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Dark energy stars in the context of black holes — The physical profiles Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-24 Muhamad Ashraf Azman, Norhasliza Yusof, Hasan Abu Kassim, Juan Carlos Algaba Marcos
The dark energy star is a hypothetical model proposed as an alternative to address problems related to the structure of black holes (BHs), such as the presence of singularities. While dark energy star models have been previously explored, their application to BHs remains unexplored. This paper aims to investigate the concept of dark energy stars and compare their properties to BHs. The primary objective
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Atmospheric Neutrino octant from flavor symmetry Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-19 Paul H. Frampton, Claudio Corianò, Pietro Santorelli
The binary tetrahedral group (T′) has provided the most successful flavor symmetry in understanding simultaneously the three mixing angles both for quarks in the CKM matrix and for neutrinos in the PMNS matrix. One prediction, invariant under leptonic CP violation, relates the atmospheric and reactor neutrino mixings θ32 and θ13, respectively. We study sedulously this relation using the latest neutrino
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Einstein–Podolsky–Rosen steering paradox “2=1” for N qubits Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-19 Zhi-Jie Liu, Jie Zhou, Hui-Xian Meng, Xing-Yan Fan, Mi Xie, Fu-Lin Zhang, Jing-Ling Chen
Einstein–Podolsky–Rosen (EPR) paradox highlights the absence of a local realistic explanation for quantum mechanics, and shows the incompatibility of the local-hidden-state models with quantum theory. For N-qubit states, or more importantly, the N-qubit mixed states, we present the EPR steering paradox in the form of the contradictory equality “2=1”. We show that the contradiction holds for any N-qubit
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Tripartite quantum teleportation in de Sitter spacetime Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-19 Zhiming Huang, Xiangfu Zou, Haozhen Situ, Zhimin He, Lianghui Zhao, Yiyong Ye, Zhenbang Rong
In this paper, a tripartite quantum teleportation scheme in de Sitter vacuum is constructed. Then we investigate the influence of vacuum fluctuation, temperature and two-atom distance on performance of the tripartite quantum teleportation. It is found that fidelity drops fast with temperature and evolution time increasing. While temperature is low relatively, the influence of two-atom distance cannot
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Comments on oscillations in elastic scattering of hadrons Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-19 S. M. Troshin, N. E. Tyurin
The observed absence of the small-t oscillations in differential cross-section of the elastic scattering is considered as a consequence of the reflective scattering mode appearance at the highest energy of the LHC s=13TeV.
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Cosmic acceleration & deceleration with f(R,T) gravity Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-17 R. K. Mishra, Rahul Sharma
This study includes the cosmic evolution and the potential periodicity of the universe. It employs a periodic varying deceleration parameter (PVDP) within the framework of f(R,T) theory of gravity, with a specific focus on the Bianchi-II model. We explore the dynamic nature of the universe, with physical and geometrical properties within this theoretical framework. We have also analyzed the cosmographic
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Weak cosmic censorship conjecture by overspinning the Kerr–Newman–Kasuya black hole Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-17 Ayyesha K. Ahmed, Azad A. Siddiqui
We study the weak cosmic censorship conjecture by overspinning the Kerr–Newman–Kasuya black hole with test particle. We consider the geodesic equation of motion and find the certain conditions on the angular momentum of the black hole. We find the expression of δJmin and δJmax and then check whether the inequality satisfies or not. The results suggest that the Kerr–Newman–Kasuya black hole can be overspun
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Quantum thermodynamics of small systems: The anyonic otto engine Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-08 H. S. Mani, N. Ramadas, V. V. Sreedhar
Recent advances in applying thermodynamic ideas to quantum systems have raised the novel prospect of using non-thermal, non-classical sources of energy, of purely quantum origin, like quantum statistics, to extract mechanical work in macroscopic quantum systems like Bose–Einstein condensates. On the other hand, thermodynamic ideas have also been applied to small systems like single molecules and quantum
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Algebraic cluster model calculations for shape phase transitions of boson-fermion systems Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-08 M. Ghapanvari, N. Amiri, M. A. Jafarizadeh, M. Seidi
The Algebraic Cluster Model (ACM) is an interacting boson model that gives the relative motion of the cluster configurations in which all vibrational and rotational degrees of freedom are present from the outset. We schemed a solvable extended transitional Hamiltonian based on affine SU(1,1) Lie algebra within the framework for two-, three- and four-body algebraic cluster models that explains both
