Results for "A. -V. Mudring"

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Anomalous Composition-Induced Crossover in the Magnetic Properties of the Itinerant-Electron Antiferromagnet Ca{1-x}Sr{x}Co{2-y}As{2}Nov 09 2017The inference of Ying et al. [EPL 104, 67005 (2013)] of a composition-induced change from c-axis ordered-moment alignment in a collinear A-type antiferromagnetic (AFM) structure (AFMI) at small x to ab-plane alignment in an unknown AFM structure (AFMII) ... More
Helical Antiferromagnetic Ordering in EuNi{1.95}As2Jul 10 2019The Eu{+2} spins-7/2 in EuNi2As2 with the body-centered tetragonal ThCr2Si2 structure order antiferromagnetically below the Neel temperature TN =15 K into a helical antiferromagnetic (AFM) structure with the helix axis aligned along the tetragonal c axis ... More
Enhanced moments of Eu in single crystals of the metallic helical antiferromagnet EuCo{2-y}As2Jan 26 2018The compound EuCo{2-y}As2 with the tetragonal ThCr2Si2 structure is known to contain Eu{+2} ions with spin S = 7/2 that order below a temperature TN = 47 K into an antiferromagnetic (AFM) proper helical structure with the ordered moments aligned in the ... More
Non-Fermi-liquid behaviors associated with a magnetic quantum-critical point in Sr(Co{1-x}Ni{x})2As2 single crystalsJul 18 2019Electron-doped Sr(Co{1-x}Ni{x})2As2 single crystals with compositions x = 0 to 0.9 were grown out of self-flux and SrNi2As2 single crystals out of Bi flux. The crystals were characterized using single-crystal x-ray diffraction (XRD), magnetic susceptibility ... More
Determination of hadronic partial widths for scalar-isoscalar resonances f0(980), f0(1300), f0(1500), f_0(1750) and the broad state f0(1530^{+90}_{-250})Feb 28 2001Mar 06 2001In the article of V.V. Anisovich et al., Yad. Fiz. 63, 1489 (2000), the K-matrix solutions for the wave IJ^{PC}=00^{++} were obtained in the mass region 450 - 1900 MeV where four resonances f0(980), f0(1300), f0(1500), f0(1750) and the broad state f0(1530^{+90}_{-250}) ... More
Systematics of q anti-q states in the (n,M^2) and (J,M^2) planesMar 13 2000In the mass region up to M < 2400 MeV we systematise mesons on the plots (n,M^2) and (J,M^2), thus setting their classification in terms of n^{2S+1}L_J q anti-q states. The trajectories on the (n,M^2)-plots are drawn for the following (IJ^{PC})-states: ... More
Scalar glueball: analysis of the (IJ^{PC}=00^{++})-waveFeb 14 1997Basing on the previously performed K-matrix analysis of experimental data, we investigate, in the framework of the propagator matrix (D-matrix) technique, the 1100-1900 MeV mass region, where overlapping resonances $f_0(1300)$, $f_0(1500)$, $f_0(1530^{+90}_{-250})$, ... More
Vertex operators for production of baryon resonances in nucleon-gamma collisions with preserving gauge invariance and analyticitySep 22 2016Vertex operators for photo- and electro-production of baryon states with arbitrary spin-parity, $ \gamma + N\to B(J^P)$, are constructed. The operators obey gauge invariance and analyticity constraints. Analyticity is realized as a requirement of the ... More
Screening and finite size corrections to the octupole and Schiff momentsMay 24 2012Parity (P) and time reversal (T) violating nuclear forces create P, T -odd moments in expansion of the nuclear electrostatic potential. We derive expression for the nuclear electric octupole field which includes the electron screening correction (similar ... More
Stimulated coherent spontaneous emission in an FEL with `quiet' bunchesMay 11 2012For a planar FEL configuration we study stimulated coherent spontaneous emission driven by a gradient of the bunch current in the presence of different levels of noise in bunches. To perform a vast amount of simulations required for obtaining statistically ... More
