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quant-ph2011★ 19 cited
An initial value representation for the Loschmidt echo
Eduardo Zambrano, Alfredo M. Ozorio de Almeida
We obtain an initial value representation for the quantum Loschmidt echo from the semiclassical theory of Wigner function evolution, together with classical first-order perturbatio…
quant-ph2009★ 5 cited
Blind spots between quantum states
Eduardo Zambrano, Alfredo M Ozorio de Almeida
The overlap of a large quantum state with its image, under tiny translations, oscillates swiftly. We here show that complete orthogonality occurs generically at isolated points. De…