System-Size Dependence of Statistical Behavior in Quantum System

Keiji Saito, Shinji Takesue, Seiji Miyashita

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


We discuss in detail statistical mechanical properties of quantum dynamics with the use of numerical simulations of isolated one-dimensional spin systems of various sizes. With respect to the energy distribution in a subsystem, a good agreement is observed between those obtained by the method of statistical mechanics and via long-time average over simulation, even in the system composed of a small number of spins. In particular, the distribution of energy forms the canonical distribution.

Original languageEnglish
Pages (from-to)1243-1249
Number of pages7
JournalJournal of the Physical Society of Japan
Issue number5
Publication statusPublished - 1996
Externally publishedYes


  • Ergodicity
  • Few degrees of freedom
  • Quantum mechanical motion
  • Quantum spin system
  • Statistical mechanical properties
  • The canonical distribution

ASJC Scopus subject areas

  • General Physics and Astronomy


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