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 |
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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)