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Anisotropic f(Q) gravity model with bulk viscosity Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-08 M. Koussour, S. H. Shekh, M. Bennai, N. Myrzakulov
This study investigates the dynamics of a spatially homogeneous and anisotropic LRS Bianchi type-I Universe with viscous fluid in the framework of f(Q) symmetric teleparallel gravity. We assume a linear form for f(Q) and introduce hypotheses regarding the relationship between the expansion and shear scalars, as well as the Hubble parameter and bulk viscous coefficient. The model is constrained using
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Statistical properties of the 𝒜κ<0 Weyl–Heisenberg algebra coherent states Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-08 M. Alaoui, E. Mouhaoui, B. Maroufi, M. Daoud
In this paper, we study the one-parameter κ-generalized oscillator algebra 𝒜κ (which includes the case of the standard Weyl–Heisenberg algebra). This algebra admits representations of finite-dimensional for negative values of the parameter κ. We construct the associated Perelomov like coherent states. We discuss their statistical properties. In particular, we derive the expressions of the Mandel parameter
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Slow-roll inflation in f(R,T,RabTab) gravity Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-08 Zhe Feng
In the framework of f(R,T,RabTab) gravity theory, the slow-roll approximation of the cosmic inflation is investigated, where T is the trace of the energy–momentum tensor Tab, R and Rab are the Ricci scalar and tensor, respectively. After obtaining the equations of motion of the gravitational field from the action principle in the spatially flat FLRW metric, the fundamental equations of this theory
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Rotational and self-similar solutions to the 2D Euler equations for Chaplygin gas Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-08 Guangpu Lou, Jianwei Dong
In this paper, we study the 2D Euler equations for Chaplygin gas, which is a model for dark energy of the universe in some of cosmology theories. By using an ansatz developed by Yuen, we present some rotational and self-similar analytical solutions. We obtain the global existence of the constructed solutions and investigate the qualitative properties of the gas density according to various parameters
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Efficient and secure semi-quantum private comparison protocol using three-particle GHZ-like states against participant attack Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-09 Chun-Wei Yang, Yu-Yun Huang, Jason Lin, Chia-Wei Tsai
This study identifies a participant attack vulnerability in Li et al.’s SQPC protocol. The participant attack allows a malicious participant, Bob, to obtain the participant Alice’s secret information by intercepting and measuring photons sent to Alice, and later decrypting Alice’s encrypted comparison result. An improved SQPC protocol is proposed to address this problem. The key enhancement is introducing
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Effects of the new type of extended uncertainty principle on Van der Waals black hole thermodynamics: A theoretical and deep learning approach Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-09 Abdelhakim Benkrane, Djamel Eddine Zenkhri, Abderrahmane Benhadjira
In this paper, we study the Van der Waals black holes (the case b=0) in the anti-de Sitter space under the effect of the linear extended uncertainty principle (EUP). The analysis was undertaken using deep learning by employing physics-informed neural networks in addition to the semi-classical approach, we have calculated the thermal quantities, including mass, volume, temperature, entropy, and Gibbs
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Squeezing effect on D+∕D− with nonzero chemical potential Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-09 Hong-Jie Yin, Jia-Hui Feng, Yong Zhang
The medium mass modification may lead to a squeezing effect. In the baryonic medium, the mass of D meson was expected to reduce and the in-medium masses of D+ and D− may show a splitting effect, and the chemical potential of D meson may be not zero. We study the squeezing effect on the yield ratio D+∕D− with nonzero chemical potential. Due to the in-medium mass splitting, the squeezing effect on the
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Quantization of non-Abelian Yang-Mills theories Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-08 Walaa I. Eshraim
A non-Abelian theory of fermions interacting with gauge bosons, the constrained system, is studied. The equations of motion for a singular system are obtained as total differential equations in many variables. The integrability conditions are investigated, and the set of equations of motion is integrable. The Senjanovic and the canonical methods are used to quantize the system, and the integration
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Generalized null Cartan helices and principal normal worldsheets in Minkowski 3-space Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-08 Boyuan Xu, Donghe Pei
We give a method for constructing generalized null Cartan helices, which may have singularities, by using regular space-like plane curves and smooth functions in Minkowski 3-space. We also study the principle normal worldsheet, which is deeply related to generalized null Cartan helices from the viewpoint of singularity theory.
