The present article is the followup of Eur. Phys. J. C 79, 761 (2019), where we studied the energy loss of the heavy quarks traversing through the isotropic collisional hot QCD medium. As the QCD phase diagram at finite baryon density and the moderate temperature is expected to be traced by the upcoming experimental facilities such as Anti-proton and Ion Research (FAIR) and Nuclotron-based Ion Collider

We prove a sufficient condition for the stability of a stationary solution to a system of nonlinear partial differential equations of the diffusion model describing the growth of malignant tumors. We also numerically simulate stable and unstable scenarios involving the interaction between tumor and immune cells.

We study the black hole’s shadow for Schwarzschild–de Sitter and Kerr–de Sitter metrics with the contribution of the cosmological constant \(\varLambda \). Based on the reported parameters of the M87* black hole shadow, we obtain constraints for the \(\varLambda \) and show the agreement with the cosmological data. It is shown that the coupling of the \(\varLambda \)-term with the spin parameter reveals

Precision electron spectrometry in the keV range has always been considered a challenging task. The reconstruction of the original electron energy from the detected signal is not trivial because multiple effects modify the kinetic energy of the electron along its path. If not correctly accounted for, these effects can spoil and bias the reconstructed energy with a dramatic reduction of accuracy and

In this paper, we discuss the emergence of extreme events in a parametrically driven non-polynomial mechanical system with a velocity-dependent potential. We confirm the occurrence of extreme events from the probability distribution function of the peaks, which exhibits a long-tail. We also present the mechanism for the occurrence of extreme events. We found that the probability of occurrence of extreme

A very simple method is devised to derive a (strictly) isospectral extension of the Morse potential. Furthermore, point canonical transformations are used to transform the latter into quasi-exactly solvable extensions of the radial oscillator and the Coulomb potentials.

A scanner for digital radiography of large paintings has been designed and developed, aimed to in situ performances. We report here the application to “Paolo and Francesca” (\(260 \times 230 \,\hbox {cm}^{2}\)), masterpiece by the Italian divisionist painter Gaetano Previati (1909). The scanner has given the whole radiography in 1137 X-ray shots, which were corrected for X-ray inhomogeneities and finally

In this article we obtained the harmonic oscillator solution for quaternionic quantum mechanics (\(\mathbb {H}\)QM) in the real Hilbert space, both in the analytic method and in the algebraic method. The quaternionic solutions have many additional possibilities if compared to complex quantum mechanics (\(\mathbb {C}\)QM), and thus there are many possible applications to these results in future research

The wave motion equation is one of the fundamental equations to describe vibrations of continuous systems. The D’Alembert solution of the wave motion equation is an important basic formula in linear partial differential equations. The study of the D’Alembert wave deserves deep consideration in nonlinear equations. In this paper, the D’Alembert-type wave of the (2 + 1)-dimensional modified Nizhnik–Novikov–Veselov

The shape-memory effect and superelasticity properties of NiTinol alloys make them a versatile candidate for various engineering and biomedical applications. The use of these alloys as biomedical implants necessitates the study of any long-term creep failure possibility. The present study utilizes the finite element method to investigate this creep behavior of NiTinol alloys under static and dynamic

In this work, the extended Poincaré–Lighthill–Kuo (PLK) technique is devoted to reduce the fluid govern equations of complex plasma species to two coupled evolution equations (including the damping Korteweg–de Vries (dKdV) equation and damping modified Korteweg–de Vries (dmKdV) equation) for studying the dissipative soliton collisions in a collisional complex unmagnetized plasma. To find the phase

We study the net-baryon production at forward rapidities within the Color Glass Condensate paradigm. At high energy regime, the leading baryon production mechanism is shown to change from recombination to independent fragmentation. The nuclear configurational entropy (NCE) constructed upon forward scattering amplitudes allows to predict the two free parameters that govern the anomalous dimension of

On the last page of the article, there is a mistake in the first equation (QED).