Loop groups, Clusters, Dimers and Integrable systemsJan 08 2014We describe a class of integrable systems on Poisson submanifolds of the affine Poisson-Lie groups $\widehat{PGL}(N)$, which can be enumerated by cyclically irreducible elements the co-extended affine Weyl groups $(\widehat{W}\times \widehat{W})^\sharp$. ... More
The analysis of reactions $πN\to two mesons + N$ within reggeon exchanges. 2. Basic formulas for fitJun 10 2008Mar 03 2009We present technical aspects of the fitting procedure given in the paper V.V. Anisovich and A.V. Sarantsev {\it The analysis of reactions $\pi N\to two mesons + N$ within reggeon exchanges. 1. Fit and results.} (arxiv:0806.1601v1)
Process pi p -> pi pi N at high energies and moderate momenta transferred to the nucleon and the determination of parameters of the f_0(980) and f_0(1300)Mar 14 2002Apr 26 2002We present the results of simultaneous analysis of the S-wave pi pi-spectra in the reactions pi^- p -> (pi^0 pi^0)_S n at p_{lab}=38 GeV/c (GAMS) and pi^- p -> (pi^+ pi^-)_S n at p_{lab}=18 GeV/c (E852 Collaboration) at moderate momenta transferred to ... More
Stable and unstable vector dark solitons of coupled nonlinear Schrödinger equations. Application to two-component Bose-Einstein condensatesJun 28 2005Dynamics of vector dark solitons in two-component Bose-Einstein condensates is studied within the framework of the coupled one-dimensional nonlinear Schr\"odinger (NLS) equations. We consider the small amplitude limit in which the coupled NLS equations ... More
Relativistic view on the nuclear effects in the deep inelastic scattering on deuteronApr 10 1996We analyze nuclear effects in the deep inelastic scattering on deuteron in the framework of the covariant approach. It is shown that this approach gives us the way to investigate the role of relativistic effects in the deep inelastic scattering (DIS) ... More
Ponderomotive forces in electrodynamics of moving media: The Minkowski and Abraham approachesApr 06 2016Nov 08 2016In the general setting of the problem, the explicit compact formulae are derived for the ponderomotive forces in the macroscopic electrodynamics of moving media in the Minkowski and Abraham approaches. Taking account of the Minkowski constitutive equations ... More
Calculation of the (T,P)-odd Electric Dipole Moment of ThalliumSep 02 2009Parity and time invariance violating electric dipole moment of $^{205}$Tl is calculated using the relativistic Hartree-Fock and configuration interaction methods and the many-body perturbation theory. Contributions from the interaction of the electron ... More
Atomic calculations and search for variation of the fine structure constant in quasar absorption spectraMay 05 2008May 06 2008A brief review of the search for variation of the fine structure constant in quasar absorption spectra is presented. Special consideration is given to the role of atomic calculations in the analysis of the observed data. A range of methods which allow ... More
Parity nonconservation in hyperfine transitionsNov 21 2011We use relativistic Hartree-Fock and correlation potential methods to calculate nuclear spin-dependent parity non-conserving amplitudes (dominated by the nuclear anapole moment) between hyperfine structure components of the ground state of odd isotopes ... More
Comment on "Reappraisal of the Electric Dipole Moment Enhancement Factor for Thallium"Aug 17 2011Sep 23 2011Recent paper by Nataraj {\em et al} (Phys. Rev. Lett. {\bf 106}, 200403 (2011)) presents calculations of the EDM enhancement factor for Tl, which disagrees with previous most accurate calculations. The authors claim that their calculations of Tl EDM are ... More
Atomic optical clocks and search for variation of the fine structure constantAug 24 1999Theories unifying gravity and other interactions suggest the possibility of spatial and temporal variation of physical ``constants''. Accuracy achieved for the atomic optical frequency standards (optical clocks) approaches the level when possible time ... More