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New bound-state solutions and statistical properties of the IMK-GIQYP and IMSK-IQYP models in 3D-NRNCPS symmetries Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-05 Abdelmadjid Maireche
Within the framework of three-dimensional non-relativistic noncommutative quantum phase-space (3D-NRNCPS) symmetries, we study the three-dimensional deformed Schrödinger equation (3D-DSE) using the improved modified Kratzer plus generalized inverse quadratic Yukawa potential (IMK-GIQYP) and the improved modified screened Kratzer plus inversely quadratic Yukawa potential (IMSK-IQYP) models. For this
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Localized wave solutions to coupled variable-coefficient fourth-order nonlinear Schrödinger equations Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-05 N. Song, M. M. Guo, R. Liu, W. X. Ma
This study investigates higher-order localized waves for coupled variable-coefficient fourth-order nonlinear Schrödinger equations, which are used to describe the simultaneous propagation of optical pulses in an inhomogeneous optical fiber. Based on the seed solutions and Lax pair, the Nth-order localized wave solutions are constructed. The interactions of rogue waves with dark–bright solitons are
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Quantum hash function based on continuous quantum walks Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-01 Wei-Min Shi, Pan Tian, Shou Wang, Yu-Guang Yang, Yi-Hua Zhou
A method of constructing a quantum hash function (QHF) based on continuous-time quantum walk is proposed, in which the time of quantum walk is controlled by the binary string message, namely, a binary string message as the input of the constructed QHF and the probability value of finally walking to the nodes on the cycle is used as the output of the QHF. Numerical simulation and performance analysis
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Neutrino mixing phenomenology: A4 discrete flavor symmetry with type-I seesaw mechanism Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-01 Animesh Barman, Ng. K. Francis, Hrishi Bora
We study a neutrino mass model with A4 discrete flavor symmetry using a type-I seesaw mechanism. The inclusion of extra flavons in our model leads to deviations from the exact tribimaximal mixing pattern resulting in a nonzero θ13 consistent with the recent experimental results and a sum rule for light neutrino masses is also obtained. In this framework, a connection is established among the neutrino
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Examining the influence of hadronic interactions on the directed flow of identified particles in RHIC Beam Energy Scan energies using UrQMD model Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-01 Aswini Kumar Sahoo, Prabhupada Dixit, Md Nasim, Subhash Singha
The directed flow of identified particles can serve as a sensitive tool for investigating the interactions during initial and final states in heavy ion collisions. This study examines the rapidity distribution (dN∕dy), rapidity-odd directed flow (v1) and its slope (dv1∕dy) for π±, K±, p, and p̄ in Au+Au collisions at different collision centralities and beam energies (sNN=7.7, 11.5, 14.5, 19.6, 27
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Majorana transformation of the Thomas–Fermi equation demystified Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-01 Abdaljalel Alizzi, Zurab K. Silagadze
The Majorana transformation makes it possible to reduce the Thomas–Fermi equation to a first-order differential equation. This reduction is possible due to the special scaling property of the Thomas–Fermi equation under homology transformations. Such reductions are well known in the context of stellar astrophysics, where the use of homology-invariant variables has long proved useful. We use homology-invariant
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Improved empirical formula for spontaneous fission half-lives Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-01 A. V. Mahesh Babu, N. Dhananjaya, H. C. Manjunatha, N. Sowmya, A. M. Nagaraja
The spontaneous fission (SF) half-lives of all 96 experimentally accessible SF emitters were examined. The SF emitters are classified as even Z-even A, odd Z-even A, odd Z-odd A and even Z-odd A. A plot of logT1∕2+kδm versus Z2∕A demonstrates a straight line, where k is variable. The logT1∕2 values produced in this study are compared to all other semi-empirical relations such as Ren et al., [Nucl.
