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Peculiarities of Alfven wave propagation along a nonuniform magnetic flux tube / N. V. Erkaev [et al.] // Phys. Plasmas. - 2005. - Vol. 12, Is. 1. - Ст. 12905, DOI 10.1063/1.1833392. - Cited References: 18 . - ISSN 1070-664X

РУБ Physics, Fluids & Plasmas
Рубрики:
HYDROMAGNETIC-WAVES
   TRANSFER EVENTS
   FIELD
   SLOW
Кл.слова (ненормированные):
Algebra -- Approximation theory -- Boundary conditions -- Electric conductivity -- Electric field effects -- Integral equations -- Magnetic flux -- Magnetohydrodynamics -- Perturbation techniques -- Polarization -- Vectors -- Velocity measurement -- Alfven wave propagation -- Axial symmetry -- Magnetic flux tubes -- Magnetosonic pulses -- Wave propagation
Аннотация: Within the framework of the assumption of large azimuthal wave numbers, the equations for Alfven and slow magnetosonic waves are obtained using frozen-in material coordinates. These equations are specified for the case of a nonuniform magnetic field with axial symmetry. Assuming a meridional polarization of the magnetic field and velocity perturbations, the effects of Alfven wave propagation are analyzed which are related to geometric characteristics of a nonuniform magnetic field: (a) A finite curvature radius of the magnetic field lines and (b) convergence of magnetic field lines. The interaction between the Alfven and magnetosonic waves is found to be strongly dependent on the curvature radius of the magnetic tube and the local plasma beta parameter. The electric field amplitude and the length scale of a wave front are found to increase very strongly in the course of the Alfven wave propagation along a converging magnetic flux tube. Also studied is a temporal decrease of the wave perturbations which is caused by dissipation at the conducting boundary. (C) 2005 American Institute of Physics.

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Держатели документа:
Russian Acad Sci, Inst Computat Modelling, Krasnoyarsk 660036, Russia
Krasnoyarsk State Univ, Krasnoyarsk 660041, Russia
St Petersburg State Univ, Inst Phys, St Petersburg 198504, Russia
Austrian Acad Sci, Inst Space Res, A-8042 Graz, Austria
ИВМ СО РАН
Intitute of Computational Modelling, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
State University of Krasnoyarsk, Krasnoyarsk 660041, Russian Federation
Institute of Physics, State University, St. Petersburg 198504, Russian Federation
Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, A-8042 Graz, Austria

Доп.точки доступа:
Erkaev, N. V.; Еркаев, Николай Васильевич; Shaidurov, V. A.; Semenov, V. S.; Langmayr, D.; Biernat, H. K.
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Isotope velocity differentiation in thin carbon nanotubes through quantum diffusion / A. S. Fedorov [et al.] // Europhys. Lett. - 2003. - Vol. 63, Is. 2. - P. 254-260, DOI 10.1209/epl/i2003-00512-5. - Cited References: 17 . - ISSN 0295-5075

РУБ Physics, Multidisciplinary
Рубрики:
MOLECULAR-DYNAMICS
   TRANSITIONS
   TRANSPORT
   ENERGY
Аннотация: An approach is proposed to evaluate the average velocities of adsorbate molecules in one-dimensional nanopore, when quantum tunneling between neighboring potential minima leads to nonzero velocity. The approach is used to calculate the hydrogen isotope molecule (H-2, D-2, T-2) velocities in ultrathin carbon single-wall nanotubes (SWNT) (3, 3) and (6, 0). It is shown that the isotope mass difference leads to large differences of the quantum tunneling value and large differences of the average molecule velocities, especially inside the tube (6, 0). It is shown that different tube chirality leads to drastically different velocities of adsorbate molecules, even if the diameters of both nanotubes do not differ significantly.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Kirenski Inst Phys, Krasnoyarsk 660036, Russia
Univ Vienna, Inst Mat Phys, Vienna, Austria
ИФ СО РАН
Kirenski Institute of Physics, Siberian Branch, Russian Academy of Science, Krasnoyarsk 660036, Russian Federation
Institut fur Materialphysik, Universitat Wien, Wien, Austria

