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The electroweak monopole–antimonopole pair in the standard model Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-02-28 Dan Zhu, Khai-Ming Wong, Guo-Quan Wong
We present the first numerical solution that corresponds to a pair of Cho–Maison monopoles and antimonopoles (MAPs) in the SU(2) × U(1) Weinberg–Salam (WS) theory. The monopoles are finitely separated, while each pole carries a magnetic charge ±4π/e. The positive pole is situated in the upper hemisphere, whereas the negative pole is in the lower hemisphere. The Cho–Maison MAP is investigated for a
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Thermodynamic geometry of the RN-AdS black hole and non-local observables Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-02-12 Chao Wang, Bin Wu, Zhen-Ming Xu, Wen-Li Yang
This paper studies the thermodynamic geometry of the Reissner–Nordström-anti-de Sitter (RN-AdS) black hole via detection of the non-local observables in the dual field theory, including the entanglement entropy and equal-time two-point correlation function. With the dimensional analysis, we construct the principle of corresponding states of black hole thermodynamics. As a result, our findings can be
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Enhanced quantum resources via two distant atom-cavity systems under the influence of atomic dissipation Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-02-09 M Setodeh Kheirabady, M K Tavassoly, M Rafeie, E Ghasemian
Quantum resources such as entanglement and coherence are the holy grail for modern quantum technologies. Although the unwanted environmental effects tackle quantum information processing tasks, suprisingly these key quantum resources may be protected and even enhanced by the implementation of some special hybrid open quantum systems. Here, we aim to show how a dissipative atom-cavity-system can be
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Phase diagram of muonium hydride: the significant effect of dimensionality Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-02-09 Jieru Hu, Massimo Boninsegni
We carry out a theoretical investigation of the low-temperature phase diagram of muonium hydride in two dimensions, using numerical simulations. It is shown that the phase diagram of this substance is qualitatively different in two and three dimensions. Specifically, while in three dimensions it is essentially identical to that of parahydrogen, i.e., only displaying a single (crystalline) phase. In
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Non-static plane symmetric perfect fluid solutions and Killing symmetries in f(R, T) gravity Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-02-09 Preeti Dalal, Karanjeet Singh, Sachin Kumar
In this paper, the non-static solutions for perfect fluid distribution with plane symmetry in f(R, T) gravitational theory are obtained. Firstly, using the Lie symmetries, symmetry reductions are performed for considered vector fields to reduce the number of independent variables. Then, corresponding to each reduction, exact solutions are obtained. Killing vectors lead to different conserved quantities
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Black hole evaporation and its remnants with the generalized uncertainty principle including a linear term Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-02-09 Bo Yu, Zheng-wen Long
In recent years, researchers have investigated the evaporation of Schwarzschild black holes using various forms of the generalized uncertainty principle (GUP), metric quantum correction, and non-commutative geometry, respectively. However, there are differences between the GUP correction and the other two methods in terms of describing the later stages of black hole evaporation. Furthermore, some studies
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Revisiting the island of hexadecapole-deformation nuclei in the A ≈ 150 mass region: focusing on the model application to nuclear shapes and masses Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-02-07 Xiao-Yang Wei, Hua-Lei Wang, Zhen-Zhen Zhang, Min-Liang Liu
Based on the potential-energy-surface calculation, the impact of different deformation degrees of freedom on a single-particle structure and binding energies in nuclei around 152Nd, located on one of the hexadecapole-deformation islands, is analyzed in a multi-dimensional deformation space. Various energy maps, curves and tables are presented to indicate nuclear properties. The calculated equilibrium
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Correlation between mechano-electronic features and scattering rates using deformation potential theory Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-02-07 Meryem Ziati, Sanaa Lahlali, Hamid Ez-Zahraouy
