Zobrazeno 1 - 10
of 266
pro vyhledávání: '"Tsekov, Roumen"'
Autor:
Tsekov, Roumen
Trailing the modern ideas of sociophysics, a minimalistic thermodynamic model of society is proposed, which consists of three social ingredients: people, economy, and entropy. Employing the universal van der Waals equation of state, many important re
Externí odkaz:
http://arxiv.org/abs/2307.05984
Autor:
Tsekov, Roumen
Publikováno v:
C. R. Acad. Bulg. Sci. 76 (2023) 1343-1349
Advanced thermostats for molecular dynamics are proposed on the base of the rigorous Langevin dynamics. Because the latter accounts for the subsystem-bath interactions in details, the bath anisotropy and nonuniformity are described via the relevant f
Externí odkaz:
http://arxiv.org/abs/2205.06608
Autor:
Tsekov, Roumen
Publikováno v:
Fluct. Noise Lett. 21 (2022) 2250024
The Schrodinger equation is solved for many free particles and their quantum entanglement is studied via correlation analysis. Converting the Schrodinger equation in the Madelung hydrodynamic-like form, the quantum mechanics is extended to open quant
Externí odkaz:
http://arxiv.org/abs/2106.09356
Autor:
Tsekov, Roumen
In the frames of classical mechanics the generalized Langevin equation is derived for an arbitrary mechanical subsystem coupled to the harmonic bath of a solid. A time-acting temperature operator is introduced for the quantum Klein-Kramers and Smoluc
Externí odkaz:
http://arxiv.org/abs/2105.05646
Autor:
Tsekov, Roumen
Publikováno v:
Fluct. Noise Lett. 20 (2021) 2130004
A nonlinear master equation is derived, reflecting properly the entropy of open quantum systems. In contrast to linear alternatives, its equilibrium solution is exactly the canonical Gibbs density matrix. The corresponding nonlinear equation for the
Externí odkaz:
http://arxiv.org/abs/2010.06381
Autor:
Tsekov, Roumen
Publikováno v:
Fluct. Noise Lett. 20 (2021) 2150009
It is demonstrated how quantum mechanics is generated by stochastic momentum kicks from the force carriers, transmitting the fundamental interactions between the point particles. The picture is consistent with quantum field theory and points out that
Externí odkaz:
http://arxiv.org/abs/2001.08119
Autor:
Tsekov, Roumen
Publikováno v:
Fluct. Noise Lett. 19 (2020) 2050017
A theoretical parallel between the classical Brownian motion and quantum mechanics is explored. It is shown that, in contrast to the classical Langevin force, quantum mechanics is driven by turbulent velocity fluctuations with diffusive behavior. In
Externí odkaz:
http://arxiv.org/abs/1902.05930
Publikováno v:
C. R. Acad. Bulg. Sci. 72 (2019) 448-454
A stochastic Euler equation is proposed, describing the motion of a particle density, forced by the random action of virtual photons in vacuum. After time averaging, the Euler equation is reduced to the Reynolds equation, well studied in turbulent hy
Externí odkaz:
http://arxiv.org/abs/1804.00395
Publikováno v:
Fluct. Noise Lett. 16, 1750028 (2017)
We regard the non-relativistic Schrodinger equation as an ensemble mean representation of the stochastic motion of a single particle in a vacuum, subject to an undefined stochastic quantum force. The local mean of the quantum force is found to be pro
Externí odkaz:
http://arxiv.org/abs/1706.04755
Autor:
Tsekov, Roumen
Publikováno v:
New Adv. Phys. 13 (2019) 1-12
The quantum Schrodinger-Newton equation is solved for a self-gravitating Bose gas at zero temperature. It is derived that the density is non-uniform and a central hollow cavity exists. The radial distribution of the particle momentum is uniform. It i
Externí odkaz:
http://arxiv.org/abs/1705.08249