Interaction of linear waves and moving Josephson vortex lattices in layered superconductorsJan 03 2010A general phenomenological theory describing dynamics of Josephson vortices coupled to wide class of linear waves in layered high-T$_c$ superconductors is developed. The theory is based on hydrodynamic long wave approximation and describes interaction ... More
Instability of a rectangular vortex lattice in a stack of two long Josephson junctionsJun 04 2002We investigate the stability of a rectangular Josephson vortex lattice in a stack of two long Josephson junctions. It is shown that in an infinite stack at low velocities the lattice is unstable with respect to triangular vortex lattice formation and ... More
Integrable ODEs on Associative AlgebrasAug 06 1999In this paper we give definitions of basic concepts such as symmetries, first integrals, Hamiltonian and recursion operators suitable for ordinary differential equations on associative algebras, and in particular for matrix differential equations. We ... More
Systems of Gibbons-Tsarev type and integrable 3-dimensional modelsJun 18 2009We review the role of Gibbons-Tsarev-type systems in classification of integrable multi-dimensional hydrodynamic-type systems. Our main observation is an universality of Gibbons-Tsarev-type systems. We also constract explicitly a wide class of 3-dimensional ... More
Kinetic equations for the hopping transport and spin relaxation in random magnetic fieldApr 22 2015Jul 02 2015We derive the kinetic equations for the hopping transport that take into account electron spin and the possibility of double occupation. In the Ohmic regime the equations are reduced to the generalized Miller-Abrahams resistor network. We apply these ... More
Nonstationary Casimir effect in cavities with two resonantly coupled modesSep 04 2001We study the peculiarities of the nonstationary Casimir effect (creation of photons in cavities with moving boundaries) in the special case of two resonantly coupled modes with frequencies $\omega_0$ and $(3\Delta)\omega_0$, parametrically excited due ... More
Excitation of the classical electromagnetic field in a cavity containing a thin slab with a time-dependent conductivityApr 18 2016An exact infinite set of coupled ordinary differential equations, describing the evolution of the modes of the classical electromagnetic field inside an ideal cavity, containing a thin slab with the time-dependent conductivity $\sigma(t)$ and dielectric ... More
Energy-time and frequency-time uncertainty relations: exact inequalitiesApr 03 2015We give a short review of known exact inequalities that can be interpreted as "energy-time" and "frequency-time" uncertainty relations. In particular we discuss a precise form of signals minimizing the physical frequency-time uncertainty product. Also, ... More
The dressing procedure for the cosmological equations and the indefinite future of the universeJan 21 2007Feb 05 2007In this paper we present a new simple method of construction of infinite number of solutions of Freidmann equations from the already known ones, which allows for a startling conclusion of practical impossibility of correct predictions on the universe's ... More
Quantum magnets with large single-ion easy-plane anisotropy in transverse magnetic fieldDec 05 2011We discuss low-temperature properties of magnets with integer spin and large single-ion easy-plane anisotropy $D$ in transverse magnetic field $h$. Considering the exchange interaction between spins as a perturbation and using the diagram technique we ... More
On extension of minimality principle in supersymmetric electrodynamicsJun 14 1997Nov 06 1997A possibility of an extension of the minimality principle for electromagnetic interactions of charged and neutral particles having spin 1/2 is investigated.
