Simulation of indivisible qubit channels in collision models

Details Simulation of indivisible qubit channels in collision models Simulation of indivisible qubit channels in collision models

2012-02-28

arxiv.org/abs/1202.6315v1

Physics

Quantum Physics

6 pages, 2 figures, submitted to JPB

Scientific paper

A sequence of controlled collisions between a quantum system and its environment (composed of a set of quantum objects) naturally simulates (with arbitrary precision) any Markovian quantum dynamics of the system under consideration. In this paper we propose and study the problem of simulation of an {\it arbitrary} quantum channel via collision models. We show that a correlated environment is capable to simulate {\it non-Markovian} evolutions leading to any indivisible qubit channel. In particular, we derive the corresponding master equation generating a continuous time non-Markovian dynamics implementing the universal NOT gate being an example of the most non-Markovian quantum channels.

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