Abstract
The low-temperature behavior of the infinite-range Ising spin-glass model with a Gaussian distribution of interactions is studied by evaluating the statistical mechanics exactly for small systems (up to N=20 spins). Our results can be well understood by a simple picture of elementary cluster excitations from the ground state which overturn, on average, of order N12 spins. The conventional definition of the spin-glass order parameter is shown to be unsatisfactory and a new definition is proposed. It is speculated that ensemble averages may give different results from time averages for N even in the infinite time limit.
| Original language | English |
|---|---|
| Pages (from-to) | 440-451 |
| Number of pages | 12 |
| Journal | Physical Review B-Condensed Matter |
| Volume | 25 |
| Issue number | 1 |
| DOIs | |
| State | Published - 1982 |
| Externally published | Yes |
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