Zobrazeno 1 - 10
of 144
pro vyhledávání: '"Khomeriki, Ramaz"'
Publikováno v:
Phys. Rev. E 101, 030102 (2020)
We study dipolarly coupled three dimensional spin systems in both the microcanonical and the canonical ensembles by introducing appropriate numerical methods to determine the microcanonical temperature and by realizing a canonical model of heat bath.
Externí odkaz:
http://arxiv.org/abs/2001.03748
Autor:
Chendjou, Gervais Nazaire Beukam, Nguenang, Jean Pierre, Trombettoni, Andrea, Dauxois, Thierry, Khomeriki, Ramaz, Ruffo, Stefano
Publikováno v:
Journal of Statistical Mechanics Theory and Experiment 2019(10):104015
We study analytical solutions of the Fractional Boussinesq Equation (FBE), which is an effective model for the Fermi-Pasta-Ulam (FPU) one-dimensional lattice with long-range couplings. The couplings decay as a power-law with exponent s, with 1 < s <
Externí odkaz:
http://arxiv.org/abs/1909.13799
Autor:
Miloshevich, George, Nguenang, Jean Pierre, Dauxois, Thierry, Khomeriki, Ramaz, Ruffo, Stefano
Publikováno v:
Journal of Physics A: Mathematical and Theoretical 50.12 (2017)
We investigate the existence and propagation of solitons in a long-range extension of the quartic Fermi-Pasta-Ulam (FPU) chain of anharmonic oscillators. The coupling in the linear term decays as a power-law with an exponent greater than 1 and less t
Externí odkaz:
http://arxiv.org/abs/1611.05350
Autor:
Loladze, Vazha, Khomeriki, Ramaz
Publikováno v:
Phys. Rev. E 95, 042204 (2017)
A simple mechanical analog describing Landau-Zener tunneling effect is proposed using two weakly coupled chains of nonlinear oscillators with gradually decreasing (first chain) and increasing (second chain) masses. The model allows to investigate non
Externí odkaz:
http://arxiv.org/abs/1608.01926
Autor:
Flach, Sergej, Khomeriki, Ramaz
We consider the dynamics of noninteracting electrons on a square lattice in the presence of a magnetic flux {\alpha} and a dc electric field E oriented along the lattice diagonal. In general, the adiabatic dynamics of an electron will be characterize
Externí odkaz:
http://arxiv.org/abs/1606.03703
Autor:
Khomeriki, Ramaz, Flach, Sergej
Publikováno v:
Phys. Rev. Lett. 116, 245301 (2016)
Sinusoidal Bloch oscillations appear in band structures exposed to external fields. Landau-Zener (LZ) tunneling between different bands is usually a counteracting effect limiting Bloch oscillations. Here we consider a flat band network with two dispe
Externí odkaz:
http://arxiv.org/abs/1602.08691
All-phononic Digital Transistor on the Basis of Gap-Soliton Dynamics in Anharmonic Oscillator Ladder
Autor:
Malishava, Merab, Khomeriki, Ramaz
Publikováno v:
Phys. Rev. Lett. 115, 104301 (2015)
A conceptual mechanism of amplification of phonons by phonons on the basis of nonlinear band-gap transmission (supratransmission) phenomenon is presented. As an example a system of weakly coupled chains of anharmonic oscillators is considered. One (s
Externí odkaz:
http://arxiv.org/abs/1509.00679
Autor:
Jandieri, Vakhtang, Khomeriki, Ramaz
Publikováno v:
Photonics Technology Letters, IEEE, 27 , 639 (2015)
We introduce a weakly coupled photonic crystal waveguide as a promising and realistic model for all-optical amplification. A symmetric pillar type coupled photonic crystal waveguide consisting of dielectric rods periodically distributed in a free spa
Externí odkaz:
http://arxiv.org/abs/1503.04399
Autor:
Jandieri, Vakhtang, Khomeriki, Ramaz
All-optical amplification of the light pulse in a weakly coupled two nonlinear photonic crystal waveguides (PCWs) is proposed. We consider pillar-type PCWs, which consist of the periodically distributed circular rods made from a Kerr-type dielectric
Externí odkaz:
http://arxiv.org/abs/1503.04336
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