This research paper provides valuable insight into the electronic, mechanical and transport properties of the Sr2RuO2F2 compound. The study shows that the Sr2RuO4 compound exhibits a metallic ground state and that the energy gap widens with oxygen substitution with fluorine. The concept of absolute deformation potential and its correlation with band energies and strains is explained using deformation
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Integrability and solutions of a nonsymmetric discrete Korteweg-de Vries equation Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-02-07 Maebel Mesfun, Da-jun Zhang, Song-lin Zhao
In this paper, we present Lax pairs and solutions for a nonsymmetric lattice equation, which is a torqued version of the lattice potential Korteweg-de Vries equation. This nonsymmetric equation is special in the sense that it contains only one spacing parameter but consists of two consistent cubes with other integrable lattice equations. Using such a multidimensionally consistent property we are able
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Physical informed memory networks for solving PDEs: implementation and applications Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-02-07 Jiuyun Sun, Huanhe Dong, Yong Fang
With the advent of physics informed neural networks (PINNs), deep learning has gained interest for solving nonlinear partial differential equations (PDEs) in recent years. In this paper, physics informed memory networks (PIMNs) are proposed as a new approach to solving PDEs by using physical laws and dynamic behavior of PDEs. Unlike the fully connected structure of the PINNs, the PIMNs construct the
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Consequences of Rényi entropy on the thermal geometries and Hawking evaporation of topological dyonic dilaton black hole Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-02-05 Muhammad Yasir, Xia Tiecheng, Muhammad Usman, Shahid Chaudhary
The thermodynamics of black holes (BHs) has had a profound impact on theoretical physics, providing insight into the nature of gravity, the quantum structure of spacetime and the fundamental laws governing the Universe. In this study, we investigate thermal geometries and Hawking evaporation of the recently proposed topological dyonic dilaton BH in anti-de Sitter (AdS) space. We consider Rényi entropy
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Exploring the shadow of a rotating charged ModMax black hole Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-02-05 Khurshid Karshiboev, Farruh Atamurotov, Ahmadjon Abdujabbarov, Ali Övgün, Anvar Reyimberganov
The research presented in this paper discusses the impact that the parameters of charge (Q) and screening factor (γ) have on properties of the horizon and silhouette of rotating charged ModMax black holes which were reviewed in [Eur. Phys. J. C (2022) 82:1155] recently, building upon previous findings in the field. Furthermore, the study explores the behavior of null geodesics, which can help us better
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Finite dimensional irreducible representations of Lie superalgebra D (2, 1; α) Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-02-01 Xi Chen, Wen-Li Yang, Xiang-Mao Ding, Yao-Zhong Zhang
This paper focuses on the finite dimensional irreducible representations of Lie superalgebra D(2, 1; α). We explicitly construct the finite dimensional representations of the superalgebra D(2, 1; α) by using the shift operator and differential operator representations. Unlike ordinary Lie algebra representation, there are typical and atypical representations for most superalgebras. Therefore, its typical
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The modeling non-sequential double ionization of helium atom under high-intensity femtosecond laser pulses with shielding charge approximation Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-01-31 Marjan Zakavi, Mohammad Sabaeian
In this study, we successfully extracted the ‘knee structure’ for non-sequential double ionization (NSDI) in the helium atom. To achieve this, for the first time, we solved the time-dependent Schrödinger equation in three dimensions for the helium atom, utilizing the shielding charge approximation. Our findings corroborate prior observations by Wang et al [Wang and Eberly, Phys. Rev. Lett. 105, 083001
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Conservation laws, Lie symmetries, self adjointness, and soliton solutions for the Selkov–Schnakenberg system Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-01-31 Kashif Ali, Aly R Seadawy, Syed T R Rizvi, Noor Aziz
In this article, we explore the famous Selkov–Schnakenberg (SS) system of coupled nonlinear partial differential equations (PDEs) for Lie symmetry analysis, self-adjointness, and conservation laws. Moreover, miscellaneous soliton solutions like dark, bright, periodic, rational, Jacobian elliptic function, Weierstrass elliptic function, and hyperbolic solutions of the SS system will be achieved by a
