Though many semi-quantum private comparison protocols were proposed to deal with the privacy protection in data computation in quantum era, most of them have relatively pessimistic efficiency in communication. In our scheme, By using the method of combining two W-like states and identifying the provenance of quantum states, the efficiency of similar semi-quantum privacy comparison is effectively improved. Therefore, the efficiency of this scheme is raised to 7.134% which is doubled compared with previous protocols via this thought of introduce different provenance states. Additionally, the analysis shows that the scheme also features inside and outside security.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716895","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}
引用次数: 0
Strange Meson Production in Au-Au and Cu-Cu Collisions at RHIC Energies 在RHIC能量下Au-Au和Cu-Cu碰撞中的奇异介子产生
IF 1.3 4区 物理与天体物理
International Journal of Theoretical Physics Pub Date : 2025-03-27 DOI: 10.1007/s10773-025-05959-x
Alamgir Khan, Yasir Ali, Uzma Tabassam, Taimoor Khurshid, Ali Zaman
{"title":"Strange Meson Production in Au-Au and Cu-Cu Collisions at RHIC Energies","authors":"Alamgir Khan,&nbsp;Yasir Ali,&nbsp;Uzma Tabassam,&nbsp;Taimoor Khurshid,&nbsp;Ali Zaman","doi":"10.1007/s10773-025-05959-x","DOIUrl":"10.1007/s10773-025-05959-x","url":null,"abstract":"<div><p>The transverse momentum spectra of <span>(K^{*}(892)^{0})</span> and <span>(phi (1020)^{0})</span> are analyzed as a function of <span>(p_{T})</span> in the range <span>( 0&lt; p_{T} &lt; 5 ;GeV/c)</span> and <span>( 0&lt; p_{T} &lt; 3.5 ;GeV/c)</span> in <span>(Au-Au)</span> and <span>(Cu-Cu)</span> collisions, in the mid-rapidity interval i.e. <span>(|y| &lt; 0.5)</span>. We have used PYTHIA8, EPOS-LHC, and EPOS-1.99 event generators for this study at <span>(sqrt{s_{NN}} = 62.4)</span> and <span>(200;GeV)</span>. In order to validate the models, Simulated distributions are compared with STAR Experimental data. The predictions obtained from PYTHIA8 shows good agreement with the STAR data, while the EPOS-LHC and EPOS-1.99 could not describe the STAR data very well. For the quantitative analysis the ratio: <span>(K^{*}(892)^{0}/K(498)^{0})</span> and <span>(phi (1020)^{0}/K(498)^{0})</span> is also presented. In this analysis TSallis fitting is used to extract freeze-out parameters.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10773-025-05959-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
Quantum Correlations in the XY Model Under a Non-Uniform Imaginary Magnetic Field 非均匀虚磁场下XY模型中的量子相关
IF 1.3 4区 物理与天体物理
International Journal of Theoretical Physics Pub Date : 2025-03-27 DOI: 10.1007/s10773-025-05952-4
Zhang Yunpeng, Yuan Shun, Chang Guohao, Hunduzi Halimjan, Ahmad Abliz
{"title":"Quantum Correlations in the XY Model Under a Non-Uniform Imaginary Magnetic Field","authors":"Zhang Yunpeng,&nbsp;Yuan Shun,&nbsp;Chang Guohao,&nbsp;Hunduzi Halimjan,&nbsp;Ahmad Abliz","doi":"10.1007/s10773-025-05952-4","DOIUrl":"10.1007/s10773-025-05952-4","url":null,"abstract":"<div><p>In non-Hermitian spin chain systems, spontaneous symmetry breaking induced by non-Hermiticity leads to significant differences in the behavior of quantum correlations compared to Hermitian quantum systems. This paper discusses the manipulation of quantum correlations in the Heisenberg XY spin chain model under an imaginary magnetic field. Based on the energy spectrum structure of the non-Hermitian spin chain system obtained in the biorthogonal basis, we analyzed the efficiency of nonuniform imaginary magnetic fields in the generation and dynamical control of quantum correlations. The results indicate that non-Hermitian spin chain systems subjected to uniform or nonuniform imaginary magnetic fields exhibit superior entanglement properties compared to systems under transverse real fields. In particular, when the PT-symmetry