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Autor:
Ovchinnikov, Yu. N., Varlamov, A. A.
Publikováno v:
Phys. Rev. B 91, 014514 (2015)
The theory of current transport in a narrow superconducting channel accounting for thermal fluctuations is revisited. The value of voltage appearing in the sample is found as the function of temperature (close to transition temperature $T-T_{\mathrm{
Externí odkaz:
http://arxiv.org/abs/1408.3070
Publikováno v:
EPL (Europhysics Letters) 107 (2014) 37001
We consider two-dimensional (2D) "artificial atoms" confined by an axially symmetric potential $V(\rho)$. Such configurations arise in circular quantum dots and other systems effectively restricted to a 2D layer. Using the semiclassical method, we pr
Externí odkaz:
http://arxiv.org/abs/1312.0689
Publikováno v:
Physica D, v. 241, 1245-1254 (2012)
We consider the phenomenon of collapse in the critical Keller-Segel equation (KS) which models chemotactic aggregation of micro-organisms underlying many social activities, e.g. fruiting body development and biofilm formation. Also KS describes the c
Externí odkaz:
http://arxiv.org/abs/1110.6393
Autor:
Ovchinnikov, Yu. N., Varlamov, A. A.
The theory of current transport in a narrow superconducting channel accounting for thermal fluctuations is developed. These fluctuations result in the appearance of small but finite dissipation in the sample. The value of corresponding voltage is fou
Externí odkaz:
http://arxiv.org/abs/0910.2659
Autor:
Ovchinnikov, Yu. N., Sigal, I. M.
Publikováno v:
Physica D240:1311-1324,2011
We derive the universal collapse law of degree 1 equivariant wave maps (solutions of the sigma-model) from the 2+1 Minkowski space-time,to the 2-sphere. To this end we introduce a nonlinear transformation from original variables to blowup ones. Our f
Externí odkaz:
http://arxiv.org/abs/0909.3085
We study the phenomenon of macroscopic quantum tunneling (MQT) in a finite size Josephson junction (JJ) with an externally applied magnetic field. As it is well known, the problem of MQT in a point-like JJ is reduced to the study of the under-barrier
Externí odkaz:
http://arxiv.org/abs/0807.2800
We study the phenomenon of macroscopic quantum tunneling (MQT) in small Josephson junctions (JJ) with an externally applied magnetic field. The latter results in the appearance of the Fraunhofer type modulation of the current density along the barrie
Externí odkaz:
http://arxiv.org/abs/cond-mat/0701784
We present a new theoretical approach to describe the quantum behavior of a macroscopic system interacting with an external irradiation field, close to the resonant condition. Here we consider the extremely underdamped regime for a system described b
Externí odkaz:
http://arxiv.org/abs/quant-ph/0611255
Autor:
Kresin, Vitaly V., Ovchinnikov, Yu. N.
Publikováno v:
Phys. Rev. B 73, 115412 (2006)
Electron-phonon relaxation in size-quantized systems may become inhibited when the spacing of discrete electron energy levels exceeds the magnitude of the phonon frequency. We show, however, that nanoclusters can support a fast nonradiative relaxatio
Externí odkaz:
http://arxiv.org/abs/physics/0512222