System-Size Dependence of Statistical Behavior in Quantum System
Keiji Saito, Shinji Takesue, Seiji Miyashita
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.
Journal of the Physical Society of Japan•May 15, 1996•25 citations