Effect of Rare Fluctuations on the Thermalization of Isolated Quantum Systems
Effect of Rare Fluctuations on the Thermalization of Isolated Quantum Systems
We consider the question of thermalization for isolated quantum systems after a sudden parameter change, a so-called quantum quench. In particular, we investigate the prerequisites for thermalization, focusing on the statistical properties of the time-averaged density matrix and of the expectation values of observables in the final eigenstates. We find …