The semiclassical tunneling probability in quantum cosmologies with varying speed of lightOct 23 2004Nov 10 2004In quantum cosmology the closed universe can spontaneously nucleate out of the state with no classical space and time. The semiclassical tunneling nucleation probability can be estimated as $\emph{P}\sim\exp(-\alpha^2/\Lambda)$ where $\alpha$=const and ... More
Ultra-High Energy Cosmic Rays: a Window to Post-Inflationary Reheating Epoch of the Universe?Sep 18 1997We conjecture that the highest energy cosmic rays beyond the Greisen-Zatsepin-Kuzmin cut-off may provide a unique window into the very early epoch of the Universe, namely, that of reheating after inflation, provided these cosmic rays are due to decays ... More
Unraveling hadron structure with generalized parton distributionsApr 05 2005Jun 27 2005The generalized parton distributions, introduced nearly a decade ago, have emerged as a universal tool to describe hadrons in terms of quark and gluonic degrees of freedom. They combine the features of form factors, parton densities and distribution amplitudes--the ... More
Photoionization of a strongly polarizable targetSep 18 2008We demonstrate that the angular distribution of photoelectrons from a strongly polarizable target exposed to a laser field can deviate noticeably from the prediction of conventional theory. Even within the dipole-photon approximation the profile of distribution ... More
Fractional diffusion of cosmic raysJul 13 2001We consider the propagation of galactic cosmic rays under assumption that the interstellar medium is a fractal one. An anomalous diffusion equation in terms of fractional derivatives is used to describe of cosmic ray propagation. The anomaly in used model ... More
On Decay of Correlations for Exclusion Processes with Asymmetric Boundary ConditionsNov 29 2011We consider a symmetric exclusion process on a discrete interval of $S$ points with various boundary conditions at the endpoints. We study the asymptotic decay of correlations as $S\to\infty$. The main result is asymptotic independence of a stationary ... More
Multipomeron quasi-eikonal model for single diffraction processesDec 29 2003Single diffraction processes was usually treated in the triple-reggeon framework, but this formalism is inconsistent with CDF data. In this paper we show, that multipomeron quasi-eikonal model gives agreement with these data. Cross-section of single diffraction ... More
Gravireggeons and transplanckian scattering in models with one extra dimensionApr 22 2005Apr 24 2005The inelastic scattering of the brane fields induced by $t$-channel gravireggeons exchanges in the RS model with a small curvature $\kappa$ is considered, and the imaginary part of the eikonal is analytically calculated. It is demonstrated that the results ... More
Does Efficiency of High Energy Collisions Depend on a Hard Scale?Mar 09 2000Mar 28 2000The multiplicity of charged hadrons in the current fragmentation region of both the c.m.s. and the Breit frame of deep inelastic scattering is calculated and compared with the HERA data. The results are in agreeement with Yang's hypothesis that the efficiency ... More
Does the ``Soft Pomeron'' Cope with the HERA Data?Nov 13 1997It is demonstrated that the "soft pomeron" (together with a secondary reggeon) describing cross-sections of hadron-hadron collisions is fairly able to describe the energy dependence of cross-sections of exclusive (virtual) photoproduction of vector mesons ... More
Gravireggeons in Extra Dimensions and Interaction of Ultra-high Energy Cosmic Neutrinos with NucleonsNov 27 2003Dec 04 2003We present the results on non-perturbative quantum gravity effects related to extra dimensions which can be comparable, in some cases, with the SM contributions, e.g. in lepton-lepton or lepton-nucleon scattering. The case of cosmic neutrino gravitational ... More
Regge-Eikonal Approach and its off-Shell Extention Versus Experimental DataDec 05 1999We develop an off-shell extention of the Regge-eikonal approach which automatically takes into account off-shell unitarity. We argue that exclusive vector-meson production cross-sections measured at HERA can be fairly described with classical universal ... More
Is the `Soft Pomeron' Valid for the Description of the Data from HERA?Jun 05 1997It is established in the paper that experimental data on deeply virtual exclusive electroproduction of $\rho^0$- and $\phi$-mesons may be described fairly well in the framework of a generalized Regge approach without additional, $Q^2$-dependent, singularities ... More
The kinetic description of vacuum particle creation in the oscillator representationJul 21 2003Aug 30 2003The oscillator representation is used for the non-perturbative description of vacuum particle creation in a strong time-dependent electric field in the framework of scalar QED. It is shown that the method can be more effective for the derivation of the ... More
Moment-operator expansion for the two-meson, two-photon and fermion-antifermion statesMay 31 2001Sep 11 2001A complete set of formulae in terms of the moment-operator expansion is presented for the two-meson, two-photon and fermion-antifermion states that can be used in the analysis of scalar (S) and pseudoscalar (P) meson production in anti-p p and gamma-gamma ... More
Effect of dielectric confinement on energetics of quantum metal filmsSep 05 2012Sep 25 2012We suggest a method for the self-consistent calculations of characteristics of metal films in dielectric environment. Within a modified Kohn-Sham method and stabilized jellium model, the most interesting case of asymmetric metal-dielectric sandwiches ... More
Relativistic effects in Sr, Dy, YbII and YbIII and search for variation of the fine structure constantMay 15 2003A possibility for fundamental constants to vary in time is suggested by theories unifying gravity with other interactions. In this article we examine proposals to use optical transitions of Sr, Dy, YbII and YbIII for the search of the time variation of ... More
Exotic mesons, locking states and their role in the formation of the confinement barrierFeb 26 1998We discuss a mechanism by which a set of $q\bar q$-states mixes with an exotic one, so that the exotic state accumulates the widths of the overlapping $\bar qq$ resonances. The broad state created this way acts as a 'locking' state for the others. Using ... More
Photon generation from vacuum in nondegenerate cavities with regular and random periodic displacements of boundariesAug 26 2003We study the influence of fluctuations in periodic motion of boundaries of an ideal three-dimensional cavity on the rate of photon generation from vacuum due to the nonstationary Casimir effect.