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Conformally symmetric wormhole solutions supported by non-commutative geometry in f(Q,T) gravity Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-01-31 Chaitra Chooda Chalavadi, V Venkatesha, N S Kavya, S V Divya Rashmi
This paper investigates wormhole solutions within the framework of extended symmetric teleparallel gravity, incorporating non-commutative geometry, and conformal symmetries. To achieve this, we examine the linear wormhole model with anisotropic fluid under Gaussian and Lorentzian distributions. The primary objective is to derive wormhole solutions while considering the influence of the shape function
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The size effect and analogous boundary states in a circular non-Hermitian chain Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-01-31 Xin-Yu Ma, Yi-Han Guan, Qiao-Nan Li, Ai-Lei He, Lu Qi
We investigate the size effect and boundary states based on a circular non-Hermitian chain under the nonreciprocal intra-cell coupling and inter-cell coupling regimes. We find that the circular non-Hermitian chain exhibits an even–odd effect on the unit cell corresponding to a large chain, which is different from the open non-Hermitian chain only exhibiting the same effect for a small chain. Moreover
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New lump solutions and several interaction solutions and their dynamics of a generalized (3+1)-dimensional nonlinear differential equation Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-01-26 Yexuan Feng, Zhonglong Zhao
In this paper, we mainly focus on proving the existence of lump solutions to a generalized (3+1)-dimensional nonlinear differential equation. Hirota’s bilinear method and a quadratic function method are employed to derive the lump solutions localized in the whole plane for a (3+1)-dimensional nonlinear differential equation. Three examples of such a nonlinear equation are presented to investigate the
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Accuracy of numerical relativity waveforms with respect to space-based gravitational wave detectors Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-01-23 Zun Wang, Junjie Zhao, Zhoujian Cao
As with the laser interferometer gravitational-wave observatory (LIGO), the matched filtering technique will be critical to the data analysis of gravitational wave detection by space-based detectors, including LISA, Taiji and Tianqin. Waveform templates are the basis for such matched filtering techniques. To construct ready-to-use waveform templates, numerical relativity waveforms are a starting point
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Enhancing force sensing in a squeezed optomechanical system with quantum non-demolition measurement Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-01-23 Shi-Lei Chao, Zi-Hao Li, Xin-You Lü
A theoretical scheme is proposed to enhance the sensitivity of force sensors with quantum non-demolition measurement (QND) in an optomechanical setup assisted by four-tone optical driving and an optical parametric amplifier (OPA). With the help of special drive, the system can be simplified as the typical type of QND for force sensing, so that the backaction noise can be evaded to surpass the standard
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Constraints on the primordial curvature power spectrum by pulsar timing array data: a polynomial parameterization approach Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-01-23 Qin Fei
The recent stochastic signal observed jointly by NANOGrav, parkes pulsar timing array, European pulsar timing array, and Chinese pulsar timing array can be accounted for by scalar-induced gravitational waves (SIGWs). The source of the SIGWs is from the primordial curvature perturbations, and the main contribution to the SIGWs is from the peak of the primordial curvature power spectrum. To effectively
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Electron vortex generations in photoionization of hydrogen atoms by circularly-polarized chirped attosecond pulses Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-01-23 Bingshuang Zhang, Xiaoyu Liu, Fengzheng Zhu, Liguang Jiao, Aihua Liu
By numerically solving the time-dependent Schrödinger equation and employing the analytical perturbative model, we investigated the chirp-induced electron vortex in the photoionization of hydrogen atoms by a pair of counter-rotating circularly polarized chirped attosecond extremely ultraviolet pulses. We demonstrated that single-photon ionization of hydrogen atoms generates photoelectron momentum distributions
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Ground state of Rydberg-dressed Bose gas confined in a toroidal trap Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-01-19 Lin-Xue Wang, Hong-Li Yang, Hui Liu, Si-Lin Chen, Ya-Jun Wang, Xiao-Fei Zhang