In this paper, we formulate an age-space-structured HIV infection model that incorporating infection age, multiple target cells, and nonlocal dispersal. Applying the characteristic line method, we reduce the infection-age model to a delayed integro-differential system. The global well-posedness and boundedness of the semiflow for the system are established. The principal eigenvalue of the nonlocal

Laser ablation of alumina ceramics was performed in the ambient air using a 193-nm ArF excimer laser. The effect of the laser parameters (pulse repetition frequency, laser spot diameter, fluence, and the number of laser pulses) on the ablation behavior was investigated. Scanning electron microscopy, optical microscopy, Raman spectroscopy, and energy-dispersive X-ray spectroscopy (EDS) were used to

The theme of present analysis is to focus on the emission characteristics of grey particles emitted in 4π angle, forward hemisphere angle (θ < 90°) (FHS) and backward hemisphere angle (θ ≥ 90°) (BHS). We have studied the average multiplicity variation of grey particles for the events emitted from the reaction of projectiles with CNO and AgBr target nuclei of nuclear emulsion. We have also investigated

The work is concerned with the wave propagation at the interface of isolated exponentially graded couple stress thermoelastic media under initial stress and gravity. We analyse the influence of initial stress and gravity on reflection and refraction coefficients for both upper and lower couple stress thermoelastic half-spaces. Further, we found there are three waves, viz. quasi-SV and set of two longitudinal

A novel of quadruple-cation perovskite absorber has been studied. In this research, experimental current density–voltage (J-V) and external quantum efficiency (EQE) curves of a 20.56%-efficient perovskite solar cell were simulated by the device simulator entitled Solar Cell Capacitance Simulator (SCAPS). At first, uniform and single-graded models for band gap of the perovskite have been considered

In this work, we have adopted gravitational decoupling by minimal geometric deformation (MGD) approach and have developed an anisotropic version of well-known Tolman VII isotropic solution in the framework of f(R, T) gravity, where R is Ricci scalar and T is trace of energy momentum tensor. The set of field equations has been developed with respect to total energy momentum tensor, which combines effective

We use the superposition of three probes fields to modify the rotatory photon drag by strength and phases of the applied fields. Subluminal propagation is tuned to superluminal propagation with strength, phases of control field and superposition states. We measure a group index of \(\pm \,2000\) with phases of the control fields and superposition states. The group velocity is modified to \(\pm \,1

In a paper recently published in the European Physical Journal Plus, the author comments on a previous paper published by the European Physical Journal C about Sagnac effect. The author has clearly misinterpreted the paper. I don’t think that this is because of an apparent typo in the Coriolis force, but I think that it is because of some physical concepts that are only implicitly expressed through

A nonrelativistic scalar particle moving on a curved surface undergoes a geometric scattering whose behavior is sensitive to the theoretically ambiguous values of the intrinsic and extrinsic curvature coefficients entering the expression for the quantum Hamiltonian operator. This suggests using the scattering data to settle the ambiguity in the definition of the Hamiltonian. It has recently been shown

The present paper examines steady natural convection of Buongiorno’s model nanofluid flow in a square cavity with enhanced mass flux boundary condition numerically. The impact of magnetic field, Brownian motion, radiation and thermophoresis is also considered in this analysis. The governing equations are represented in terms of stream function, temperature and concentration which are solved by utilizing

In perturbation theory, the spectral densities of two-point functions develop nonintegrable threshold singularities at higher orders. In QCD, such singularities emerge when calculating the diagrams in terms of the pole quark mass, and they become stronger when one rearranges the perturbative expansion in terms of the running quark mass. In this paper, we discuss the proper way to handle such singularities

This paper discusses a statistical method of detecting nonlinearity in the light curves of active galactic nuclei (AGN). We model the light curves of AGN by two-variate stochastic differential equation (SDE) in which one variable is observable but not the other. Applying a nonparametric model of the SDE as well as its parametric models of linear and quadratic functions to the light curves provided

We investigate the celebrated mathematical SICA model but using fractional differential equations in order to better describe the dynamics of HIV-AIDS infection. The infection process is modelled by a general functional response, and the memory effect is described by the Caputo fractional derivative. Stability and instability of equilibrium points are determined in terms of the basic reproduction number

As an effective means to overcome the shortcomings of linear systems only performing well near the resonance frequency, monostable piezoelectric energy harvesters (MPEHs) have been investigated widely in the area of energy harvesting. However, it is difficult to achieve a perfectly symmetric potential energy function due to the asymmetries in magnets and materials. Therefore, the response characteristics

The exact periodic solution of an archetypal non-natural oscillator with quadratic inertia and cubic nonlinear static stiffness has been derived in terms of the elliptic integral of the third kind. The periodic solution was derived based on a new form of elliptic integral that arose naturally from the model of the archetypal non-natural oscillator. It was shown that this new form of elliptic integral

Five glass samples with the composition of 20CdO–10SrO–(70 − x) B2O3–xMoO3, where x = 0, 5, 10, 15, and 20 mol%, were analyzed for their radiation shielding properties. The study seeks to observe the effect of increasing the concentration of MoO3 on gamma photon shielding features. The linear attenuation coefficient (LAC) of the fabricated glasses was measured experimentally at five different gamma-ray