The Study of a Temperature Dependence of the Dark Rate of Single Electrons Emitted from a Cathode of a Multi-Cathode Counter as a Method to Search for Hidden Photons of CDMAug 22 2016The dark rate of single electrons emitted from a metal cathode of the counter depends upon a temperature. At cryogenic temperatures the dark rate measured with bi-alkaline cathodes of PMT has been found to increase by lowering the temperature of the detector. ... More
On a Search for Hidden Photon CDM by a Multi-Cathode CounterMar 29 2016Jun 09 2016We report on a new technique of a Multi-Cathode Counter (MCC) developed to search for hidden photon (HP) cold dark matter (CDM) with a mass from 5 to 500 eV. The method is suggested in the assumption that HP-photon mixing causes emission of single electrons ... More
Radiative decays of mesons in the quark model: relativistic and non-relativistic approachesMay 20 2003Jan 30 2004Different conclusions about quark nature of f0(980) based on the analysis of data on the reaction phi(1020) -> gamma f0(980) make it necessary to perform detailed comparison of formulae used by various groups for the calculation of partial widths of radiative ... More
Anomalies of Transport in Reflectionally Noninvariant TurbulenceJun 06 1997We consider the transport of passive admixture in locally homogeneous isotropic reflectionally noninvariant turbulence of incompressible fluid. It is shown that anomalous convective flow appears which direction does not coincide with that of a mean flow. ... More
Diffractive processes at high energiesSep 11 2004In this work we calculate pomeron flux in the single diffraction processes. We consider two models: quasi-eikonal model and low constituent model. Both models give the pictures different from the traditional three-reggeon model. Successive developing ... More
Radiative decays of basic scalar, vector and tensor mesons and the determination of the P-wave q\bar q multipletAug 23 2001We perform simultaneous calculations of the radiative decays of scalar mesons f_0(980)-> \gamma\gamma, a_0(980)-> \gamma\gamma, vector meson \phi(1020)-> \gamma f_0(980), \gamma a_0(980), \gamma \pi^0, \gamma \eta, \gamma \eta' and tensor mesons a_2(1320)-> ... More
Quark structure of f0(980) from the radiative decays phi(1020)->gamma f0(980), gamma eta, gamma eta', gamma pi0 and f0(980)->gamma gammaNov 15 2000Mar 27 2001Partial widths of the radiative decays $\phi(1020)\to\gamma f_0(980)$, $\gamma\eta$, $\gamma\eta'$, $\gamma\pi^0$ and $f_0(980)\to\gamma\gamma$ are calculated assuming all mesons under consideration to be $q\bar q$ states: $\phi(1020)$ is dominantly an ... More
Hard bremsstrahlung from a high-voltage atmospheric discharge and its anisotropyJul 20 2018The results of the experiments on recording hard gamma radiation and measurements of its angular distribution at the initial stage of a laboratory high-voltage atmospheric discharge are presented. The experiments were performed on an ERG installation ... More
Laser Induced Heat Diffusion Limited Tissue Coagulation: Problem and General PropertiesDec 30 2000Previously we have developed a free boundary model for local thermal coagulation induced by laser light absorption when the tissue region affected directly by laser light is sufficiently small and heat diffusion into the surrounding tissue governs the ... More
A Spectroscopic Study of the Peculiar Galaxy UGC 5600Jun 23 2002We present our observations of the galaxy UGS 5600 with a long-slit spectrograph (UAGS) and a multi-pupil field spectrograph (MPFS) using the 6-m telescope at Special Astrophysical Observatory. Radial-velocity fields of the stellar and gaseous components ... More
Model of fragmentation of the exciton inner ring in semiconductor quantum wellsSep 01 2016The appearance of the non-homogeneous structures of the indirect exciton density distribution in the region of the quantum well (in the region of the inner ring) is explained. The structure (the fragmentation) occurs due to the exciton condensed phase ... More
High-precision atomic clocks with highly charged ions: nuclear spin-zero $f^{12}$-shell ionsSep 18 2012Optical atomic clocks using highly-charged ions hold an intriguing promise of metrology at the 19th significant figure. Here we study transitions within the $4f^{12}$ ground-state electronic configuration of highly charged ions. We consider isotopes lacking ... More