The experimental realization of Rydberg dressing technology in ultracold atomic systems provides another superior platform for studying novel states of matter and macroscopic quantum phenomena. In this work, based on the mean-field theory, we have investigated the ground-state phases of a two-component Bose–Einstein condensate with Rydberg interaction and confined in a toroidal trap. The effects of
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Quantum gate-assisted teleportation in noisy environments: robustness and fidelity improvement Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-01-19 Sajede Harraz, Jiaoyang Zhang, Shuang Cong
Quantum teleportation as the key strategy for quantum communication requires pure maximally shared entangled states among quantum nodes. In practice, quantum decoherence drastically degrades the shared entanglement during entanglement distribution, which is a serious challenge for the development of quantum networks. However, most of the decoherence control strategies proposed thus far are either resource-intensive
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The Dbar-dressing method for the (2+1)-dimensional Date–Jimbo–Kashiwara–Miwa equation Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-01-19 Shifei Sun, Biao Li
In this work, the (2+1)-dimensional Date–Jimbo–Kashiwara–Miwa (DJKM) equation is studied by means of the ∂¯ -dressing method. A new ∂¯ problem has been constructed by analyzing the characteristic function and the Green’s function of its Lax representation. Based on solving the ∂¯ equation and choosing the proper spectral transformation, the solution of the DJKM equation is constructed. Furthermore
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Time evolutions of scalar field perturbation in Schwarzschild de-Sitter black hole from Einstein-scalar–Gauss–Bonnet theory Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-01-19 Cheng Xu, Zhen-Hao Yang, Xiao-Mei Kuang, Rui-Hong Yue
The scalar-free black hole could be unstable against the scalar field perturbation when it is coupled to a Gauss–Bonnet (GB) invariant in a special form. It is known that the tachyonic instability in this scenario is triggered by the sufficiently strong GB coupling. In this paper, we focus on the time domain analysis of massive scalar field perturbation around the Schwarzschild de-Sitter black hole
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On limit fractional Volterra hierarchies Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-01-19 Lixiang Zhang, Chuanzhong Li
For the limit fractional Volterra (LFV) hierarchy, we construct the n-fold Darboux transformation and the soliton solutions. Furthermore, we extend the LFV hierarchy to the noncommutative LFV (NCLFV) hierarchy, and construct the Darboux transformation expressed by quasi determinant of the noncommutative version. Meanwhile, we establish the relationship between new and old solutions of the NCLFV hierarchy
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Soliton resolution and asymptotic stability of N-solutions for the defocusing Kundu–Eckhaus equation with nonzero boundary conditions Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-01-12 Engui Fan, Yanxi Zhang
In this paper, we address interesting soliton resolution, asymptotic stability of N-soliton solutions and the Painlevé asymptotics for the Kundu-Eckhaus (KE) equation with nonzero boundary conditions iqt+qxx−2(∣q∣2−1)q+4β2(∣q∣4−1)q+4iβ∣q∣2xq=0,q(x,0)=q0(x)∼±1,x→±∞. The key to proving these results is to establish the formulation of a Riemann-Hilbert (RH) problem associated with the above Cauchy problem
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Anisotropic quintessence compact star in f(T) gravity with Tolman–Kuchowicz metric potentials Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-01-12 Piyali Bhar, Farook Rahaman, Shyam Das, Somi Aktar, Abdelghani Errehymy
To obtain analytically relativistic quintessence anisotropic spherical solutions in the f(T) paradigm is the primary objective of this paper. To do this, the pressure anisotropy condition is imposed, and we employ a metric potential of the Tolman–Kuchowicz (TK) type. We also suppose that our current model incorporates a quintessence field characterized by a parameter ω q , in addition to the anisotropic
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Multiple-quantum-coherence dynamics of spin-1 Bose–Einstein condensate during quantum phase transitions Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-01-12 Fulin Deng, Peng Xu, Su Yi, Wenxian Zhang
Multiple quantum coherences are often employed to describe quantum many-body dynamics in nuclear spin systems and recently, to characterize quantum phase transitions in trapped ions. Here we investigate the multiple-quantum-coherence dynamics of a spin-1 Bose–Einstein condensate. By adjusting the quadratic Zeeman shift, the condensate exhibits three quantum phases. Our numerical results show that the
