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Showing 2004Show all

300 papers · 1 filter

physics.ao-ph2004★ 4 cited

Ray-based description of normal mode amplitudes in a range-dependent waveguide

A. L. Virovlyansky, A. Yu. Kazarova, L. Ya. Lyubavin

An analogue of the geometrical optics for description of the modal structure of a wave field in a range-dependent waveguide is considered. In the scope of this approach the mode am…

cond-mat.supr-con2004★ 1 cited

Depinning at the initial stage of the resistive transition in superconductors with a fractal cluster structure

Yuriy I. Kuzmin

Depinning of vortices in percolative superconductor containing fractal clusters of a normal phase is considered. Transition of the superconductor into a resistive state corresponds…

cond-mat.str-el2004★ 6 cited

The evolution with temperature of magnetic polaron state in an antiferromagnetic chain with impurities

A. O. Sboychakov, A. L. Rakhmanov, K. I. Kugel +3

The thermal behavior of a one-dimensional antiferromagnetic chain doped by donor impurities was analyzed. The ground state of such a chain corresponds to the formation of a set of…

cond-mat.mes-hall2004★ 29 cited

Entanglement and quantum state engineering in the optically driven two-electron double-dot structure

Alexander V. Tsukanov

We study theoretically the quantum dynamics of two interacting electrons in the symmetric double-dot structure under the influence of the bichromatic resonant pulse. The state vect…

nlin.PS2004★ 45 cited

Analytic model for a frictional shallow-water undular bore

G. A. El, R. H. J. Grimshaw, A. M. Kamchatnov

We use the integrable Kaup-Boussinesq shallow water system, modified by a small viscous term, to model the formation of an undular bore with a steady profile. The description is ma…

nlin.PS2004

Wave breaking and the generation of undular bores in an integrable shallow-water system

G. A. El, R. H. J. Grimshaw, A. M. Kamchatnov

The generation of an undular bore in the vicinity of a wave-breaking point is considered for the integrable Kaup-Boussinesq shallow water system. In the framework of the Whitham mo…

math-ph2004★ 53 cited

Square ice, alternating sign matrices and classical orthogonal polynomials

F. Colomo, A. G. Pronko

The six-vertex model with Domain Wall Boundary Conditions, or square ice, is considered for particular values of its parameters, corresponding to 1-, 2-, and 3-enumerations of Alte…

hep-th2004★ 16 cited

Real-Time Instantons and Suppression of Collision-Induced Tunneling

D. Levkov, S. Sibiryakov

We consider tunneling processes in QFT induced by collisions of elementary particles. We propose a semiclassical method for estimating the probability of these processes in the lim…

astro-ph2004★ 1 cited

Multi-frequency imaging in VLBI

S. Likhachev

The new technique, multi-frequency imaging (MFI) is developed. In VLBI, Multi-Frequency Imaging (MFI) consists of multi-frequency synthesis (MFS) and multi-frequency analysis (MFA)…

astro-ph2004★ 13 cited

Infrared luminosities of galaxies in the Local Volume

I. D. Karachentsev, A. M. Kut'kin

Near-infrared properties of 451 galaxies with distances D \leq 10 Mpc are considered basing on the all-sky two micron survey (2MASS). A luminosity function of the galaxies in the K…

quant-ph2004★ 78 cited

Spontaneous emission of a photon: wave packet structures and atom-photon entanglement

