Non-Markovian decoherence: Complete positivity and decomposition

H. McAneney, J. Lee, D. Ahn, M. S. Kim

Research output: Contribution to journalArticlepeer-review

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In this work, the non-Markovian decoherence is considered in two ways. Firstly, an effective Hamiltonian approach is demonstrated to investigate the decoherence of a quantum system in a non-Markovian environment, in which complete positivity of the reduced dynamics is achieved. This method uses the notion of an effective environment, that is a subsystem of the environment that causes the decoherence. Secondly, the evolution of the system and environment is decomposed, thus partially illuminating how they would interact given that memory effects are allowed. It should be noted that beam splitters and rotators are sufficient to explain this decomposition.

Original languageEnglish
Pages (from-to)935-943
Number of pages9
JournalJournal of Modern Optics
Issue number7
StatePublished - 10 May 2005


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