Minimum Velocity Dispersion in Stable Stellar Disks. Numerical SimulationsJun 10 2003Jun 17 2003N-body dynamical simulations are used to analyze the conditions for the gravitational stability of a three-dimensional stellar disk in the gravitational field of two rigid spherical components--a bulge and a halo whose central concentrations and relative ... More
Phase Transitions in One-Dimensional Truncated Bosonic Hubbard Model and Its Spin-1 AnalogSep 03 1997We study one-dimensional truncated (no more than 2 particles on a site) bosonic Hubbard model in both repulsive and attractive regimes by exact diagonalization and exact worldline Monte Carlo simulation. In the commensurate case (one particle per site) ... More
The study of leading twist light cone wave function of η_c mesonNov 02 2006Jan 15 2007This paper is devoted to the study of leading twist light cone wave function of $\eta_c$ meson. The moments of this wave function have been calculated within three approaches: potential models, nonrelativistic QCD and QCD sum rules. Using the results ... More
A decay of the ultra-high-energy neutrino $ν_e \to e^- W^+$ in a magnetic field and its influence on the shape of the neutrino spectrumOct 04 2010The width of the neutrino decay into the electron and $W$ boson in a strong external magnetic field is obtained from the imaginary part of the neutrino self-energy. This result corrects the formulae existing in the literature. The mean free path of an ... More
Sudden extinction of a critical branching process in random environmentSep 05 2008Let $T$ be the extinction moment of a critical branching process $Z=(Z_{n},n\geq 0) $ in a random environment specified by iid probability generating functions. We study the asymptotic behavior of the probability of extinction of the process $Z$ at moment ... More
Localization-delocalization transition on a separatrix system of nonlinear Schrodinger equation with disorderMar 15 2012Localization-delocalization transition in a discrete Anderson nonlinear Schr\"odinger equation with disorder is shown to be a critical phenomenon $-$ similar to a percolation transition on a disordered lattice, with the nonlinearity parameter thought ... More
Spin-wave spectra of a kagome stripeAug 09 2007We study ground state degeneracy and spin-wave excitations in a 1D version of a Kagome antiferromagnet -- a Heisenberg antiferromagnet on a Kagome stripe. We show that for nearest-neighbor interaction, the classical ground state is infinitely degenerate. ... More
Raman resonance in spin S two-leg ladder systemsMar 17 2005We argue that the Raman intensity in a spin S two-leg spin-ladder has a pseudo-resonance peak, whose width is very small at large S. The pseudo-resonance originates from the existence of a local minimum in the magnon excitation spectrum, and is located ... More
Higher orders and IR renormalon phenomenology in DVCSJan 09 1998Apr 10 1998We present results for higher order perturbative corrections to Compton scattering in the generalized Bjorken kinematics. The approach we have used is based on the combination of two techniques: conformal operator product expansion on the one side, and ... More
Energy and material efficient non-circular bore Bitter magnetsJun 04 2015Jul 16 2016There exist a number of experiments/applications where the second dimension of the bore of Bitter magnets is not fully utilized. Using an analytical solution for elliptical bore coils, we show that reducing one of the dimensions of the bore can lead to ... More
Three Pomerons vs DO and TOTEM DataDec 09 2012This note highlights the predictive power of the 3-component Pomeron model designed by the authors ten years ago with a partial account of the multiplicity of Pomerons in QCD. The model is put to the test by comparing its predictions with the recent data ... More
The analysis of reactions $πN\to two mesons + N$ within reggeon exchanges. 1. Fit and resultsJun 10 2008Mar 03 2009The novel point of this analysis is a direct use of reggeon exchange technique for the description of the reactions $\pi N\to two mesons + N$ at large energies of the initial pion. This approach allows us to describe simultaneously distributions over ... More