in the system is unbroken, the imaginary magnetic field monotonically enhances the thermal entanglement of the system. We observed entanglement sudden ‘death’ and ‘revival’ phenomena in the PT-symmetric region under a nonuniform imaginary magnetic field. In the PT-symmetry broken region, entanglement is enhanced further due to the presence of exceptional points. Moreover, the time evolution of quantum entanglement and quantum discord reveals that the system transitions from the unbroken PT-symmetric region to the broken region as the imaginary magnetic field increases. In this process, the periodic oscillatory patterns of quantum correlations change to a monotonically increasing behavior, eventually converging to a steady-state value. Our results provide a theoretical basis for using imaginary magnetic fields for controlling quantum correlations and offer a strategy for achieving maximally entangled states in non-Hermitian spin chain systems.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10773-025-05952-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
引用次数: 0
Density Fluctuations for Squeezed Number State and Coherent Squeezed Number State in Flat FRW Universe 平坦FRW宇宙中压缩数态和相干压缩数态的密度涨落
IF 1.3 4区 物理与天体物理
International Journal of Theoretical Physics Pub Date : 2025-03-24 DOI: 10.1007/s10773-025-05948-0
Dhwani Gangal, Sudhava Yadav, K. K. Venkataratnam
{"title":"Density Fluctuations for Squeezed Number State and Coherent Squeezed Number State in Flat FRW Universe","authors":"Dhwani Gangal,&nbsp;Sudhava Yadav,&nbsp;K. K. Venkataratnam","doi":"10.1007/s10773-025-05948-0","DOIUrl":"10.1007/s10773-025-05948-0","url":null,"abstract":"<div><p>We study the density fluctuations for Coherent Squeezed Number State (CSNS) and Squeezed Number States (SNS) formalism in the Semiclassical theory of gravity in a flat FRW universe. We used the Number state evolution of the oscillatory phase of inflation for coherent squeezed number state and squeezed number state formalisms. We analyzed that density fluctuations for SNS depend upon squeezing parameter and number state while for CSNS density fluctuations depend upon squeezing parameter, number state, and coherent state parameter. These parameters play an important role in the quantum consideration of SNS and CSNS. The results of the analysis show that an increase in density fluctuations for both SNS and CSNS demonstrates the quantum behavior of SCEE as well as the production of various kinds of particles in these states.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676332","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}
引用次数: 0
Quasi-stationary Evolution of Cubic-quintic NLSE Drop-like Solitons in DNA-protein Systems dna -蛋白质系统中三五次NLSE滴状孤子的准平稳进化
IF 1.3 4区 物理与天体物理
International Journal of Theoretical Physics Pub Date : 2025-03-22 DOI: 10.1007/s10773-025-05955-1
O. Pavón-Torres, J. R. Collantes-Collantes, M. A. Agüero-Granados
{"title":"Quasi-stationary Evolution of Cubic-quintic NLSE Drop-like Solitons in DNA-protein Systems","authors":"O. Pavón-Torres,&nbsp;J. R. Collantes-Collantes,&nbsp;M. A. Agüero-Granados","doi":"10.1007/s10773-025-05955-1","DOIUrl":"10.1007/s10773-025-05955-1","url":null,"abstract":"<div><p>Nonlinear molecular excitations in DNA have traditionally been studied within the framework of the nonlinear Schrödinger equation (NLSE). An alternative approach is based on the plane-base rotator model and <i>SU</i>(2)/<i>U</i>(1) generalized spin coherent states, which leads to a cubic-quintic NLSE. Higher-order nonlinearities are particularly useful for modelling complex interactions, such as those in DNA-protein systems, where multiple competing forces play a significant role. Additionally, the surrounding viscous medium introduces dissipative forces that influence the propagation of molecular excitations, resulting in energy dissipation and damping effects. These damping effects are modelled using the quasi-stationary method, which describes the system’s near-equilibrium behaviour. In this work, we analyse the evolution of nonlinear molecular excitations in DNA-protein systems, accounting for damping effects, and discuss potential applications to the transcription process.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667991","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}
