title: Thermal pure quantum states at finite temperature.
abstract: An equilibrium state can be represented by a pure quantum state, which we call a thermal pure quantum (TPQ) state. We propose a new TPQ state and a simple method of obtaining it. A single realization of the TPQ state suffices for calculating all statistical-mechanical properties, including correlation functions and genuine thermodynamic variables, of a quantum system at finite temperature.
authors.affiliation: Department of Basic Science, University of Tokyo, 3-8-1 Komaba, Meguro, Tokyo 153-8902, Japan. sugiura@ASone.c.u-tokyo.ac.jp
authors.forename: Sho
authors.initials: S
authors.lastname: Sugiura
authors.forename: Akira
authors.initials: A
authors.lastname: Shimizu