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Quantum nonlocality evolution for two entangled mesoscopic fields under decoherence Commun. Theor. Phys. (IF 3.1) Pub Date : 2024-01-12 Zhao-Song Tan, Shou-Bang Yang, Zhen-Biao Yang, Shi-Biao Zheng
Investigation of the nonlocality evolution of entangled mesoscopic fields under decoherence not only is important for understanding the quantum–classical transition, but also has relevance to quantum communication and quantum computation protocols based on continuous variables. According to previous formulations of Bell inequalities, the system loses nonlocal features far before the disappearance of
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A significantly enhanced magnetic moment due to an electric dipole moment Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-12-20 Zhening Fang, Jian-Hua Jiang, Haiping Fang
We demonstrate via first-principle calculations based on the density functional theory that the magnetic moment of a helium atom under a given magnetic field has a positive correlation with the electric dipole moment when an external electric field is applied to the system. Our calculation shows that the enhancement of the magnetic moment is significant due to the reduction of the triplet-singlet splitting
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The influence of a self-focused laser beam on the stimulated Raman scattering process in collisional plasma Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-12-20 Keshav Walia, Taranjot Singh
The influence of a self-focused beam on the stimulated Raman scattering (SRS) process in collisional plasma is explored. Here, collisional nonlinearity arises as a result of non-uniform heating, thereby causing carrier redistribution. The plasma density profile gets modified in a perpendicular direction to the main beam axis. This modified plasma density profile greatly affects the pump wave, electron
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Particle dynamics, black hole shadow and weak gravitational lensing in the f (Q) theory of gravity Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-12-20 Allah Ditta, Xia Tiecheng, Farruh Atamurotov, Ibrar Hussain, G Mustafa
We study the particle dynamics around a black hole (BH) in f(Q) gravity. First, we investigate the influence of the parameters of f(Q) gravity on the horizon structure of the BH, photon orbits and the radius of the innermost stable circular orbit (ISCO) of massive particles. We further study the effects of the parameters of f(Q) gravity on the shadow cast by the BH. Moreover, we consider weak gravitational
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Stable bulk nanobubbles can be regarded as gaseous analogues of microemulsions Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-12-20 Changsheng Chen, Hongguang Zhang, Xianren Zhang
In our previous work [2022 Phys. Chem. Chem. Phys. 24 9685], we used molecular dynamics simulations to show that bulk nanobubbles can be stabilized by forming a compressed amphiphile monolayer at bubble interfaces. This observation closely matches the origin of stability of microemulsions and inspired us to propose here that, in certain cases, stable bulk nanobubbles can be regarded as gaseous analogues
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Universal resources for quantum computing Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-12-20 Dong-Sheng Wang
Unravelling the source of quantum computing power has been a major goal in the field of quantum information science. In recent years, the quantum resource theory (QRT) has been established to characterize various quantum resources, yet their roles in quantum computing tasks still require investigation. The so-called universal quantum computing model (UQCM), e.g. the circuit model, has been the main
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Disassociation of a one-dimensional cold molecule via quantum scattering Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-12-20 Wen-Liang Li, Hai-Jing Song, Tie-Ling Song, D L Zhou
Motivated by the recent experimental developments in ultracold molecules and atoms, we propose a simple theoretical model to address the disassociation, reflection, and transmission probability of a one-dimensional cold molecule via quantum scattering. First, we show the Born approximation results in the weak interaction regime. Then, by employing the Lippmann–Schwinger equation, we give the numerical
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Heat engines of the Kerr-AdS black hole Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-12-20 Yi Zhong, Yun-Zhi Du
