9 citations · 30 across the 5 of their papers we have counts for
8 papers
Landau-Zener and Rabi oscillations in the spin-dependent conductance
Lucas J. Fernández-Alcázar, Horacio M. Pastawski
We describe the spin-dependent quantum conductance in a wire where a magnetic field is spatially modulated. The change in direction and intensity of the magnetic field acts as a pe…
Exact time-reversal focusing of acoustic and quantum excitations in open cavities: The perfect inverse filter
Hernan L. Calvo, Horacio M. Pastawski
The time-reversal mirror (TRM) prescribes the reverse playback of a signal to focalize an acoustic excitation as a Loschmidt echo. In the quantum domain, the perfect inverse filter…
Survival Probability of a Local Excitation in a Non-Markovian Environment: Survival Collapse, Zeno and Anti-Zeno effects
E. Rufeil Fiori, H. M. Pastawski
The decay dynamics of a local excitation interacting with a non-Markovian environment, modeled by a semi-infinite tight-binding chain, is exactly evaluated. We identify distinctive…
Survival probability of surface excitations in a 2d lattice: non-Markovian effects and Survival Collapse
E. Rufeil Fiori, H. M. Pastawski
The evolution of a surface excitation in a two dimentional model is analyzed. I) It starts quadratically up to a spreading time t_{S}. II) It follows an exponential behavior govern…
Dynamical phase transition in vibrational surface modes
H. L. Calvo, H. M. Pastawski
We consider the dynamical properties of a simple model of vibrational surface modes. We obtain the exact spectrum of surface excitations and discuss their dynamical features. In ad…
Dynamical Origin of Decoherence in Clasically Chaotic Systems
F. M. Cucchietti, H. M. Pastawski, R. Jalabert
The decay of the overlap between a wave packet evolved with a Hamiltonian H and the same state evolved with H}+ serves as a measure of the decoherence time . Recent experim…