Ground State of Quantum Spin Glass with Infinite Range Interactions

Hidetoshi Nishimori, Yoshihiro Taguchi, Takehiko Oguchi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


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 languageEnglish
Pages (from-to)656-659
Number of pages4
Journaljournal of the physical society of japan
Issue number2
Publication statusPublished - 1986

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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