Non-Markovianity: initial correlations and nonlinear optical measurements

نویسندگان

  • Arend G. Dijkstra
  • Yoshitaka Tanimura
چکیده

By extending the response function approach developed in nonlinear optics, we analytically derive an expression for the non-Markovianity in the time evolution of a system in contact with a quantum mechanical bath, and find a close connection with the directly observable nonlinear optical response. The result indicates that memory in the bath-induced fluctuations rather than in the dissipation causes non-Markovianity. Initial correlations between states of the system and the bath are shown to be essential for a correct understanding of the non-Markovianity. These correlations are included in our treatment through a preparation function.

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عنوان ژورنال:

دوره 370  شماره 

صفحات  -

تاریخ انتشار 2012