Collision model for non-Markovian quantum dynamics



: Kretschmer, Silvan; Luoma, Kimmo; Strunz, Walter T.

Publisher: AMER PHYSICAL SOC

: 2016

 Physical Review A

: PHYSICAL REVIEW A

: PHYS REV A

: ARTN 012106

: 94

: 9

: 2469-9926

DOI: https://doi.org/10.1103/PhysRevA.94.012106

: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.94.012106


We study the applicability of collisional models for non-Markovian dynamics of open quantum systems. By allowing interactions between the separate environmental degrees of freedom in between collisions we are able to construct a collision model that allows us to study quantum memory effects in open system dynamics. We also discuss the possibility to embed non-Markovian collision model dynamics into Markovian collision model dynamics in an extended state space. As a concrete example we show how, using the proposed class of collision models, we can discretely model non-Markovian amplitude damping of a qubit. In the time-continuous limit, we obtain the well-known results for spontaneous decay of a two-level system into a structured zero-temperature reservoir.



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