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Probing the speed of gravitational waves beyond general relativity from CMB observations Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-01 Jun Li, Guang-Hai Guo, Yongcan Zu
In modified gravity theories, gravitational waves can propagate differently from general relativity and their propagating speed can be either constant or acquire a time dependence. We consider the constant models first and update the constraints on cosmological parameters from the combinations of Planck18+BK18 datasets. In this case, excluding superluminal propagation, we obtain the lower limit on
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A study of trends of neutron skin thickness and proton radii of mirror nuclei within the framework of covariant density functional theory Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-04-01 Pankaj Kumar, Sarabjeet Kaur, Virender Thakur, Raj Kumar, Shashi K. Dhiman
The neutron skin of atomic nuclei impacts the structure of neutron-rich nuclei, but its accurate measurement is quite challenging. We present predictions for neutron skins and proton radii for light to medium mass nuclei by employing Covariant Density Functional Theory (CDFT) based on density-dependent meson-exchange interaction. Using our microscopic predictions, we find a linear correlation between
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The accelerated expansion in F(G,TμνTμν) gravity Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-03-27 Mihai Marciu, Dana Maria Ioan
In this paper, the basic Einstein–Hilbert cosmological model is extended by adding a new functional F(G,TμνTμν) in the fundamental action, encoding specific geometrical effects due to a nontrivial coupling with the Gauss–Bonnet invariant (G), and the energy–momentum squared term (TμνTμν). After obtaining the corresponding gravitational field equations for the specific decomposition where F(G,TμνTμν)=f(G)+g(TμνTμν)
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On information paradox and the fate of black holes Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-03-22 A. Morozov
A sketchy review of the “island” paradigm in black hole evaporation theory, which actually brings us back to the old idea that interior of black hole decouples from our universe after Page time, so that Hawking radiation is entangled with emerging new universe, thus leaving no room for the information paradox. Instead this provides a self-consistent description of multiverse, where every black hole
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Heavy hexaquarks in the flux tube model Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-03-11 D. G. Sindhu, Akhilesh Ranjan, Hemwati Nandan, V. Sharma
Hexaquarks are one of the currently emerging topics in both experimental and theoretical high energy physics. Hexaquarks have been examined in relation to particle physics, however, there are still some research and theoretical conjectures surrounding their relationship to dark matter. Due to some experimental discoveries, it has attracted much interest and also resulted in new theoretical models to
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Thermodynamics of black holes charged with a conformally invariant electrodynamics in (n+1)-dimensional scalar-tensor theory Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-03-11 M. Dehghani
The Jordan frame (JF) field equations of scalar-tensor (ST) theory are strongly coupled and, the exact solutions cannot be obtained easily. By using the conformal transformation (CT), the ST action has been translated to the Einstein frame (EF) where the theory is known as the Einstein-dilaton (Ed) gravity. Also, an (n+1)-dimensional electromagnetic Lagrangian has been introduced which remains invariant
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Prediction on the alpha decay half-lives of 223−243Am isotopes Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-03-11 M. Hosseinian Rostami, S. M. Motevalli, N. Amrani, S. S. Hosseini
We studied the alpha decay half-life of Americium isotopes (Z=95) with mass numbers ranging from 223 to 243. Our investigation employed the Coulomb and proximity potential model (CPPM), in addition to alternative analytical and semiempirical formulas. The calculations took into account both experimental and theoretical Q-values, as well as the total alpha kinetic energy. We analyzed the behavior of
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Quantifying coherence via the generalized Wigner–Yanase–Dyson skew information Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-03-11 Y. J. Fan, X. Guo, Z. H. Guo, M. Zhang
Quantum coherence is an important feature that distinguishes quantum mechanics from classical physics. In this paper, we study the coherence of a quantum state with respect to a quantum channel, and introduce a coherence measure in terms of the generalized Wigner–Yanase–Dyson skew information. The basic properties and operational significance of the measure are expounded in detail, which shows that
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Supersymmetric behavior of polarized electromagnetic waves in anisotropic media Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-03-11 Felipe A. Asenjo, Sergio A. Hojman, Braulio M. Villegas-Martínez, Héctor M. Moya-Cessa, Francisco Soto-Eguibar
