Murtazaev, A. K. Ramazanov, M. K. Murtazaev, K. Sh. Magomedov, M. A. Badiev, M. K.
Published in
Physics of the Solid State

AbstractThe effect of an external magnetic field on the phase transitions and the thermodynamic and magnetic properties of the three-dimensional antiferromagnetic Ising model on a body-centered cubic lattice has been studied using a replica algorithm of the Monte Carlo method, taking into account the interactions of next nearest neighbors. A phase ...

Kryzhanovsky, B. Malsagov, M.
Published in
Optical Memory and Neural Networks

The spectra of spin models have been investigated in computation experiments. For the Sherrington-Kirkpatrick and Edwards-Anderson models we have determined the basic spectral characteristics: the average depth of a local minimum, the spectrum width, the depth of the global minimum. The experimental data are used to build the relations between thes...

Prataviera, G.A. Mizrahi, S.S.

A system of N spin-1/2 particles interacting with a thermal reservoir is used as a pedagogical example for advanced undergraduate and graduate students. We introduce and illustrate some methods, approximations, and phenomena related to dissipation and nonlinearity in many-particle physics. We start our analysis from the dynamical Sudarshan-Lindblad...

Hammar, Henning

Making spintronic devices is a hot topic for future technical development. In this work the non-equilibrium dynamics of a single spin in a tunnel junction is analyzed and numerically simulated. This is done in order to understand the dynamics of e.g. a magnetic molecule between two metal contacts for future spintronic devices. The work starts with ...

pra, paolo dai pavon, michele sahasrabudhe, neeraja

Deriving the form of the optimal solution of a maximum entropy problem, we obtain an infinite family of linear inequalities characterizing the polytope of spin correlation matrices. For n ≤ 6, the facet description of such a polytope is provided through a minimal system of Bell-type inequalities.

Sadovnikov, B. I. Inozemtseva, N. G. Inozemtsev, V. I.
Published in
Theoretical and Mathematical Physics

We construct the integrals of motion for Sutherland hyperbolic quantum systems of particles with internal degrees of freedom (su(n) spins) interacting with an external field of the Morse potential of an arbitrary strength τ2. These systems are confined if certain constraints are imposed on τ, the pair coupling constant λ, and the number of particle...

Shik, Hoi Yin Chen, Ru
Published in
Frontiers of Physics in China

A complete dimerized state exists for one kind of two-leg spin half ladders, which has local antiferromagnetic ordering and frustration effect at the same time. The system’s low-lying excitations can be obtained exactly which enables us to calculate thermodynamic quantities such as specific heat and magnetic susceptibility at low temperatures. Our ...

Zhang, Long He, WeiWei Liang, YongMin Cui, YuXin
Published in
Science in China Series B: Chemistry

While studying the electrophilic cyclization of acetylenic malonates in synthesizing malonate indene derivatives with high regio and stereo-selectivity, we found that the CH2 and CH3 protons of two COOCH2CH3 groups in some diethyl malonate indene derivatives showed very interesting spin-spin coupling and signal multiplicity. To explain those phenom...

Hu, Shuang-Wei Chen, Jing-Ling
Published in
International Journal of Theoretical Physics

In this work, we investigate the thermal entanglement for interacting spin systems \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$H=3(\vec{\sigma}_{1}\cdot\vec{n})(\ve...

Sire, Clément

We study the autocorrelation function of a conserved spin system following a quench at the critical temperature. Defining the correlation length L(t)\sim t^{1/z}, we find that for times t' and t satisfying L(t') = L(t')^{-(d-2+\eta)} [L(t')/L(t)]^{\lambda_c}. For the O(n) model in the n -> \infty limit, we show that \lambda_c=d+2 and \phi=z/2. We ...