Physical review. E, Statistical, nonlinear, andâ€¦

2011

We study fidelity decay in classically chaotic microwave billiards for a local, pistonlike boundary perturbation. We experimentally verify a predicted nonmonotonic crossover from the Fermi goldenâ€¦ (More)

We address the decay in open chaotic quantum systems and calculate semiclassical corrections to the classical exponential decay. We confirm random matrix predictions and, going beyond, calculateâ€¦ (More)

It has recently been established that quantum statistics can play a crucial role in quantum escape. Here we demonstrate that boundary conditions can be equally important â€”moreover, in certain cases,â€¦ (More)

Physical review. E, Statistical, nonlinear, andâ€¦

2011

We study the short-time stability of quantum dynamics in quasi-one-dimensional systems with respect to small localized perturbations of the potential. To this end, we analytically and numericallyâ€¦ (More)

Echoes are ubiquitous phenomena in several branches of physics, ranging from acoustics, optics, condensed matter and cold atoms to geophysics. They are at the base of a number of very usefulâ€¦ (More)

Physical review. E, Statistical, nonlinear, andâ€¦

2009

The Loschmidt echo (LE) (or fidelity) quantifies the sensitivity of the time evolution of a quantum system with respect to a perturbation of the Hamiltonian. In a typical chaotic system the LE hasâ€¦ (More)

Physical review. E, Statistical, nonlinear, andâ€¦

2006

We consider the time evolution of a wave packet representing a quantum particle moving in a geometrically open billiard that consists of a number of fixed hard-disk or hard-sphere scatterers. Usingâ€¦ (More)