title: Quantum dissipation due to the interaction with chaos.
abstract: We discuss the possibility of having "quantum dissipation" due to the interaction with chaotic degrees of freedom. We define the conditions that should be satisfied in order to have a dissipative effect similar to the one due to an interaction with a (many body) bath. We also compare with the case where the environment is modeled by a random matrix model. In the case of interaction with "chaos" we observe a regime where the relaxation process is nonuniversal and reflects the underlaying semiclassical dynamics. As an example we consider a two level system (spin) that interacts with a two-dimensional anharmonic oscillator.
authors.affiliation: Department of Physics, Ben-Gurion University, Beer-Sheva 84105, Israel.
authors.forename: Doron
authors.initials: D
authors.lastname: Cohen
authors.forename: Tsampikos
authors.initials: T
authors.lastname: Kottos