The modified two-sublattice pseudospin lattice coupled mode model Hamiltonian is extended by adding third- and fourth-order phonon anharmonic interactions, extra spin–lattice interactions, direct spin–spin interaction and an applied electric field terms considered for the study of deuterated Rochelle salt crystal. The double-time thermal-dependent Green function, Dyson equation and symmetric decoupling

The visibility graph (VG) and horizontal visibility graph (HVG) have been recently introduced as a mapping between the time series and the complex networks. Here, the relativistic nucleus–nucleus interaction data,\(^{24}\)Mg-Ag/Br at 4.5 A GeV/c are analyzed and used to characterizing the multifractal properties by extending VG, HVG and the sandbox algorithm (SB). In this work, the HVG–SB techniques

The Editor-in-Chief retracted this article [1] upon request of the Author.

The paper gives a definition of exponential arcs in the manifold of non-degenerate density matrices and uses it as a starting point to develop a parameter-free version of non-commutative Information Geometry in the finite-dimensional case. Given the Bogoliubov metric, the m- and e-connections are each other dual. Convex potentials are introduced. They allow to introduce dual charts. Affine coordinates

Anisotropic acoustic wave propagation in single crystals is a fundamental phenomenon enabling operation of various acoustic, acousto-electronic and acousto-optic devices. It provides a variety of device performances and application fields, but its role in pre-estimation of achievable device characteristics and location of crystal orientations with desired properties is often underestimated. A geometrical

Since the massive neutron stars (NSs) were detected, NSs have received more extensive attention and research. The discoveries of pulsars PSR J0348-0432 and MSP J0740\(+\)6620 confirm the existence of massive NS and therefore present a strict limit to the equation of state (EoS) of nuclear matter, but the appearance of hyperons will soften the EoS. In order to get a stiff EoS and solve the hyperon puzzle

Lugiato–Lefever model is applied through a combined global and local time-delay feedback to study the dynamic of waves in fiber cavity. Delayed feedback describes how the state of the system at a present time is influenced by its value in the past. Naturally, we carry out an analysis of the linear stability and reveal the role of the strength and the phase of the optical feedback in the presence of

To explore how density-affecting scalar influences the onset of chaos in a simplified model of thermal convection, we consider three versions of a physically extended Lorenz system obtained from incorporating additional physical ingredients such as rotation and density-affecting scalar. The three versions of the extended Lorenz system correspond to the cases when the density-affecting scalar has positive

We report the morphological and magnetic properties of deformation-induced martensite characteristics in the austenite phase of Fe69Ni27Mn4 and Fe67Ni27Mn4Zn2 (wt %) alloys after 30% plastic deformation. Scanning electron microscopy (SEM) and also physical property measurement system (PPMS) facilities were applied to investigation to clarify the deformation-induced martensite characteristics from morphological

Schrödinger equation with position-dependent mass (PDM) allows the identification of quantum wave functions in a complex environment. Following the progress of this investigation field, in this work, we consider the non-Hermitian kinetic operators associated with the PDM Schrödinger equation. We provide a simplified picture for PDM quantum systems that admit exact solutions in confining potentials

In this study, the radial Schrödinger equation is solved with the screened Kratzer potential using the series expansion method. The bound state energy spectra are obtained. To check the correctness of the result obtained from this method, we carry out suitable adjustments to the screened Kratzer potential parameters resulting in potential models, such as the Kratzer and Coulomb potentials are deduced

The Fizeau’s light birefringence dragging effect is investigated in a moving chiral medium. The effect significantly influences the subluminality, superluminality, phase shift and divergence angle between the circularly polarized birefringent modes. The maximum superluminal group velocity is measured in the range \(-4\times 10^8\)–\(1\times 10^{10}\)m/s. The group index and group velocity measured

A special class of conjugated hydrocarbons is known as phenylenes, which is composed of a special arrangement of six- and four-membered rings. In particular, any two six-membered rings (hexagons) are not adjacent, and every four-membered ring (square) is adjacent to a pair of nonadjacent hexagons. If each hexagon of phenylene is adjacent only to two squares, then the obtained chain is called the phenylene

When simulating the response of a particle detector to an energy deposition, the pulse shape and the electronic noise are important features to be taken into account. In this work, we present a method to simulate a continuous stream of detector-like data, produced to mock the salient characteristics of the chosen setup. This technique allows the full reproduction of an experimental measurement, as

In this paper, we study a family of quantum Fisher metrics based on a convex mixture of two well-known inner products, which covers the well-known symmetric logarithmic derivative, the right logarithmic derivative, and the left logarithmic derivative Fisher metrics. We then define a two-parameter family of quantum Fisher metrics, which is not necessarily monotone. We derive a necessary and sufficient

