Ground states for a class of deterministic spin models with glassy behaviour

Details Ground states for a class of deterministic spin models with glassy behaviour Ground states for a class of deterministic spin models with glassy behaviour

1995-11-03

arxiv.org/abs/cond-mat/9511019v1

Physics

Condensed Matter

15 pages, plain LaTex

Scientific paper

10.1088/0305-4470/29/8/008

We consider the deterministic model with glassy behaviour, recently introduced by Marinari, Parisi and Ritort, with \ha\ $H=\sum_{i,j=1}^N J_{i,j}\sigma_i\sigma_j$, where $J$ is the discrete sine Fourier transform. The ground state found by these authors for $N$ odd and $2N+1$ prime is shown to become asymptotically dege\-ne\-ra\-te when $2N+1$ is a product of odd primes, and to disappear for $N$ even. This last result is based on the explicit construction of a set of eigenvectors for $J$, obtained through its formal identity with the imaginary part of the propagator of the quantized unit symplectic matrix over the $2$-torus.

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