Доп.точки доступа:
Fedorov, A. S.; Федоров, Александр Семенович; Avramov, P. V.; Аврамов, Павел Вениаминович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Kresse, G.
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Vasil'ev, E. N.
Numerical simulation of interaction between arc discharge and transverse magnetic field / E. N. Vasil'ev, D. A. Nesterov // High Temp. - 2007. - Vol. 45, Is. 2. - P. 137-142, DOI 10.1134/S0018151X07020010. - Cited References: 12 . - ISSN 0018-151X

РУБ Physics, Applied

Кл.слова (ненормированные):
Flow of gases -- Gas dynamics -- Mathematical models -- Molecular interactions -- Velocity distribution -- Arc discharges -- Discharge column -- Magnetogasdynamics -- Magnetic fields
Аннотация: An unsteady-state three-dimensional numerical model of radiation magnetogasdynamics is used to calculate the structure of an arc discharae which interacts with an external transverse maonetic field and transverse gas flow. The velocity field and the distribution of gas temperature obtained as a result of calculations agree with experimental data. The difference between the calculated and measured values of temperature in the discharge column is approximately 5%.

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Держатели документа:
Russian Acad Sci, Siberian Div, Inst Computat Modeling, Krasnoyarsk 660036, Russia
ИВМ СО РАН
Institute of Computational Modeling, Siberian Division, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Nesterov, D. A.; Васильев, Евгений Николаевич
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Erkaev, N. V.
Magnetic double-gradient instability and flapping waves in a current sheet / N. V. Erkaev, V. S. Semenov, H. K. Biernat // Phys. Rev. Lett. - 2007. - Vol. 99, Is. 23. - Ст. 235003, DOI 10.1103/PhysRevLett.99.235003. - Cited References: 10 . - ISSN 0031-9007

РУБ Physics, Multidisciplinary
Рубрики:
MAGNETOTAIL CURRENT SHEET
CLUSTER
Кл.слова (ненормированные):
Magnetic fields -- Magnetic properties -- Magnetohydrodynamics -- Velocity measurement -- Current sheets -- Flapping waves -- Magnetic gradients -- Stable regions -- Electromagnetic waves
Аннотация: A new kind of magnetohydrodynamic instability and waves are analyzed for a current sheet in the presence of a small normal magnetic field component varying along the sheet. These waves and instability are related to the existence of two gradients of the tangential (B(tau)) and normal (B(n)) magnetic field components along the normal (del(n)B(tau)) and tangential (del(tau)B(n)) directions with respect to the current sheet. The current sheet can be stable or unstable if the multiplication of two magnetic gradients is positive or negative. In the stable region, the kinklike wave mode is interpreted as so-called flapping waves observed in Earth's magnetotail current sheet. The kink wave group velocity estimated for the Earth's current sheet is of the order of a few tens of kilometers per second. This is in good agreement with the observations of the flapping motions of the magnetotail current sheet.

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Держатели документа:
Russian Acad Sci, Inst Computat Modelling, Krasnoyarsk, Russia
Siberian Fed Univ, Krasnoyarsk, Russia
St Petersburg State Univ, Inst Phys, St Petersburg, Russia
Austrian Acad Sci, Space Res Inst, A-8010 Graz, Austria
Graz Univ, Inst Phys, Graz, Austria
ИВМ СО РАН
Institute of Computational Modelling, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Institute of Physics, State University of St. Petersburg, St. Petersburg, Russian Federation
Space Research Institute, Austrian Academy of Sciences, Graz, Austria
Institute of Physics, University of Graz, Graz, Austria

Доп.точки доступа:
Semenov, V. S.; Biernat, H. K.; Еркаев, Николай Васильевич
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Korshunov, M. M.
LDA plus GTB (generalized tight-binding) method for the electronic structure calculations of strongly correlated electron systems: Application for the band structure calculations of p-type cuprates / M. M. Korshunov, S. G. Ovchinnikov // Physica C. - 2007. - Vol. 460: 8th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors (JUL 09-14, 2006, Dresden, GERMANY). - P. 1018-1019, DOI 10.1016/j.physc.2007.03.381. - Cited References: 12 . - ISSN 0921-4534

