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Início

Agenda


08 de agosto de 2018
16h30
Sala 18 (Cristalografia)

Nadja Kolb Bernardes
DF-UFPE

A correlation measure detecting almost all non-Markovian evolutions

We investigate the ability of correlation measures to witness non-Markovian open quantum
system dynamics. It is shown that the mutual information and any entanglement measure between the
system and an ancilla do not witness all non-Markovian dynamics. A new correlation measure is
introduced, and it is proven that, in an enlarged setting with two ancillary systems, this measure
detects almost all non-Markovian dynamics, except possibly a zero-measure set of dynamics that is
non-bijective in finite time-intervals. Our proof is constructive and provides different initial states
detecting the non-Markovian evolutions. These states are all separable and some are arbitrarily close
to a product state.