A medium with specific anisotropic refractive indices can induce a supersymmetric behavior in the propagation of polarized electromagnetic waves, in an analog fashion to a quantum mechanical system. The polarizations of the wave are the ones which behave as superpartners from each other. For this to happen, the anisotropy of the medium must be transverse to the direction of propagation of the wave
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On Mössbauer rotor effect, clock synchronization and third postulate of relativity Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-03-11 Christian Corda
The Mössbauer rotor effect recently gained a renewed interest due to the discovery and explanation of an additional effect of clock synchronization which has been missed for about 50 years, i.e. starting from a famous book of Pauli, till some more recent experimental analyses. The theoretical explanation of such an additional effect is due to some recent papers in the general relativistic framework
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Parisi–Wu quantization, CP violation and beyond the standard model Mod. Phys. Lett. A (IF 1.4) Pub Date : 2024-02-21 A. K. Kapoor
The Parisi–Wu scheme of quantization opens up the possibility of using anomalous fermionic gauge theories. An analysis of ultra-violet divergences reveals that the structure of counter terms is different from what is expected in conventional quantization schemes. In this paper, it is argued that there exists a possible mechanism of CP violation that requires at least three generations of quarks, a
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Comment on: “Effects of the Kaluza–Klein theory on a Klein–Gordon particle with position-dependent mass” Mod. Phys. Lett. A (IF 1.4) Pub Date : 2023-08-23 Francisco M. Fernández
In this paper, we argue that the results shown in [Mod. Phys. Lett. A34, 1950319 (2019)] are not correct. The truncation of the Frobenius method only yields some particular bound states from which one cannot derive any sound physical conclusion. The existence of allowed model parameters is an artifact of such procedure. Besides, the authors failed to obtain most of the solutions given by the truncation
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Phonon modes of magnetic vortex lattices in finite isospin chiral perturbation theory Mod. Phys. Lett. A (IF 1.4) Pub Date : 2023-08-23 Prabal Adhikari, Elizabeth Leeser, Jake Markowski
We study phonon modes associated with magnetic vortex lattices of finite isospin chiral perturbation theory near the upper critical point by introducing quasimomentum fluctuations to the lattice and calculate dispersion relations associated with the optical and acoustic modes. We find that one of the acoustic modes is massless and that its energy for small transverse quasimomentum is quartic (due the
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Addendum: Signature-causality reflection generated by Abelian gauge transformations Mod. Phys. Lett. A (IF 1.4) Pub Date : 2023-08-17 Alcides Garat
An addendum for one hidden issue in manuscript “Signature-causality reflection generated by Abelian gauge transformations” is outlined.
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Stability analysis of axial geometry with anisotropic background in f(R,T) gravity Mod. Phys. Lett. A (IF 1.4) Pub Date : 2023-08-14 M. Z. Bhatti, Z. Yousaf, M. Yousaf
In this paper, we highlight the variables preserving stability of a very restricted class of anisotropic axial symmetrical compact geometry in the scenario of f(R,T) gravity, where T stands for energy–momentum tensor’s trace and R is invariant Ricci curvature. In the framework of f(R,T) gravity, we set up field equations as well as non-conservation equations. We use a perturbation technique for all
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Scale-invariant enhancement of gravitational waves during inflation Mod. Phys. Lett. A (IF 1.4) Pub Date : 2023-08-09 Atsuhisa Ota, Misao Sasaki, Yi Wang
The inflationary 1-loop tensor power spectrum from a spectator scalar field with a sharp peak is calculated. Recent studies on primordial black holes suggest that the inflationary curvature perturbation may be huge on small scales. An enhanced curvature perturbation may arise from a drastic enhancement of spectator scalar field fluctuations. In this paper, using the in-in formalism, we calculate 1-loop
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Resonance enhancement of the electromagnetic interaction between two charged particles in the bound state in the continuum Mod. Phys. Lett. A (IF 1.4) Pub Date : 2023-08-09 A. I. Agafonov
In bound states in the continuum (BIC) the mass of a composite particle is greater than the total mass of its constituents. The BIC state is investigated in a system of two charged particles a and b with different masses (mb≫ma), using the ladder Bethe–Salpeter equation. We demonstrate that there are two momentum space regions for the positive binding energy, in which the electromagnetic interaction
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Study of exclusive two-body W decays with fully reconstructible kinematics Mod. Phys. Lett. A (IF 1.4) Pub Date : 2023-08-09 Alsu G. Bagdatova, Sergey P. Baranov, Alexander S. Sakharov
In the framework of electroweak theory and perturbative quantum chromodynamics, we examine various exclusive decay channels of W bosons that can be fully or partially reconstructed. Our findings provide predictions for the partial widths and address some gaps in previous literature. We also place a strong emphasis on understanding and estimating the associated theoretical uncertainties.
