187 citations · 2k across the 94 of their papers we have counts for
20 papers · 1 filter
Lyapunov decay in quantum irreversibility
Ignacio Garcia-Mata, Augusto J. Roncaglia, Diego A. Wisniacki
The Loschmidt echo -- also known as fidelity -- is a very useful tool to study irreversibility in quantum mechanics due to perturbations or imperfections. Many different regimes, a…
Universal wave functions structure in mixed systems
Diego A. Wisniacki
When a regular classical system is perturbed, non-linear resonances appear as prescribed by the KAM and Poincarè-Birkhoff theorems. Manifestations of this classical phenomena to th…
Perturbations and chaos in quantum maps
Darío E. Bullo, Diego A. Wisniacki
The local density of states (LDOS) is a distribution that characterizes the effect of perturbations on quantum systems. Recently, it was proposed a semiclassical theory for the LDO…
Loschmidt Echo
Arseni Goussev, Rodolfo A. Jalabert, Horacio M. Pastawski +1
In this article we review the past, present, and future of the Loschmidt Echo.
Semiclassical approach to fidelity amplitude
Ignacio García-Mata, Raúl O. Vallejos, Diego A. Wisniacki
The fidelity amplitude is a quantity of paramount importance in echo type experiments. We use semiclassical theory to study the average fidelity amplitude for quantum chaotic syste…
The Poincare-Birkhoff theorem in Quantum Mechanics
D. A. Wisniacki, M. Saraceno, F. J. Arranz +2
Quantum manifestations of the dynamics around resonant tori in perturbed Hamiltonian systems, dictated by the Poincaré--Birkhoff theorem, are shown to exist. They are embedded in t…