Communications in Theoretical Physics最新文献

{"title":"Constraining the variable generalized Chaplygin gas model in matter creation cosmology","authors":"Yogesh Bhardwaj, C P Singh","doi":"10.1088/1572-9494/ad58c2","DOIUrl":"https://doi.org/10.1088/1572-9494/ad58c2","url":null,"abstract":"We explore the variable generalized Chaplygin gas (VGCG) model in the theory of matter creation cosmology within the framework of a spatially homogeneous and isotropic flat Friedmann—Lemaître—Robertson—Walker space-time. Matter creation cosmology is based on reinterpretation of the energy–momentum tensor in Einstein’s field equations. This creation corresponds to an irreversible energy flow from the gravitational field to the created matter constituents. The variable Chaplygin gas (VCG) is also studied as a particular solution. We use the Markov chain Monte Carlo method to constrain the free parameters of three models, namely, Lambda-Cold-Dark matter (ΛCDM), VGCG and VCG models with and without matter creation from the latest observational data from baryon acoustic oscillations, cosmic chronometer, type Ia supernovae (Pantheon) including gamma-ray bursts, quasars and the local measurement of <italic toggle=\"yes\">H</italic>\u0000₀ from R21 data. Two different combinations of dataset provide a fairly tight constraint on the parameters of the ΛCDM, VGCG and VCG models. The present values of various cosmological parameters are obtained, which are very close to the ΛCDM model. Furthermore, we perform stability analysis, Bayesian evidence analysis and information criteria analysis for these models through studying the sound speed, Bayes factor, and Akaike information criteria (AIC) and Bayesian information criteria (BIC) selection criteria. The values of sound speed for VGCG and VCG models shows that both the models are stable. According to AIC, it is observed that VGCG and VCG models with matter creation are supported considerably less by current observations, while BIC shows that these models are not favoured by observational data.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":"10 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142190354","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}

{"title":"Quantum multicast based on joint remote state preparation","authors":"Zhihua Zhang, Beining Shen, Hanchen Zhang, Zhipeng Qiu","doi":"10.1088/1572-9494/ad5ae7","DOIUrl":"https://doi.org/10.1088/1572-9494/ad5ae7","url":null,"abstract":"Effective propagation of information among multiple users is the purpose of realizing large-scale quantum communication networks. In this paper, multicast protocols for any single, two and three qubits with real amplitude and complex phase information are presented. They were realized using a composite of Greenberger–Horne–Zeilinger states as shared channels. Joint remote state preparation was the main method for completing quantum multicast. At the same time, quantum state tomography of the schemes was carried out on the IBM Quantum platform. The obtained states were compared with the target states by fidelity. The analysis of communication efficiency and noise effects shows that our protocol has advantages in the case of complex coefficients.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":"10 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142190355","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}

{"title":"An effective gauge field theory of the nucleon interactions","authors":"Eduard Boos","doi":"10.1088/1572-9494/ad5f85","DOIUrl":"https://doi.org/10.1088/1572-9494/ad5f85","url":null,"abstract":"We discuss the possibility of constructing an effective gauge field theory of the nucleon interactions based on the ideas of isotopic invariance as well as hypercharge invariance as a local gauge symmetry and spontaneous breaking of this symmetry. The constructed effective field theory predicts the structure of interactions of protons and neutrons with <italic toggle=\"yes\">ρ</italic>- and <italic toggle=\"yes\">σ</italic>-mesons, and with pi-mesons and photons, as well as interactions of these particles with each other. The Lagrangian of the theory consists of several parts involving dimension 4 and 5 gauge invariant operators. Feynman rules for physical degrees of freedom that follow on from the Lagrangian define the structure of diagrams for one-boson exchanges between nucleons, predicting the internucleon one-boson-exchange potential as well as nucleon scattering amplitudes. The range of applicability of the effective theory is discussed and estimates are made of the resulting coupling constants. The theory predicts the mass of the neutral <italic toggle=\"yes\">ρ</italic>\u0000⁰-meson to be about 1 MeV larger than the mass of the charged mesons <italic toggle=\"yes\">ρ</italic>\u0000^±. The vector <italic toggle=\"yes\">ω</italic>-meson, which is a sterile particle with respect to the considered gauge group <italic toggle=\"yes\">SU</italic>\u0000_{\u0000<italic toggle=\"yes\">I</italic>\u0000}(2) × <italic toggle=\"yes\">U</italic>\u0000_{\u0000<italic toggle=\"yes\">Y</italic>\u0000}(1), can be added to the scheme via a gauge-invariant operator of dimension 5, as shown in the appendix.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":"39 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224860","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}