Effected of Feshbach resonance on dynamics of matter waves in optical latticesSep 26 2004Sep 06 2005Mean-filed dynamics of a Bose-Einstein condensate (BEC) loaded in an optical lattice (OL), confined by a parabolic potentials, and subjected to change of a scattering length by means of the Feshbach resonance (FR), is considered. The system is described ... More
Rashba spin-orbit interaction in a circular quantum ring in the presence of a magnetic fieldDec 05 2012Exact wave functions and energy levels are obtained for an electron in a two-dimensional semiconductor circular quantum ring with a confining potential of finite depth in the presence of both an external magnetic field and the Rashba spin-orbit interaction. ... More
Macroscopic approach to the Casimir friction forceMar 13 2014Apr 23 2014The general formula is derived for the vacuum friction force between two parallel perfectly flat planes bounding two material media separated by a vacuum gap and moving relative to each other with a constant velocity $\mathbf{v}$. The material media are ... More
Canonical isomorphism of two Lie algebras arising in CR-geometryApr 09 1998We show that the maximal prolongation of a certain algebra associated with a non-degenerate Hermitian form on ${\Bbb C}^n\times{\Bbb C}^n$ with values in ${\Bbb R}^k$ is canonically isomorphic to the Lie algebra of infinitesimal holomorphic automorphisms ... More
Calculation of nuclear-spin-dependent parity nonconservation in s-d transitions of Ba$^+$, Yb$^+$ and Ra$^+$ ionsApr 01 2011We use correlation potential and many-body perturbation theory techniques to calculate spin-independent and nuclear spin-dependent parts of the parity nonconserving amplitudes of the transitions between the $6s_{1/2}$ ground state and the $5d_{3/2}$ excited ... More
Search for variation of the fundamental constants in atomic, molecular and nuclear spectraMay 05 2008May 07 2008The search for variation of the fundamental constants such as the fine structure constant $\alpha$ ($\alpha=e^2/\hbar c$) and the ratios of fundamental masses (e.g., electron to proton mass ratio $\mu=m_e/m_p$) is reviewed. Strong emphasis is given to ... More
Relativistic corrections to transition frequencies of Fe I and search for variation of the fine structure constantNov 28 2007Relativistic energy shifts of the low energy levels of Fe have been calculated using the Dirac-Hartree-Fock and configuration interaction techniques. The results are to be used in the search for the space-time variation of the fine structure constant ... More
Parity violation and electric dipole moments in atoms and moleculesSep 11 2012We review the current status of the study of parity and time invariance violation in atoms, nuclei and molecules. We focus on parity non-conservation in cesium and three of the most promising areas of research: (i) parity non-conservation in a chain of ... More
Highly charged ions for atomic clocks and search for variation of the fine structure constantFeb 04 2015We review a number of highly charged ions which have optical transitions suitable for building extremely accurate atomic clocks. This includes ions from Hf$^{12+}$ to U$^{34+}$, which have the $4f^{12}$ configuration of valence electrons, the Ir$^{17+}$ ... More
Relativistic energy shifts in Ge II, Sn II and Pb II and search for cosmological variation of the fine structure constantJan 21 2005Sensitivity of atomic transition frequencies to variation of the fine structure constant $\alpha=e^2/\hbar c$ increases proportional to $Z^2$ where $Z$ is the nuclear charge. Recently several lines of heavy ions Ge II, Sn II and Pb II have been detected ... More
Could nanostructure be unspeakable quantum system?Jun 28 2010Heisenberg, Bohr and others were forced to renounce on the description of the objective reality as the aim of physics because of the paradoxical quantum phenomena observed on the atomic level. The contemporary quantum mechanics created on the base of ... More
Spectral caustic in two-color high harmonic generation: role of Coulomb effectsJan 29 2019The high-order harmonic spectrum generated in two-color intense laser field under certain conditions has a pronounced maximum caused by the so called spectral caustic. Using a numerical solution of the 3D time-dependent Schr\"odinger equation we study ... More
