Fazal BadshahKalim U TariqAhmet BekirS M Raza Kazmi...
1-15页
查看更多>>摘要：The nonlinear Schrödinger equation equation is one of the most important physical models used in optical fiber theory to explain the transmission of an optical soliton.The field of chiral soliton propagation in nuclear physics is very interesting because of its numerous applications in communications and ultra-fast signal routing systems.The(1+1)-dimensional chiral dynamical structure that describes the soliton behaviour in data transmission is dealt with in this work using a variety of in-depth analytical techniques.This work has applications in particle physics,ionised science,nuclear physics,optics,and other applied mathematical sciences.We are able to develop a variety of solutions to demonstrate the behaviour of solitary wave structures,periodic soliton solutions,chiral soliton solutions,and bell-shaped soliton solutions with the use of applied techniques.Moreover,in order to verify the scientific calculations,the stability analysis for the observed solutions of the governing model is taken into consideration.In addition,the 3-dimensional,contour,and 2-dimensional visuals are supplied for a better understanding of the behaviour of the solutions.The employed strategies are dependable,uncomplicated,and effective;yet have not been utilised with the governing model in the literature that is now accessible.The resulting outcomes have impressive applications across a large number of study areas and computational physics phenomena representing real-world scenarios.The methods applied in this model are not utilized on the given models in previous literature so we can say that these describe the novelty of the work.
查看更多>>摘要：In[Phys.Rev.A 107 012427(2023)],Baldwin and Jones prove that Uhlmann-Jozsa's fidelity between two quantum states ρ and σ,i.e.,F(ρ,σ):=(Tr√ √ρσ√ρ)2,can be written in a simplified form as F(ρ,σ)=(Tr√ρσ)2.In this article,we give an alternative proof of this result,using a function power series expansion and the properties of the trace function.Our approach not only reinforces the validity of the simplified expression but also facilitates the exploration of novel dissimilarity functions for quantum states and more complex trace functions of density operators.
查看更多>>摘要：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.
查看更多>>摘要：We revisit the construction of the N=1 supersymmetric trinification models with gauge group U(3)c × U(3)L × U(3)R in Type ⅡA string theory on T6/(Z2 × Z2)orientifold with intersecting D6-branes.The non-trivial K-theory conditions and tadpole cancellation conditions severely restrict the number of allowed models even for the case of rectangular two-tori.Using a supervised search algorithm,we find a few four-family models where the highest wrapping number is 2.For these models,we present the complete particle spectra and the gauge coupling relations at the string-scale.
查看更多>>摘要：The axion-like particle(ALP)is one kind of the best-motivated new particles.We consider its production from the pseudoscalar mesonic decays M → M'a,with M being a pseudoscalar meson B or K.The upper limits on the flavor-conserving ALP-quark coupling parameter gu are obtained by assuming the ALP to be an invisible particle.We find that the most severe constraint on gu comes from the decay K+→π+v(v)for 0.05 GeV ≤ Ma ≤ 0.35 GeV,while the decays B+,0 → K+,0v(v)and B+,0 → π+,0v(v)can also generate significant constraints.
查看更多>>摘要：We present a lattice quantum chromodynamics(QCD)simulation with 2+1+1 flavor full QCD ensembles using near-physical quark masses and different spatial sizes L,at a～0.055 fm.The results show that the scalar and pesudoscalar 2-point correlator with a valence pion mass of approximately 230 MeV become degenerated at L ≤ 1.0 fm,and such an observation suggests that the spontaneous chiral symmetry breaking disappears effectively at this point.At the same time,the mass gap between the nucleon and pion masses remains larger than ΛQCD in the entire L ∈[0.2,0.7]fm range.
查看更多>>摘要：The role of the delta isobar degrees of freedom in nucleon-nucleon scattering is revisited.We attempt to understand why the dimensionally regularized two-pion exchanges with the explicit delta isobar is much stronger than the ones with spectral function regularization.When the cut-off value of spectral function regularization is varied,the isoscalar central component exhibits a rather large cut-off variation.This reveals a surprisingly large numerical factor of the deltaful two-pion exchange potentials.The power counting is adjusted accordingly and we discuss the results and how to improve upon this finding.
查看更多>>摘要：We investigate the constant-roll inflation with non-minimally kinetic coupling to the Einstein tensor.With the slow-roll parameter ηφ=-(φ)/(H(φ))being a constant,we calculate the power spectra for scalar and tensor perturbations,and derive the expressions for the scalar spectral tilt ns,the tensor spectral tilt nT,and the tensor-to-scalar ratio r.We find that the expressions for ns are different with different ordering of taking the derivative of the scalar power spectrum with respect to the scale k and the horizon crossing condition csk=aH in the constant-roll inflation,the consistency relation r=-8nT does not hold if|ηφ|is not small,and the duality of the tensor-to-scalar ratio between the slow-roll inflation and ultra-slow-roll inflation does not exist in inflationary models with non-minimally derivative coupling.The result offers a fresh perspective on the understanding of the inflationary models with non-minimally derivative coupling and is helpful for the production of scalar induced gravitational waves in the framework of ultra-slow-roll inflation with non-minimally derivative coupling.
查看更多>>摘要：In this paper,we study tidal forces in the Schwarzschild black hole,whose metric explicitly includes a generalized uncertainty principle(GUP)effect.We also investigate interesting features of the geodesic equations and tidal effects that are dependent on the GUP parameter αrelated to a minimum length.Then,by solving the geodesic deviation equations explicitly with appropriate boundary conditions,we show that α in the effective metric affects both the radial and angular components of the geodesic equation,particularly near the singularities.
查看更多>>摘要：This article considers a static and spherical black hole(BH)inf(Q)gravity.f(Q)gravity is the extension of symmetric teleparallel general relativity,where both curvature and torsion are vanishing and gravity is described by nonmetricity.In this study,we investigate the possible implications of quasinormal mode(QNM)modified Hawking spectra and deflection angles generated by the model.The Wentzel-Kramers-Brillouin method is used to solve the equations of motion for massless Dirac perturbation fields and explore the impact of the nonmetricity parameter(Q0)Based on the QNM computation,we can ensure that the BH is stable against massless Dirac perturbations and as Q0 increases the oscillatory frequency of the mode decreases.We then discuss the weak deflection angle in the weak field limit approximation.We compute the deflection angle up to the fourth order of approximation and show how the nonmetricity parameter affects it.We find that the Q0 parameter reduces the deflection angle.
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