{"title":"Cauchy matrix approach for H1 a equation in the torqued Adler–Bobenko–Suris lattice list","authors":"Jing Wang, Song-lin Zhao, Shoufeng Shen","doi":"10.1088/1572-9494/ad5991","DOIUrl":"https://doi.org/10.1088/1572-9494/ad5991","url":null,"abstract":"As a torqued version of the lattice potential Korteweg–de Vries equation, the H1^{\u0000<italic toggle=\"yes\">a</italic>\u0000} is an integrable nonsymmetric lattice equation with only one spacing parameter. In this paper, we present the Cauchy matrix scheme for this equation. Soliton solutions, Jordan-block solutions and soliton-Jordan-block mixed solutions are constructed by solving the determining equation set. All the obtained solutions have jumping property between constant values for fixed <italic toggle=\"yes\">n</italic> and demonstrate periodic structure.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":"76 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141863923","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}

{"title":"New interaction solutions of the (2+1)-dimensional Nizhnik–Novikov–Veselov-type system and fusion phenomena","authors":"Guo-Hua Wang, Ji Lin, Shou-Feng Shen","doi":"10.1088/1572-9494/ad595c","DOIUrl":"https://doi.org/10.1088/1572-9494/ad595c","url":null,"abstract":"By means of the multilinear variable separation (MLVS) approach, new interaction solutions with low-dimensional arbitrary functions of the (2+1)-dimensional Nizhnik–Novikov–Veselov-type system are constructed. Four-dromion structure, ring-parabolic soliton structure and corresponding fusion phenomena for the physical quantity <inline-formula>\u0000<tex-math>\u0000<?CDATA ${U}=lambda {(mathrm{ln}f)}_{{xy}}$?>\u0000</tex-math>\u0000<mml:math overflow=\"scroll\"><mml:mi mathvariant=\"italic\">U</mml:mi><mml:mo>=</mml:mo><mml:mi>λ</mml:mi><mml:msub><mml:mrow><mml:mo stretchy=\"false\">(</mml:mo><mml:mi>ln</mml:mi><mml:mi>f</mml:mi><mml:mo stretchy=\"false\">)</mml:mo></mml:mrow><mml:mrow><mml:mi mathvariant=\"italic\">xy</mml:mi></mml:mrow></mml:msub></mml:math>\u0000<inline-graphic xlink:href=\"ctpad595cieqn1.gif\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> are revealed for the first time. This MLVS approach can also be used to deal with the (2+1)-dimensional Sasa–Satsuma system.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":"37 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141863922","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}

{"title":"Flavor mixing and solution structures in Dyson–Schwinger equations for a two-flavor system","authors":"Xue-ao Chao, Yu-xin Liu","doi":"10.1088/1572-9494/ad5272","DOIUrl":"https://doi.org/10.1088/1572-9494/ad5272","url":null,"abstract":"We solved the Dyson–Schwinger (DS) equations for a two-flavor system with symmetry to study its flavor mixing effects. Initially, we employed the point interaction model and bare vertex approximation to reveal the structure of the solutions. Using the point interaction model, the DS equations can be solved analytically, and we found that these solutions can be classified into three groups, each forming an ellipse. These solutions exhibit SO(2) symmetry, while the original SU(2) symmetry at the Lagrangian level is dynamically broken to SO(2), corresponding to the emergence of flavor mixing effects. However, this flavor mixing effect does not manifest in the final physical state. By utilizing the system’s SO(2) symmetry, we can diagonalize the propagators of the DS equations, eliminating the flavor mixing effect but causing the originally degenerate masses at the Lagrangian level to split. These mass eigenstates have identical quantum numbers but different masses. If we can correspond these to quark particles of different generations, we can explain why the three generations of quarks have different masses and obtain the corresponding quark mass spectrum. Finally, we provide the corresponding numerical results using a more realistic interaction model.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":"41 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141863921","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}