In this paper, we investigate three types of heat engines for the rotating Kerr-Anti de Sitter (Kerr-AdS) black hole. We first briefly review the thermodynamics and phase structure of the Kerr-AdS black hole and obtain the phase structure in the T–S chart. The thermal stability of Kerr-AdS black holes, along with their dependence on various parameters, is thoroughly examined. Then, by utilizing the
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Macroscopic squeezing in quasi-one-dimensional two-component Bose gases Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-12-18 Yaoqi Tian, Junqiao Pan, Tao Shi, Su Yi
We investigate the ground-state properties and the dynamics of quasi-one-dimensional quantum droplets of binary Bose condensates by employing the Gaussian state theory. We show that there exists three quantum phases for the ground states of the droplets, including a coherent state and two macroscopic squeezed states. The phase transition between two macroscopic squeezed states is of the third order;
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Square-root parametrization of dark energy in f(Q) cosmology Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-12-18 M Koussour, N Myrzakulov, Alnadhief H A Alfedeel, E I Hassan, D Sofuoğlu, Safa M Mirgani
This paper is a parametrization of the equation of state (EoS) parameter of dark energy (DE), which is parameterized using square-root (SR) form i.e. ωSR=ω0+ω1zz2+1 , where ω 0 and ω 1 are free constants. This parametrization is examined in the context of the recently suggested f(Q) gravity theory as an alternative to general relativity (GR), in which gravitational effects are attributed to the non-metricity
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Novel soliton molecule solutions for the second extend (3+1)-dimensional Jimbo-Miwa equation in fluid mechanics Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-12-18 Hongcai Ma, Xiaoyu Chen, Aiping Deng
The main aim of this paper is to investigate the different types of soliton molecule solutions of the second extend (3+1)-dimensional Jimbo-Miwa equation in a fluid. Four different localized waves: line solitons, breather waves, lump solutions and resonance Y-type solutions are obtained by the Hirota bilinear method directly. Furthermore, the molecule solutions consisting of only line waves, breathers
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Algebro-geometrical orientifold and IR dualities Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-12-18 Federico Manzoni
Orientifold projections are an important ingredient in the geometrical engineering of Quantum Field Theory. However, an orientifold can break down the superconformal symmetry and no new superconformal fixed points are admitted (scenario II); nevertheless, in some cases, dubbed scenarios I and III orientifold, a new IR fixed point is achieved and, for scenario III examples, some still not fully understood
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Thin-shell wormholes and modified Chaplygin gas with relativistic corrections Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-11-23 M Z Bhatti, Z Yousaf, M Yousaf
In this paper, we analyze thin-shell wormholes from two identical copies of charged static cylindrically symmetric spacetimes using Visser’s ‘cut and paste’ approach under the influence of f(R, T) gravity Harko, Lobo, Nojiri, and Odintsov (2011, Phys. Rev. D 84, 024020). In this scenario, the modified Chaplygin gas supports the exotic matter in the shell which allows, one to examine the dynamics of
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Integrable nonlocal PT-symmetric generalized so(3,R) -mKdV equations Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-11-23 Shou-Ting Chen, Wen-Xiu Ma
Based on a soliton hierarchy associated with so(3,R) , we construct two integrable nonlocal PT-symmetric generalized mKdV equations. The key step is to formulate two nonlocal reverse-spacetime similarity transformations for the involved spectral matrix, and therefore, integrable nonlocal complex and real reverse-spacetime generalized so(3,R) -mKdV equations of fifth-order are presented. The resulting
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Energy in critical collapse Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-11-23 Yu Hu, Jun-Qi Guo, Junbin Li, Cheng-Gang Shao, Hongsheng Zhang
We study the energy issue in critical collapse. It is found that in critical collapse, the contribution from the material energy is greater than that from the gravitational energy. The quantity m/r plays an important role in identifying the formation of an apparent horizon in gravitational collapse, where m is the Misner–Sharp mass and r is the areal radius. We observe that in critical collapse, the
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Fractal dynamics and computational analysis of local fractional Poisson equations arising in electrostatics Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-11-23 Jagdev Singh, Hassan Kamil Jassim, Devendra Kumar, Ved Prakash Dubey
