266 citations · 878 across the 15 of their papers we have counts for
6 papers · 1 filter
Effective one-body dynamics in multiple-quantum NMR experiments
E. Rufeil Fiori, C. M. Sanchez, F. Y. Oliva +2
A suitable NMR experiment in a one-dimensional dipolar coupled spin system allows one to reduce the natural many-body dynamics into effective one-body dynamics. We verify this in a…
Dynamical regimes of a quantum swap gate beyond the Fermi Golden Rule
Axel D. Dente, Raul A. Bustos-Marun, Horacio M. Pastawski
We discuss how the bath's memory affects the dynamics of a swap gate. We present an exactly solvable model that shows various dynamical transitions when treated beyond the Fermi Go…
Comment on "Nonexponential Decay Via Tunneling in Tight-Binding Lattices and the Optical Zeno Effect"
E. Rufeil Fiori, H. M. Pastawski
S. Longhi [1] studied the survival probability P(t) of an unstable state coupled to a tight-binding lattice finding an exact analytical solution that describes the nonexponential d…
Quantum parallelism as a tool for ensemble spin dynamics calculations
Gonzalo A. Alvarez, Ernesto P. Danieli, Patricia R. Levstein +1
Efficient simulations of quantum evolutions of spin-1/2 systems are relevant for ensemble quantum computation as well as in typical NMR experiments. We propose an efficient method…
Decay of the Loschmidt echo in a time-dependent environment
Fernando M. Cucchietti, Caio H. Lewenkopf, Horacio M. Pastawski
We study the decay rate of the Loschmidt echo or fidelity in a chaotic system under a time-dependent perturbation with typical strength . The perturbation rep…
Non-Markovian decay beyond the Fermi Golden Rule: Survival Collapse of the polarization in spin chains
E. Rufeil Fiori, H. M. Pastawski
The decay of a local spin excitation in an inhomogeneous spin chain is evaluated exactly: I) It starts quadratically up to a spreading time t_{S}. II) It follows an exponential beh…