Irreversibility of many-body harmonic oscillators characterized by generalized Husimi's adiabaticity parameter

Kyosuke Watanabe, Yuki Izumida

In a classical paper [K. Husimi, Prog. Theor. Phys. 9, 381 (1953)], Husimi showed that, for a single harmonic oscillator with a time-dependent angular frequency and initial conditi…