In this paper, the local fractional natural decomposition method (LFNDM) is used for solving a local fractional Poisson equation. The local fractional Poisson equation plays a significant role in the study of a potential field due to a fixed electric charge or mass density distribution. Numerical examples with computer simulations are presented in this paper. The obtained results show that LFNDM is
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Prompt photon production in proton–nucleus collisions at LHC: a comparison among color dipole models* * Supported by the National Natural Science Foundation of China (Grant No. U1832120), the Natural Science Foundation for Outstanding Young Scholars of Hebei Province (Grant No. A2020210012), the S&T Program of Hebei (Grant No. 236Z4601G), and the Scientific Research Foundation for the Introducing Returned Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-11-23 Hong-Min Wang, Yan-Zhao Wang, Yong-Han Xu, Xian-Jing Sun
The nuclear modification factor for prompt photon production in proton–nucleus collisions is investigated within color dipole formalism. By means of the Glauber–Gribov approach, the nuclear effects are studied in various rapidity bins with the evolution equation-based saturation models and the phenomenological dipole models. The theoretical results are compared with the experimental data provided by
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Propagation of chirped solitons on a cw background in a non-Kerr quintic medium with self-steepening effect Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-11-23 Abdesselam Bouguerra, Houria Triki, Chun Wei, Zhenbang Lu, Qin Zhou
We study the existence and stability of envelope solitons on a continuous-wave background in a non-Kerr quintic optical material exhibiting a self-steepening effect. Light propagation in such a nonlinear medium is governed by the Gerdjikov–Ivanov equation. We find that the system supports a variety of localized waveforms exhibiting an important frequency chirping property which makes them potentially
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Asymptotic analysis of multi-valley dark soliton solutions in defocusing coupled Hirota equations Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-11-10 Ziwei Jiang, Liming Ling
We construct uniform expressions of such dark soliton solutions encompassing both single-valley and double-valley dark solitons for the defocusing coupled Hirota equation with high-order nonlinear effects utilizing the uniform Darboux transformation, in addition to proposing a sufficient condition for the existence of the above dark soliton solutions. Furthermore, the asymptotic analysis we perform
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Theoretical investigations on a variable-coefficient generalized forced–perturbed Korteweg–de Vries–Burgers model for a dilated artery, blood vessel or circulatory system with experimental support Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-11-10 Xin-Yi Gao, Yong-Jiang Guo, Wen-Rui Shan
Recent theoretical physics efforts have been focused on the probes for nonlinear pulse waves in, for example, variable-radius arteries. With respect to the nonlinear waves in an artery full of blood with certain aneurysm, pulses in a blood vessel, or features in a circulatory system, this paper symbolically computes out an auto-Bäcklund transformation via a noncharacteristic movable singular manifold
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Study of the gluonic quartic gauge couplings at muon colliders Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-11-10 Ji-Chong Yang, Yu-Chen Guo, Yi-Fei Dong
The potential of muon colliders opens up new possibilities for the exploration of new physics beyond the Standard Model. It is worthwhile to investigate whether muon colliders are suitable for studying gluonic quartic gauge couplings (gQGCs), which can be contributed by dimension-8 operators in the framework of the Standard Model effective field theory, and are intensively studied recently. In this
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Data-driven fusion and fission solutions in the Hirota–Satsuma–Ito equation via the physics-informed neural networks method Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-11-10 Jianlong Sun, Kaijie Xing, Hongli An
Fusion and fission are two important phenomena that have been experimentally observed in many real physical models. In this paper, we investigate the two phenomena in the (2+1)-dimensional Hirota–Satsuma–Ito equation via the physics-informed neural networks (PINN) method. By choosing suitable physically constrained initial boundary conditions, the data-driven fusion and fission solutions are obtained
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Graphical representations and worm algorithms for the O(N) spin model Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-11-10 Longxiang Liu, Lei Zhang, Xiaojun Tan, Youjin Deng