Commutative Poisson subalgebras for the Sklyanin bracket and deformations of known integrable modelsDec 08 2001A hierarchy of commutative Poisson subalgebras for the Sklyanin bracket is proposed. Each of the subalgebras provides a complete set of integrals in involution with respect to the Sklyanin bracket. Using different representations of the bracket, we find ... More
Dynamical Casimir Effect in cavity with N-level detector or N-1 two-level atomsMay 15 2012We study the photon generation from vacuum via the Dynamical Casimir Effect in a cavity containing a N-level detector in equally-spaced resonant ladder configuration or N-1 identical resonant two-level atoms. If the modulation frequency equals exactly ... More
Ab initio zone-center phonons in LiTaO3: comparison to LiNbO3May 12 2001The four A1-TO Gamma phonon frequencies in lithium tantalate are calculated in the frozen-phonon approach from first principles using the full-potential linearized augmented plane wave method. A good agreement with the experimental data available is found ... More
Optical Observations of PSR J0205+6449Jul 07 2008PSR J0205+6449 is a X-ray and radio pulsar in supernova remnant 3C 58. We report on observations of the central region of 3C 58 using the 4.2-m William Herschel Telescope with the intention of identifying the optical counterpart of PSR J0205+6449 and ... More
A study of double- and multi-mode RR Lyrae variablesFeb 19 2016We present the results of our new study of known RR Lyrae variable stars. All observations available for these stars in the Catalina Surveys were analyzed, and double-mode variations were identified. We studied the Petersen diagram and period distribution ... More
A Review of Coronagraphic Observations of Shocks Driven by Coronal Mass EjectionsAug 14 2009The existence of shocks driven by Coronal Mass Ejections (CMEs) has always been assumed based on the superalfvenic speeds for some of these events and on indirect evidence such as radio bursts and distant streamer deflections. However, the direct signature ... More
Glasma Evolution in Partonic MediumNov 23 2010We examine a scenario of the abelianized Glasma evolution with accounting for back-reaction of partonic medium in ultrarelativistic heavy-ion collisions. We announce that such a generalization leads to the instabilities and the presence of negative color ... More
Probability of Creation of Extra Dimensions in Nuclear CollisionsJun 22 2008The minisuperspace model in $3+d$ spatial dimensions with the matter, described by the bag model, is considered with the aim to estimate the probability of creation of the compactified extra dimensions in nuclear collisions. The amplitude of transition ... More
Geometry and space-time extent of pion emission region at FCC energiesJul 07 2016Aug 08 2016The energy dependence is investigated for a wide set of space-time characteristics derived from Bose - Einstein correlations of secondary pion pairs produced in proton-proton and nucleus-nucleus interactions. Analytic functions suggested for smooth approximations ... More
Hadronic contributions to electroweak observables within DPTSep 01 2015Dispersive approach to quantum chromodynamics is applied to the assessment of hadronic contributions to electroweak observables. The employed approach merges the corresponding perturbative input with intrinsically nonperturbative constraints, which originate ... More
Inclusive tau lepton decay: the effects due to hadronizationFeb 03 2013The inclusive tau lepton hadronic decay and its description within Dispersive approach to Quantum Chromodynamics are briefly discussed.
New Model for the QCD Analytic Running CouplingJun 27 2001As an elaboration of the analytic approach to Quantum Chromodynamics (QCD), a new model for the QCD analytic running coupling is proposed. A self-evident advantage of the new analytic running coupling (NARC) is that it incorporates the infrared enhancement ... More
On the low-energy behavior of the Adler functionAug 14 2008The infrared behavior of the Adler function is examined by making use of a recently derived integral representation for the latter. The obtained result for the Adler function agrees with its experimental prediction in the entire energy range. The inclusive ... More