{"title":"The possible KK¯* and DD¯* bound and resonance states by solving the Schrodinger equation","authors":"Bao-Xi Sun, Qin-Qin Cao, Ying-Tai Sun","doi":"10.1088/1572-9494/ad51df","DOIUrl":"https://doi.org/10.1088/1572-9494/ad51df","url":null,"abstract":"The Schrodinger equation with a Yukawa type of potential is solved analytically. When different boundary conditions are taken into account, a series of solutions are indicated as a Bessel function, the first kind of Hankel function and the second kind of Hankel function, respectively. Subsequently, the scattering processes of <inline-formula>\u0000<tex-math>\u0000<?CDATA $K{bar{K}}^{* }$?>\u0000</tex-math>\u0000<mml:math overflow=\"scroll\"><mml:mi>K</mml:mi><mml:msup><mml:mrow><mml:mover accent=\"true\"><mml:mrow><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mo>¯</mml:mo></mml:mrow></mml:mover></mml:mrow><mml:mrow><mml:mo>*</mml:mo></mml:mrow></mml:msup></mml:math>\u0000<inline-graphic xlink:href=\"ctpad51dfieqn5.gif\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> and <inline-formula>\u0000<tex-math>\u0000<?CDATA $D{bar{D}}^{* }$?>\u0000</tex-math>\u0000<mml:math overflow=\"scroll\"><mml:mi>D</mml:mi><mml:msup><mml:mrow><mml:mover accent=\"true\"><mml:mrow><mml:mi>D</mml:mi></mml:mrow><mml:mrow><mml:mo>¯</mml:mo></mml:mrow></mml:mover></mml:mrow><mml:mrow><mml:mo>*</mml:mo></mml:mrow></mml:msup></mml:math>\u0000<inline-graphic xlink:href=\"ctpad51dfieqn6.gif\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> are investigated. In the <inline-formula>\u0000<tex-math>\u0000<?CDATA $K{bar{K}}^{* }$?>\u0000</tex-math>\u0000<mml:math overflow=\"scroll\"><mml:mi>K</mml:mi><mml:msup><mml:mrow><mml:mover accent=\"true\"><mml:mrow><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mo>¯</mml:mo></mml:mrow></mml:mover></mml:mrow><mml:mrow><mml:mo>*</mml:mo></mml:mrow></mml:msup></mml:math>\u0000<inline-graphic xlink:href=\"ctpad51dfieqn7.gif\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> sector, the <italic toggle=\"yes\">f</italic>\u0000₁(1285) particle is treated as a <inline-formula>\u0000<tex-math>\u0000<?CDATA $K{bar{K}}^{* }$?>\u0000</tex-math>\u0000<mml:math overflow=\"scroll\"><mml:mi>K</mml:mi><mml:msup><mml:mrow><mml:mover accent=\"true\"><mml:mrow><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mo>¯</mml:mo></mml:mrow></mml:mover></mml:mrow><mml:mrow><mml:mo>*</mml:mo></mml:mrow></mml:msup></mml:math>\u0000<inline-graphic xlink:href=\"ctpad51dfieqn8.gif\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> bound state, therefore, the coupling constant in the <inline-formula>\u0000<tex-math>\u0000<?CDATA $K{bar{K}}^{* }$?>\u0000</tex-math>\u0000<mml:math overflow=\"scroll\"><mml:mi>K</mml:mi><mml:msup><mml:mrow><mml:mover accent=\"true\"><mml:mrow><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mo>¯</mml:mo></mml:mrow></mml:mover></mml:mrow><mml:mrow><mml:mo>*</mml:mo></mml:mrow></mml:msup></mml:math>\u0000<inline-graphic xlink:href=\"ctpad51dfieqn9.gif\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> Yukawa potential can be fixed according to the binding energy of the <italic toggle=\"yes\">f</italic>\u0000₁(1285) particle. Consequently, a <inline-formula>\u0000<tex-math>\u0000<?CDATA $K{bar{K}}^{* }$?>\u0000</tex-math>\u0000<mml:math overflow=\"scroll\"><mml:mi>K</mml:mi><mml:msup><mml:mrow><mml:mover accent=\"true\"><mml:mrow><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mo>¯</mml:mo></mml:","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":"174 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141863920","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}