We present a family of graphical representations for the O(N) spin model, where N ≥ 1 represents the spin dimension, and N = 1, 2, 3 corresponds to the Ising, XY and Heisenberg models, respectively. With an integer parameter 0 ≤ ℓ ≤ N/2, each configuration is the coupling of ℓ copies of subgraphs consisting of directed flows and N − 2ℓ copies of subgraphs constructed by undirected loops, which we call
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The residual symmetry, Bäcklund transformations, CRE integrability and interaction solutions: (2+1)-dimensional Chaffee–Infante equation Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-11-10 Nursena Günhan Ay, Emrullah Yaşar
In this paper, we consider the (2+1)-dimensional Chaffee–Infante equation, which occurs in the fields of fluid dynamics, high-energy physics, electronic science etc. We build Bäcklund transformations and residual symmetries in nonlocal structure using the Painlevé truncated expansion approach. We use a prolonged system to localize these symmetries and establish the associated one-parameter Lie transformation
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Flocking and clustering in mixtures of self-propelled particles with or without active reorientation Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-11-10 Lu Chen, Z C Tu
We study phase behaviors of mixtures comprising active particles with and without active reorientation by varying mixing ratios. We observe that the order parameter characterizing flocking in the steady state exhibits a linear decrease with an increase in mixing ratio. While the order parameter characterizing clustering in the steady state presents a sharp leap as the mixing ratio increases. Particularly
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∂¯ -dressing method for the complex modified KdV equation Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-11-10 Shuxin Yang, Biao Li
The dressing method based on the 2 × 2 matrix ∂¯ -problem is generalized to study the complex modified KdV equation (cmKdV). Through two linear constraint equations, the spatial and time spectral problems related to the cmKdV equation are derived. The gauge equivalence between the cmKdV equation and the Heisenberg chain equation is obtained. Using a recursive operator, a hierarchy of cmKdV with source
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Theoretical aspects of holographic dark energy Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-10-13 Shuang Wang, Miao Li
We review the theoretical aspects of holographic dark energy (HDE) in this paper. Making use of the holographic principle (HP) and the dimensional analysis, we derive the core formula of the original HDE (OHDE) model, in which the future event horizon is chosen as the characteristic length scale. Then, we describe the basic properties and the corresponding theoretical studies of the OHDE model, as
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Thick accretion disk configurations around a compact object in the brane-world scenario Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-09-29 Yunzhu Wei, Songbai Chen, Jiliang Jing
We have studied the equipotential surfaces of a thick accretion disk around a Casadio–Fabbri–Mazzacurati compact object in the brane-world scenario, which possesses a mass parameter together with a parameterized post-Newtonian (PPN) parameter. With the increase in the PPN parameter, the size of the thick accretion disk decreases, but the corresponding Roche lobe size increases. Thus, the larger PPN
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Insight into the magnetic behavior and magnetocaloric effect of a borophene monolayer Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-09-29 Ying An, Wei Wang, Bo-wen Xiao, Si-yu Huang, Zhen-yao Xu
The successful discovery of borophene has opened a new door for the development of 2D materials. Due to its excellent chemical, electronic and thermal properties, borophene has shown considerable potential in supercapacitors, hydrogen storage and batteries. In this paper, the thermodynamic characteristics and magnetocaloric effect of borophene are specifically studied using the Monte Carlo method.
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Vibrational resonance in a multistable system with position-dependent mass Commun. Theor. Phys. (IF 3.1) Pub Date : 2023-09-29 T O Roy-Layinde, K A Omoteso, O T Kolebaje, F O Ogunmefun, R A Fasasi, J A Laoye, U E Vincent
The occurrence of vibrational resonance (VR) in a dual-frequency-driven multistable system with a spatially varying mass modelling particle with position-dependent mass (PDM) and evolving in a one-dimensional symmetric periodic potential has been investigated and reported in this paper. We numerically compute and analyze the response amplitude, the effects of the PDM parameters (m 0, a) on the potential