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Effect of internal magnetic flux on a relativistic spin-1 oscillator in the spinning point source-generated spacetime Mod. Phys. Lett. A (IF 1.4) Pub Date : 2023-08-09 Abdullah Guvendi, Semra Gurtas Dogan
In this paper, we consider a charged relativistic spin-1 oscillator under the influence of an internal magnetic flux in a (2+1)-dimensional spacetime induced by a spinning point source. In order to analyze the effects of the internal magnetic flux and spin of the point source on the relativistic dynamics of such a vector field, we seek a non-perturbative solution of the associated spin-1 equation derived
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Self-force effects around charged (2+1)-dimensional BTZ black hole in the Einstein–Gauss–Bonnet gravity Mod. Phys. Lett. A (IF 1.4) Pub Date : 2023-08-09 Ayyesha K. Ahmed, Azad A. Siddiqui
In this paper, we discuss a mode sum regularization method for the self-force acting on a charged test particle moving around a Banados, Teitelboim and Zanelli (BTZ) black hole. First, we have calculated the self-force on each individual mode. Then we evaluated our result by summing up the contribution on each mode. We studied a general scheme for static black holes and then present the result for
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Harmonic oscillator in the context of the extended uncertainty principle Mod. Phys. Lett. A (IF 1.4) Pub Date : 2023-08-07 Bilel Hamil, Bekir Can Lütfüoğlu, Ahmed Hocine
At large-scale distances where the space-time is curved due to gravity, a nonzero minimal uncertainty in the momentum, (ΔP)min, is being estimated to emerge. The presence of minimal uncertainty in momentum allows a modification to the quantum uncertainty principle, which is known as the extended uncertainty principle (EUP). In this work, we handle the harmonic oscillator problem in the EUP scenario
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Tree-level new physics in R(K(∗)) Mod. Phys. Lett. A (IF 1.4) Pub Date : 2023-08-07 Jong-Phil Lee
We implement the χ2 fit for R(K(∗)) with possible tree-level new physics in a model-independent parametrization. Relevant Wilson coefficients are decomposed into the new physics scale, its power, and the fermionic couplings. Constraints from the branching ratio of Bs→μ+μ− can be naturally incorporated with the scheme. For a reasonable set of the parameter ranges it is found that the new physics is
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Conformal motions of static cylindrically symmetric solutions in f(T, B) gravity Mod. Phys. Lett. A (IF 1.4) Pub Date : 2023-08-07 Shabeela Malik, Fiaz Hussain, Sirajul Haq, Muhammad Ramzan
In this paper, we investigate the conformal vector fields (CVFs) of static cylindrically symmetric (SCS) spacetimes in f(T,B) gravity, a novel modified teleparallel gravity that connects both f(T) and f(R) theories via a boundary term B. Initially, we employ an algebraic approach to extract some classes that represent SCS solutions in f(T,B) gravity. Applying the above-mentioned approach, we find solutions
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Study of rotating gravastars Mod. Phys. Lett. A (IF 1.4) Pub Date : 2023-08-04 Krishna Pada Das, Ujjal Debnath
In this work, we have discussed about a rotating gravastar model and some physical aspects in the presence of an anisotropic fluid source in the framework of General Relativity. We have considered two cases: one is gravastar’s interior fluid rigidly (or slowly) rotates, and the other is gravastar’s interior fluid non-rigidly rotates. We have considered a gravastar with three regions: interior region
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Skyrmions at finite density Mod. Phys. Lett. A (IF 1.4) Pub Date : 2023-08-03 Fabrizio Canfora, Scarlett C. Rebolledo-Caceres
In this paper, we will describe recent advances in analytical methods to construct exact solutions of the Skyrme model (and its generalizations) representing inhomogeneous Hadronic condensates living at finite Baryon density. Such novel analytical tools are based on the idea to generalize the well-known spherical hedgehog ansatz to situations (relevant for the analysis of finite density effects) in
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The large-scale structure of the universe from a modified Friedmann equation Mod. Phys. Lett. A (IF 1.4) Pub Date : 2023-08-03 J. Ambjørn, Y. Watabiki
In this paper, we have suggested that the late time expansion of the Universe is caused by the absorption of baby universes. This absorption leads to a modified Friedmann equation with one free parameter B replacing the cosmological constant. The late time cosmology is modified in such a way that one can obtain agreement with the measured values of the Hubble parameter H(z) for z between 0 and the
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Complex quintessence theory, Tsallis and Kaniadakis holographic dark energy and Brans–Dicke cosmology Mod. Phys. Lett. A (IF 1.4) Pub Date : 2023-08-03 J. Sadeghi, S. Noori Gashti, T. Azizi