РУБ Physics, Applied
Рубрики:
3-CENTER INTERACTIONS
MODEL
Кл.слова (ненормированные):
strongly correlated electron systems -- superconductivity -- p-type cuprates -- spin fluctuations -- fermi surface -- Fermi surface -- p-Type cuprates -- Spin fluctuations -- Strongly correlated electron systems -- Superconductivity -- Band structure -- Correlation methods -- Electronic structure -- Fermi surface -- Hubbard model -- Mean field theory -- Spin fluctuations -- Superconductivity -- Fermi velocity -- Hole pockets -- Strongly correlated electron systems -- Oxide superconductors
Аннотация: Mean-field theory of the non-superconducting phase of the high-T-c cuprates is formulated within the effective t-t'-t"-J model with three-site correlated hoppings. This model with the ab initio calculated parameters results from the LDA + GTB method. The static spin and kinematical correlation functions beyond Hubbard I approximation are calculated self-consistently taking into account hoppings to the first, the second, and the third neighboring sites, as well as the three-site correlated hoppings. The obtained Fermi surface evolves from hole-pockets at low-doping to large hole-type Fermi surface at higher doping concentrations. Calculated doping dependence of the nodal Fermi velocity, the effective mass and the chemical potential shift are in good agreement with experimental data. (c) 2007 Elsevier B.V. All rights reserved.

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Держатели документа:
LV Kirenskii Inst Phys, Russian Acad Sci, Siberian Branch, Krasnoyarsk 660036, Russia
Max planck Int Phys Kimplexer Syst, D-01187 Dresden, Germany
ИФ СО РАН
L.V. Kirensky Institute of Physics, Siberian Branch of RAS, Akademgorodok, 660036 Krasnoyarsk, Russian Federation
Max-Planck-Institut fur Physik komplexer Systeme, Nothnitzer Str. 38, D-01187 Dresden, Germany

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Коршунов, Максим Михайлович
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Dissipative chaos in semiconductor superlattices / K. N. Alekseev [et al.] // Phys. Rev. B. - 1996. - Vol. 54, Is. 15. - P. 10625-10636, DOI 10.1103/PhysRevB.54.10625. - Cited References: 89 . - ISSN 0163-1829

РУБ Physics, Condensed Matter
Рубрики:
NEGATIVE DIFFERENTIAL CONDUCTIVITY
   INJECTED SIGNAL
   BLOCH OSCILLATIONS
   COLLECTIVE EXCITATIONS
   DETERMINISTIC CHAOS
   MINIBAND TRANSPORT
   SURFACE-PLASMONS
   TIME-SERIES
   LASER
   VELOCITY
Аннотация: We consider the motion of ballistic electrons in a miniband of a semiconductor superlattice (SSL) under the influence of an external, time-periodic electric field. We use a semiclassical, balance-equation approach, which incorporates elastic and inelastic scattering (as dissipation) and the self-consistent field generated by the electron motion. The coupling of electrons in the miniband to the self-consistent held produces a cooperative nonlinear oscillatory mode which, when interacting with the oscillatory external field and the intrinsic Bloch-type oscillatory mode, can lead to complicated dynamics, including dissipative chaos. For a range of values of the dissipation parameters we determine the regions in the amplitude-frequency plane of the external field in which chaos can occur. Our results suggest that for terahertz external fields of the amplitudes achieved by present-day free-electron lasers, chaos may be observable in SSL's. We clarify the nature of this interesting nonlinear dynamics in the superlattice-external-field system by exploring analogies to the Dicke model of an ensemble of two-level atoms coupled with a resonant cavity field, and to Josephson junctions.