M. V. Fedorov, M. A. Efremov, A. E. Kazakov +3

Spontaneous emission of a photon by an atom is described theoretically in three dimensions with the initial wave function of a finite-mass atom taken in the form of a finite-size w…

astro-ph2004★ 20 cited

Dynamics of the Flows Accreting onto a Magnetized Neutron Star

A. M. Bykov, A. M. Krassilchtchikov

Non-stationary column accretion onto a surface of a magnetized neutron star is studied with a numerical code based on modified first-order Godunov method with splitting. Formation…

cond-mat.mtrl-sci2004★ 247 cited

Space-Time Parity Violation and Magnetoelectric Interactions in Antiferromagnets

A. M. Kadomtseva, A. K. Zvezdin, Yu. F. Popov +2

The properties of antiferromagnetic materials with violated space-time parity are considered. Particular attention is given to the bismuth ferrite BiFeO3 ferroelectric magnet. This…

physics.flu-dyn2004★ 23 cited

Exact solutions for equilibrium configurations of charged conducting liquid jets

N. M. Zubarev, O. V. Zubareva

A wide class of exact solutions is obtained for the problem of finding the equilibrium configurations of charged jets of a conducting liquid; these configurations correspond to the…

physics.flu-dyn2004★ 1 cited

Equilibrium Configurations of the Charged Surface of a Conducting Liquid at a Finite Interelectrode Distance

N. M. Zubarev, O. V. Zubareva

The problem of determining equilibrium configurations of the free surface of a conducting liquid is considered with allowance for a finite interelectrode distance. The analogy is e…

hep-th2004

Spinning particle, rotating black hole and twistor-string

A. Burinskii

Structure of spinning particle based on the rotating black hole solution is considered. It has gyromagnetic ratio and a nontrivial twistorial and stringy systems. The mass an…

hep-ex2004★ 6 cited

Peculiarities in produced particles emission in 208Pb + Ag(Br) interactions at 158 A GeV/c

S. Vokal, A. Vokalova, A. Kravcakova +2

The angular structures of particles produced in 208Pb induced collisions with Ag(Br) nuclei in an emulsion detector at 158 A GeV/c have been investigated. Nonstatistical ring-like…

hep-ph2004★ 52 cited

Two-Loop Static QCD Potential for General Colour State

B. A. Kniehl, A. A. Penin, Y. Schröder +2

In this letter, we extend the known results for the QCD potential between a static quark and its antiquark by computing the two-loop corrections to the colour-octet state.

cond-mat.mes-hall2004★ 8 cited

Transitions between "" and "0" states in superconductor -- ferromagnet -- superconductor junctions

N. M. Chtchelkatchev

Experimental and theoretical study of superconductor (S) -- ferromagnet (F) -- superconductor junctions showed that in certain range of parameters (e.g., the length of the ferromag…

cond-mat.other2004★ 11 cited

High frequency magnetic permeability of nanocomposite film

N. A. Buznikov, I. T. Iakubov, A. L. Rakhmanov +1

The high frequency magnetic permeability of nanocomposite film consisting of the single-domain spherical ferromagnetic particles in the dielectric matrix is studied. The permeabili…

physics.atom-ph2004★ 60 cited

Comparison of discharge lamp and laser pumped cesium magnetometers

S. Groeger, A. S. Pazgalev, A. Weis

We have performed a comparison of laser (LsOPM) and lamp (LpOPM) pumped cesium vapor magnetometers. Although the LsOPM operated 50% above its shot-noise limit we found an intrinsic…

cond-mat.supr-con2004★ 26 cited

Metal-to-insulator crossover and pseudogap in single-layer compound BiSrCuO single crystals in high magnetic fields

S. I. Vedeneev, D. K. Maude

The in-plane and the out-of-plane magneto-transport in magnetic fields up to 28 T has been investigated in a series of high quality, single crystal, hole-doped…

quant-ph2004★ 61 cited

Observation of Nonspreading Wave Packets in an Imaginary Potential

R. Stuetzle, M. C. Goebel, T. Hoerner +8

We propose and experimentally demonstrate a method to prepare a nonspreading atomic wave packet. Our technique relies on a spatially modulated absorption constantly chiseling away…

quant-ph2004★ 14 cited

Dynamics of Two-Level System Interacting with Random Classical Field

G. B. Lesovik, A. V. Lebedev, A. O. Imambekov

The dynamics of a particle interacting with random classical field in a two-well potential is studied by the functional integration method. The probability of particle localization…