Abstract
We have investigated the spin-1/2 random Heisenberg model with infinite range interactions by a numerical method. Extrapolation of finite size (N ≦ 16) properties to the infinite system has yielded the following results. The average ground state energy is lower than that of the SK model (Ising spin) by about 25%. In the ground state, a critical point between the spin glass and ferromagnetic (mixed) phases exists just around the critical point [formula omitted] of the corresponding classical random Heisenberg model. Quantum fluctuations are concluded not to change the ground state properties qualitatively.
| Original language | English |
|---|---|
| Pages (from-to) | 656-659 |
| Number of pages | 4 |
| Journal | journal of the physical society of japan |
| Volume | 55 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1986 |
ASJC Scopus subject areas
- Physics and Astronomy(all)