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Держатели документа:
LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545
LV KIRENSKII INST PHYS,KRASNOYARSK 660036,RUSSIA
UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801
ИФ СО РАН

Доп.точки доступа:
Alekseev, K. N.; Berman, G. P.; Campbell, D. K.; Cannon, E. H.; Cargo, M. C.
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Plasmonics: Nonlinear optics, negative phase, and transformable transparency / A. K. Popov, S. A. Myslivets, V. M. Shalaev // Proceedings of SPIE - The International Society for Optical Engineering. - 2009. - Vol. 7395. - Ст. 73950Z, DOI 10.1117/12.824836 . - ISBN 0277786X (ISSN); 9780819476852 (ISBN)
Кл.слова (ненормированные):
Backward electromagnetic waves -- Negative-index metamaterials -- Optical parametric amplification -- Quantum control -- Backward electromagnetic waves -- Control fields -- Light wave -- Nanostructured composites -- Negative group velocity -- Negative phase -- Negative-index -- Negative-index metamaterials -- Optical energy transfer -- Optical parametric amplification -- Optical technique -- Plasmonic metamaterials -- Plasmonics -- Quantum control -- Cements -- Electromagnetic wave diffraction -- Electromagnetic wave scattering -- Electromagnetic waves -- Electromagnetism -- Energy transfer -- Light -- Metamaterials -- Nanophotonics -- Nonlinear optics -- Plasmons -- Transparency -- Amplification
Аннотация: The feasibilities and specific features of coherent nonlinear-optical energy transfer from control fields to a negativephase signal are studied, and they are found to stem from the backwardness of electromagnetic waves inherent to negative-index metamaterials. Plasmonic metamaterials that possess negative group velocity for light waves promise a revolutionary breakthrough in nanophotonics. However, strong absorption inherent to such metaldielectric nanocomposites imposes severe limitations on the majority of such applications. Herein we show the feasibility and discuss different nonlinear-optical techniques of compensating such losses, producing transparency, amplification and even generation of negative-phase light waves in originally strongly absorbing microscopic samples of plasmonic metal-dielectric nanostructured composites. © 2009 SPIE.

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Держатели документа:
University of Wisconsin-Stevens Point, 812 Kensington Rd., Neenah, WI 54956, United States
Siberian Federal University, Institute of Physics, Russian Academy of Sciences, 660036 Krasnoyarsk, Russian Federation
Birck Nanotechnology Center, School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN 47907, United States

Доп.точки доступа:
Popov, A.K.; Myslivets, S. A.; Мысливец, Сергей Александрович; Shalaev, V.M.; Plasmonics: Nanoimaging, Nanofabrication, and their Applications V(5 ; 2009 ; Aug. ; 2-6 ; San Diego, CA)
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Atomic current in optical lattices: Reexamination of the Esaki-Tsu equation / A. R. Kolovsky // Phys. Rev. A. - 2008. - Vol. 77, Is. 6. - P063604, DOI 10.1103/PhysRevA.77.063604. - Cited Reference Count: 13 . - JUN. - ISSN 1050-2947
Кл.слова (ненормированные):
Atomic physics -- Atoms -- Crystal lattices -- Optical materials -- Standards -- Systems analysis -- Velocity control -- American Physical Society (APS) -- Drift currents -- Master equations -- Optical lattices (OL) -- standard form -- Velocity distribution
Аннотация: This paper discusses the master equation approach to the derivation of the Esaki-Tsu equation for drift current. It is shown that the relaxation term in the master equation can be identified by measuring the velocity distribution of the carriers. We also show that the standard form of the relaxation term, used earlier to derive the Esaki-Tsu equation, predicts unphysical velocity distribution. We suggest a more elaborate relaxation term, which is argued to correctly capture the effect of a bosonic bath in experiments on atomic current in optical lattices.