In this paper, we study two different dynamic structures of holographic dark energy, namely Tsallis and Kaniadakis, within the framework of Brans–Dicke cosmology. We consider the complex form of the quintessence model and examine both non-interacting and interacting cases, calculating various cosmological parameters such as the equation of state ω and discussing the behavior of ω−ω′. We modify the
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Deep anharmonicity on the relativistic spin-0 particles within the spherical regime Mod. Phys. Lett. A (IF 1.4) Pub Date : 2023-08-02 Sami Ortakaya
We present an oscillator model of relativistic spin-0 charges moving in quantum states with minimal electromagnetic field coupling. Rather than using a perturbative approach, we implemented anharmonicity directly under the integer-dependent levels. In this way, the rest mass energy is kept at 280MeV. Within the extended Pekeris approximation, we have also improved the deep approximation to the third
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Quantum semantic coding for structure extraction and matching applications Mod. Phys. Lett. A (IF 1.4) Pub Date : 2023-07-31 Yin-Xiao Han, Yun Pan, Jing-Tao Wang
Quantum Natural Language Processing (QNLP) is coded in the semantic space using a combined semantic distribution classification model with tensor operations. Its theoretical results on quantum circuit mapping and quantum semantic coding of text have been tested in practice with the recent development of quantum back-end equipment. In view of the small scale of quantum natural language processing tasks
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Open quantum system dynamics of X-states: Entanglement sudden death and sudden birth Mod. Phys. Lett. A (IF 1.4) Pub Date : 2023-07-29 Nikhitha Nunavath, Sandeep Mishra, Anirban Pathak
In this paper, the origin of disentanglement for two specific sub-classes of X-states namely maximally nonlocal mixed states (MNMSs) and maximally entangled mixed states (MEMSs) is investigated analytically for a physical system consisting of two spatially separated qubits interacting with a common vacuum bath. The phenomena of entanglement sudden death (ESD) and the entanglement sudden birth (ESB)
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Quantitative analysis of (3He,t) charge exchange reactions at 140 MeV/u beam energy Mod. Phys. Lett. A (IF 1.4) Pub Date : 2023-07-28 Ankita, Pardeep Singh
Composite particle, (3He,t), charge exchange reactions on targets 12C, 13C, 18O, 26Mg, 58Ni and 118,120Sn at 140 MeV/u beam energy have been analyzed by employing distorted wave impulse approximation (DWIA). Specifically, unit cross-section and angular distribution have been calculated using normal optical model potential (NOMP) and single folding optical model potential (SFOMP) for both relativistic
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Quantum broadcast and multicast with non-maximally channels Mod. Phys. Lett. A (IF 1.4) Pub Date : 2023-07-27 Safa Jami, Monireh Houshmand
Broadcast and multicast protocols are two branches of multi-party quantum communication. Implementing these protocols based on partial entanglement is of great practical importance since maximally entangled channels are not robust due to noise applied by the surrounding environment. Previous research has used global operators (i.e. operators which are applied on the qubits owned by different parties)
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A study of cosmological dynamics of expansion in modified gravity and phase–space analysis Mod. Phys. Lett. A (IF 1.4) Pub Date : 2023-07-26 Muhammad Zahid Mughal, Iftikhar Ahmad
Accelerating cosmic expansion is a challenging issue faced by cosmology in the present times. Modified gravity could present a promising choice in order to understand and explain it in its framework. In this context, f(R) models of modified gravity look apparently the most compatible and viable scenario. In this work, we investigate the cosmic dynamics of the late times using a dynamical system approach
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Erratum: QED-based derivation of the general forms of the relativistic Doppler effect and of the relativistic aberration for uniformly rotating frames and for uniformly accelerated frames Mod. Phys. Lett. A (IF 1.4) Pub Date : 2023-07-26 A. Sfarti
The current paper corrects an error that occurred in a previously published paper. The error starts from Sec. 3, Eq. (3.2) whereby the scalar value of the wave-vector needs to be corrected. The net result is that the final formulas for the relativistic Doppler effect and for aberration get simplified. The source of the error is an extra multiplication factor by “c”. We need to replace the incorrect
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Hyperbolic behavior of anisotropic Bianchi type-I cosmological model Mod. Phys. Lett. A (IF 1.4) Pub Date : 2023-07-25 Md Khurshid Alam, S. Surendra Singh
Locally Rotationally Symmetric (LRS) Bianchi type-I metric is examined in the presence of perfect fluid. Exact solutions of Einstein’s field equations (EFE) have been studied by taking into account a hyperbolic scale factor. We observed that the model has initial singularity. It is found that the Universe approaches isotropy at late times. Through state finder pair {r,s}, it is observed that at late