引用次数: 0
Inertia Sets of Three-qubit Entanglement Witnesses 三量子位纠缠见证人的惯性集
IF 1.3 4区 物理与天体物理
International Journal of Theoretical Physics Pub Date : 2025-03-22 DOI: 10.1007/s10773-025-05956-0
Qianying Yu, Lin Chen, Mengfan Liang
{"title":"Inertia Sets of Three-qubit Entanglement Witnesses","authors":"Qianying Yu,&nbsp;Lin Chen,&nbsp;Mengfan Liang","doi":"10.1007/s10773-025-05956-0","DOIUrl":"10.1007/s10773-025-05956-0","url":null,"abstract":"<div><p>Mutiqubit entanglement witnesses are essential in the verification of quantum entanglement of distributed systems. To characterize such witnesses, we investigate the inertia set of three partial transposed matrices of three-qubit entangled states, which are not positive semidefinite. Theoretically, there are totally 165 elements in the set, and we show some of them by constructing exactly their expressions. Our method relies on both theoretical analysis and program for numerical computing. We also apply our results to describe some physical systems from flavor neutrino systems.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667992","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}
引用次数: 0
Two Families of Optimal Quantum Locally Recoverable Codes 最优量子局部可恢复代码的两个系列
IF 1.3 4区 物理与天体物理
International Journal of Theoretical Physics Pub Date : 2025-03-21 DOI: 10.1007/s10773-025-05943-5
Dengcheng Xie, Shixin Zhu, Zhonghua Sun
{"title":"Two Families of Optimal Quantum Locally Recoverable Codes","authors":"Dengcheng Xie,&nbsp;Shixin Zhu,&nbsp;Zhonghua Sun","doi":"10.1007/s10773-025-05943-5","DOIUrl":"10.1007/s10773-025-05943-5","url":null,"abstract":"<div><p>Classical locally recoverable codes (classical LRCs) have wide application in large-scale distributed storage systems due to their efficiency in the recovery of localized errors. In order to satisfy the quest for quantum data storage, quantum locally recoverable codes (qLRCs) have been proposed for their relevant and prospective application. Firstly, two families of classical LRCs from subfields and cyclic groups of finite fields are constructed and their duals are proved to be dual-containing. Then two families of optimal qLRCs with regard to the quantum Singleton-like bound on qLRCs are deduced.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668384","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}
引用次数: 0
Is The Internal Entropy of F(R)-Gravity Really An Entropy? F(R)-重力的内部熵真的是熵吗？
IF 1.3 4区 物理与天体物理
International Journal of Theoretical Physics Pub Date : 2025-03-21 DOI: 10.1007/s10773-025-05957-z
Bohuslav Matouš
{"title":"Is The Internal Entropy of F(R)-Gravity Really An Entropy?","authors":"Bohuslav Matouš","doi":"10.1007/s10773-025-05957-z","DOIUrl":"10.1007/s10773-025-05957-z","url":null,"abstract":"<div><p>This paper connects two methods for finding the functional of entropy in <i>F</i>(<i>R</i>)-Gravity: Padmanabhan’s and Hammad’s. The resulting approach is simple to follow and yields the expected entropy functional. This functional can be separated into two parts. The part unknown in General Relativity is identified with internally developed entropy. This paper points on incompatibility between the internal entropy found from the entropy functional and the entropy found using conventional approach from equations of motion.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668356","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}
引用次数: 0
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