Zobrazeno 1 - 10
of 21
pro vyhledávání: '"A. M. Bundaru"'
Autor:
M Bundaru, N Angelescu
Publikováno v:
Journal of Physics A: Mathematical and Theoretical. 40:5565-5573
An exactly solvable model for the particle transport between two reservoirs of non-interacting Bose particles through a microscopic tunnelling junction is studied. The analysis covers the whole range of temperatures and densities of the reservoirs, a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9bb164cbdf91ffafb90d7e170b6c9a77
https://doi.org/10.1088/1751-8113/40/21/008
https://doi.org/10.1088/1751-8113/40/21/008
Autor:
C. P. Grünfeld, M Bundaru
Publikováno v:
Journal of Physics A: Mathematical and General. 32:875-884
We prove the existence of an infinite-order phase transition for a semi-infinite, one-dimensional, non-homogeneous system of classical continuous spins, with long-range interactions and general a priori distribution.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16e244c7a941ec27d41437785a0b47fd
https://doi.org/10.1088/0305-4470/32/6/002
https://doi.org/10.1088/0305-4470/32/6/002
Publikováno v:
Journal of Physics A: Mathematical and General. 32:4571-4584
We point out that the generalized spherical model, as a limit of the isotropic n-vector model, inherits a natural separation into longitudinal and transverse spin projections with respect to the direction of the external field (or spontaneous magneti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d962528016ceca8e19041f8a6dbcb9b6
https://doi.org/10.1088/0305-4470/32/25/301
https://doi.org/10.1088/0305-4470/32/25/301
Publikováno v:
Journal of Mathematical Physics. 36:4774-4784
We consider the probability distribution in a classical semi‐infinite layered ferromagnet with mean‐field interactions and prove that this satisfies a large deviation principle, giving the rate function explicitly. For an analogous quantum system
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b22fd260f0477fa6ca29051abf2f3339
https://doi.org/10.1063/1.530919
https://doi.org/10.1063/1.530919
Autor:
N Angelescu, M Bundaru
Publikováno v:
Journal of Physics A: Mathematical and General. 27:1463-1469
The spin probability distribution at equilibrium in a multicomponent mean-field model of a ferromagnetic slab made of N rows is considered. Everywhere, but at the critical point, the spin fluctuations converge, as the number of spins pet row tends to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d8a74b54a2b424552ce01668fe8269ed
https://doi.org/10.1088/0305-4470/27/5/013
https://doi.org/10.1088/0305-4470/27/5/013
Publikováno v:
Physical Review B. 70
We treat the problem of self-consistently interacting bosons in the presence of a finite (but macroscopic) potential well within a quasi-classical approximation for the normal component and the order parameter. We solve the equilibrium problem and sh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2fdb62d21ae2f520fad391b19d0212a
https://doi.org/10.1103/physrevb.70.045201
https://doi.org/10.1103/physrevb.70.045201
Publikováno v:
Journal of Physics A: Mathematical and Theoretical. 44:495002
In this paper, we discuss the interference patterns which appear in the local particle-density and particle-current distributions of two infinite 2D lattice systems of free fermions which are allowed to communicate via two tunneling junction points.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e60442f67d818e86fa7eb5cadf290c10
https://doi.org/10.1088/1751-8113/44/49/495002
https://doi.org/10.1088/1751-8113/44/49/495002
Autor:
N Angelescu, M Bundaru
Publikováno v:
Journal of Physics A: Mathematical & Theoretical; May2007, Vol. 40 Issue 21, p5565-5573, 9p
Publikováno v:
Journal of Physics A: Mathematical and General. 22:L231-L236
The authors show that, in an n-vector model with anisotropy affecting the interactions within a finite-dimensional subspace of the spin space, non-analyticity of the free energy can appear in the spherical limit (n= infinity ) even in a finite system
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::19a67677ea242da557e6afa025cc96f3
https://doi.org/10.1088/0305-4470/22/6/008
https://doi.org/10.1088/0305-4470/22/6/008
Publikováno v:
Journal of Physics A: Mathematical and General. 12:2457-2473
The asymptotics of the state of the n-vector model with a finite number of spins in the spherical limit is studied. Besides re-deriving the limit of the free energy, corresponding to a generalised spherical model (with 'spherical constraint' at every
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9749166ff9e5c7316d089da58b4419b4
https://doi.org/10.1088/0305-4470/12/12/024
https://doi.org/10.1088/0305-4470/12/12/024