Non-Markovianity: initial correlations and nonlinear optical measurements
arXiv:1111.3722 · doi:10.1098/rsta.2011.0203
Abstract
By extending the response function approach developed in nonlinear optics, we analytically derive an expression for the non-Markovianity [Laine, et al, Phys. Rev. A 81, 062115 (2010)] 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.
accepted for publication in Philisophical Transactions of the Royal Society A
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