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Kolovsky, A. R.; Коловский, Андрей Радиевич
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    Negative group velocity and three-wave mixing in dielectric crystals / M. I. Shalaev [et al.] // Opt. Lett. - 2011. - Vol. 36, Is. 19. - P. 3861-3863, DOI 10.1364/OL.36.003861. - Cited Reference Count: 15. - Гранты: This work was supported in part by the Russian Federal Program on Science, Education and Innovation under Grant No. 2010-121-102-018, by the Presidium of the Russian Academy of Sciences under Grant No. 27.1, by the Siberian Division of the Russian Academy of Sciences under Integration Project No. 5, and by the U.S. National Science Foundation (NSF) under Grant ECCS-1028353. - Финансирующая организация: Russian Federal Program on Science, Education and Innovation [2010-121-102-018]; Presidium of the Russian Academy of Sciences [27.1]; Siberian Division of the Russian Academy of Sciences [5]; U.S. National Science Foundation (NSF) [ECCS-1028353] . - ISSN 0146-9592
Рубрики:
INDEX METAMATERIALS
   PARAMETRIC AMPLIFICATION
   2ND-HARMONIC GENERATION
   OSCILLATOR
Кл.слова (ненормированные):
negative group velocity -- negative-index -- non-linear optical -- optical parametric amplification -- plasmonic -- three wave mixing -- electromagnetic waves -- electromagnetism -- metamaterials -- photonic devices -- light velocity
Аннотация: We investigate extraordinary features of optical parametric amplification of Stokes electromagnetic waves that originate from the three-wave mixing of a backward phonon wave with negative group velocity and two ordinary electromagnetic waves. Such properties were earlier shown to exist only in plasmonic negative-index metamaterials that are very challenging to fabricate. Nonlinear optical photonic devices with properties similar to those predicted for negative-index metamaterials are proposed. (C) 2011 Optical Society of America

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Держатели документа:
Univ Wisconsin, Stevens Point, WI 54481 USA
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Russian Acad Sci, Inst Phys, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Shalaev, M.I.; Slabko, V.V.; Myslivets, S. A.; Мысливец, Сергей Александрович; Popov, A.K.
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10.

The impact of cavitation-activated water on combustion dynamics and environmental characteristics of coal-water slurry fuel / O. P. Stebeleva [et al.] // IOP Conf. Ser.: Mater. Sci. Eng. - 2019. - Vol. 537: International Workshop on Advanced Technologies in Material Science, Mechanical and Automation Engineering - MIP: Engineering-2019 (4 April 2019 through 6 April 2019) Conference code: 149243, Is. 6. - Ст. 062056, DOI 10.1088/1757-899X/537/6/062056. - Cited References: 8
Рубрики:
Chemical, Ecological and Power Engineering
Кл.слова (ненормированные):
Angular velocity -- Cavitation -- Coal -- Conservation -- Dynamics -- Ecology -- Fuels -- Ignition -- Water treatment
Аннотация: Among the new coal technologies the burning of low-grade coal in the form of coal-water slurry fuel (CWSF) is of a great interest. The basis of CWSF is a highly concentrated coal-water slurry consisting of finely ground coal, water or other liquid and plasticizing agents. The development of CWSF technology is highly relevant for solving global problems of resource conservation and ecology. The study is dedicated to CWSF properties with respect to Kansk-Achinsk coal and water. This paper presents the results of the influence of CWSF's preliminary cavitation water treatment on the combustion dynamics of fuel, (including the features of the combustion temperature trends, delayed ignition time and time of complete combustion) and on its environmental characteristics. A rotary-type hydrodynamic oscillator at high angular velocity (10000 rpm) was used in supercavitation mode. It is shown that the technology of cavitation water treatment leads to a change in the dynamics of CWSF's combustion and to an additional decrease in NOx emissions by 1.6 times, CO2 by 1.3 times.

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Держатели документа:
Siberian Federal University, 79, Svobodnyy Ave, Krasnoyarsk, 660049, Russian Federation
Federal Research Center, Krasnoyarsk Scientific Center, Siberian Branch of the Russian Academy of Sciences, L.V. Kirensky Institute of Physics, SB RAS, 50 Akademgorodok, Krasnoyarsk, 660021, Russian Federation
National Research Tomsk Polytechnic University, Tomsk, 634050, Russian Federation

Доп.точки доступа:
Stebeleva, O. P.; Kashkina, L. V.; Petrakovskaya, E. A.; Петраковская, Элеонора Анатольевна; Nikitin, S. L.; Valiullin, T. R.; International Workshop on Advanced Technologies in Material Science, Mechanical and Automation Engineering(2019 ; April ; 4-6 ; Krasnoyarsk, Russian Federation)
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