Condensed Matter Seminar Series
Fidelity Decay Induced by a Complex Environment
Ciao Lewenkopf
UERJ (Rio de Janeiro, Brasil)
Thursday September 4, 1h30 pm, Room 234, Physics Building
Host: Eduardo Mucciolo
Abstract:
The time evolution of the overlap between two wave packets
prepared at the same initial state, but evolving under slightly
different Hamiltonians, is discussed. This overlap is closely
related to the fidelity. In general the overlap decays exponentially
with time for chaotic systems, while non-universal for integrable
ones. We discuss the characteristic decay times for different
and typical perturbations strengths giving couple of examples.