We present computational results associated with the onset of a spin-dependent optical force component occurring on zinc oxide nanowires trapped in optical tweezers with circularly polarized light. This type of non-conservative force appears directed perpendicularly with respect to the propagation direction of the incident light on the nanowires both for plane wave illumination and for optical tweezers

In this work, we have studied the isovector giant dipole resonance (IVGDR) in even-even Sm isotopes within time-dependent Hartree–Fock (TDHF) with four Skyrme forces SLy6, SVbas, SLy5 and UNEDF1. The approach we have followed is somewhat similar to the one we did in our previous work in the region of neodymium (Nd, \(Z=60\)) [Physica Scripta (2020)]. We have calculated the dipole strength of \( ^{128-164}\text

The first inflationary model conceived was the one proposed by Starobinsky which includes an additional term quadratic in the Ricci-scalar R in the Einstein–Hilbert action. The model is now considered a target for several future cosmic microwave background experiments given its compatibility with current observational data. In this paper, we analyse the robustness of the Starobinsky inflation by inserting

We propose a scheme for dissipative preparation of maximal entanglement in a two-qubit Heisenberg XXZ model interacting asymmetrically with two independent boson thermal reservoirs with different temperature. One reservoir is common to both qubits, while the other is connected with just one qubit. We analytically and numerically investigate the steady-state entanglement of the qubits, based on the

We study the reduced energy spectrum \(\{E_{i}^{(n)}\}\), which is constructed by picking one level from every n levels of the original spectrum \( \{E_{i}\}\), in a Gaussian ensemble of random matrix with Dyson index \( \beta \in \left( 0,\infty \right) \). It is shown the joint probability distribution of \(\{E_{i}^{(n)}\}\) bears the same form as \(\{E_{i}\}\) with a rescaled parameter \(\gamma

The different magnetic ordering structures of double perovskite Sr2CuIrO6 have been calculated, and the C-type antiferromagnetic structure can be determined according to the lowest energy principle, the partial density of states and the spin magnetic moments. The antiferromagnetic structure of double perovskite Sr2CuIrO6 can be explained by the semicovalent-exchange mechanism. Cu2b and Ir2a atoms are

The study of benzenoid systems has been steadily gaining momentum due to their extensive applications in many emerging fields including nanosciences. Topological descriptors provide a mathematical expression of the molecular structure of chemical compounds and their properties. They serve as efficient and cost-effective tools to theoretically predict the properties of compounds using quantitative structure–activity

In this paper, the resonant solitary waves to the (3 + 1)- and (4 + 1)-dimensional Boiti–Leon–Manna–Pempinelli (BLMP) equations are exposed via the simplified linear superposition principle (LSP). Based on the related Hirota’s bilinear equations, the resonant multi-soliton solutions and the corresponding wave numbers are formally generated. Abundant inelastic interactions, i.e., fission and fusion

A simple Planck-scale model of nature appears to yield the entire standard model of particle physics, including its fundamental constants. The conjecture derives from Dirac’s proposal to describe fermions as tethered objects and models elementary particles as rational tangles. The tangle model appears to explain the Dirac equation, the principle of least action, the observed particle spectrum of fermions

In this study, a rational beam-elastic substrate model with inclusion of nonlocal and surface-energy effects is developed for bending and buckling analyses of nanobeams lying on elastic substrate media. The beam-section kinematics follows Euler–Bernoulli beam hypothesis. The thermodynamics-based strain gradient theory is employed to represent the beam-bulk nonlocality while the Gurtin–Murdoch surface

During production, unfortunately Lei Feng has been deleted as corresponding author, and this has been corrected.

Fisher information is a cornerstone of both statistical inference and physical theory, leading to debate about whether its latter role is active or passive. Motivated by connections between Fisher information, entropy, and the quantum potential in the de Broglie–Bohm causal interpretation of quantum mechanics, the purpose of this article is to derive the position probability density when there a is

The present paper investigates size-dependent buckling analysis of a functionally graded cylindrical micro/nano shell integrated with a regular pattern of piezoelectric segments based on first-order shear deformation theory and virtual work principle. The piezoelectric segments are actuated with external voltage. The nonlocal electro-elastic relations are developed in cylindrical coordinate system

In this research paper, we examined a two-dimensional micropolar nanofluid flow in the light of a melting surface with warm nonlinear radiation and slip condition. Comparability transformations are utilized to deal with the problem equations for non-dimensionality. RKF 45-method is applied for the simulation of the demonstrated equations, and the biothermal framework is investigated for all the implanted