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quant-ph2008★ 51 cited
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…
quant-ph2007★ 1 cited
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…
quant-ph2005
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…