Zobrazeno 1 - 10
of 63
pro vyhledávání: '"Polishchuk, I. Ya."'
Modeling the motion of ultracold neutrons (UCNs) is crucial for assessing their losses, accurately measuring their lifetime, and describing other experiments. In material traps, it is necessary to account not only for specular but also for diffuse el
Externí odkaz:
http://arxiv.org/abs/2412.05106
Autor:
Babichenko, V. S., Polishchuk, I. Ya.
Properties of the ground state and the spectrum of elementary excitations are investigated for the low density ultracold spinor 3D Bose gas of particles with arbitrary nonzero spin. Gross-Pitaevskii equations are derived. Within the framework of the
Externí odkaz:
http://arxiv.org/abs/2101.03744
Autor:
Polishchuk, I. Ya., Gozman, M. I., Anastasiev, A. A., Polishchuk, Yu. I., Solov'ov, S. V., Tsyvkunova, E. A.
Publikováno v:
Phys. Rev. A 95, 053847 (2017)
It is known that for an isolated dielectric cylinder waveguide there exists the cutoff frequency $\omega_\ast$ below which there is no guided mode. It is shown in the paper that the infinite plane periodic array of such waveguides possesses the guide
Externí odkaz:
http://arxiv.org/abs/1701.04386
Autor:
Babichenko, V. S., Polishchuk, I. Ya.
Publikováno v:
Phys. Rev. B 94, 165304 (2016)
Many-component electron-hole plasma is considered in the Coupled Quantum Wells (CQW). It is found that the homogeneous state of the plasma is unstable if the carrier density is sufficiently small. The instability results in the breakdown into two coe
Externí odkaz:
http://arxiv.org/abs/1605.04748
Autor:
Babichenko, V. S., Gozman, M. I., Guseynov, A. I., Habarova, T. V., Pavlov, A. I., Stavcev, A. Yu., Tsyvkunova, E. A., Polishchuk, I. Ya
We investigate the optical beam behavior in the periodical array of the coupled optical waveguides with the monotonic change of the refractive index in the transverse direction. We consider the dependence of the form of the optical beam on the bounda
Externí odkaz:
http://arxiv.org/abs/1601.01826
The anharmonic Bloch oscillations of a light beam in the array of optical waveguides are considered. The coupling modes model (CMM) with the second order interaction is used to describe the effect analytically. The formula obtained predicts explicitl
Externí odkaz:
http://arxiv.org/abs/1501.06492
The Bloch oscillations in the zigzag array of the optical waveguides are considered. The multiple scattering formalism (MSF) is used for the numerical simulation of the optical beam which propagates within the array. The effect of the second-order co
Externí odkaz:
http://arxiv.org/abs/1501.06476
It is shown that the homogeneous state of the spatially separated electrons and holes in the coupled quantum wells (CQW) is instable if the layer charge density is smaller than the critical value specified by the parameters of the CQW. The effect is
Externí odkaz:
http://arxiv.org/abs/1412.6241
Autor:
Gozman, M. I., Polishchuk, I. Ya
The multiple scattering formalism is proposed describing the guided modes in the optical waveguide array within the framework of macroscopic electrodynamics. It is shown that, under sufficiently general assumptions, our approach justifies the phenome
Externí odkaz:
http://arxiv.org/abs/1310.5312
We consider a plane periodical array of parallel cylindrical waveguides with evanescent coupling between them. A new method for calculating the isofrequency curves based on the multiple Mie scattering formalism (MMSF) is developed. This method is com
Externí odkaz:
http://arxiv.org/abs/1302.0995