{"title":"Rotating effects on the photoionization cross-section of a 2D quantum ring","authors":"Carlos Magno O Pereira, Frankbelson dos S Azevedo, Luís Fernando C Pereira, Edilberto O Silva","doi":"10.1088/1572-9494/ad597c","DOIUrl":"https://doi.org/10.1088/1572-9494/ad597c","url":null,"abstract":"In this article, we investigate the nonrelativistic quantum motion of a charged particle within a rotating frame, taking into account the Aharonov–Bohm (AB) effect and a uniform magnetic field. Our analysis entails the derivation of the equation of motion and the corresponding radial equation to describe the system. Solving the resulting radial equation enables us to determine the eigenvalues and eigenfunctions, providing a clear expression for the energy levels. Furthermore, our numerical analysis highlights the substantial influence of rotation on both energy levels and optical properties. Specifically, we evaluate the photoionization cross-section with and without the effects of rotation. To elucidate the impact of rotation on the photoionization process of the system, we present graphics that offer an appealing visualization of the intrinsic nature of the physics involved.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":"28 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141863843","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}

{"title":"Energy exchange between charged relativistic fluids in f(T) gravity","authors":"Z Yousaf, U A Khokhar, Nasser Bin Turki, T Suzuki","doi":"10.1088/1572-9494/ad5b4d","DOIUrl":"https://doi.org/10.1088/1572-9494/ad5b4d","url":null,"abstract":"This study focuses on the effects of a polytropic fluid on a charged gravitational source within <italic toggle=\"yes\">f</italic>(<italic toggle=\"yes\">T</italic>) gravity, where <italic toggle=\"yes\">T</italic> is the torsion scalar. We investigate how the electromagnetic field affects the flow of energy in spherically symmetric and static celestial objects that contain relativistic fluids. By using the gravitational decoupling technique, we analyze the effects of polytropic fluid on the dynamics of the gravitational source, accompanied by the matching of the interior geometry with an exterior at the hypersurface Σ. Finally, with the help of the Tolman <inline-formula>\u0000<tex-math>\u0000<?CDATA ${mathbb{IV}}$?>\u0000</tex-math>\u0000<mml:math overflow=\"scroll\"><mml:mi mathvariant=\"double-struck\">IV</mml:mi></mml:math>\u0000<inline-graphic xlink:href=\"ctpad5b4dieqn1.gif\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> solution, we observe the conduct of energy conditions with the existence of charge using <italic toggle=\"yes\">f</italic>(<italic toggle=\"yes\">T</italic>) field equations and got the intended outcomes.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":"74 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141863852","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}

{"title":"Two-dimensional and absolutely entanglement-breaking subspaces","authors":"Jian Yan and Lin Chen","doi":"10.1088/1572-9494/ad43d2","DOIUrl":"https://doi.org/10.1088/1572-9494/ad43d2","url":null,"abstract":"Entanglement-breaking (EB) subspaces determine the additivity of entanglement of formation (EOF), which is a long-standing issue in quantum information. We explicitly construct the two-dimensional EB subspaces of any bipartite system, when system dimensions are equal, and we apply the subspaces to construct EB spaces of arbitrary dimensions. We also present partial construction when system dimensions are different. Then, we present the notion and properties of EB subspaces for some systems, and in particular the absolute EB subspaces. We construct some examples of absolute EB subspaces, as well as EB subspaces for some systems by using multiqubit Dicke states.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":"28 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141778463","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}