Dark Entangled States by Coherent Absorption in Cascaded Quantum Networks

Details Dark Entangled States by Coherent Absorption in Cascaded Quantum Networks Dark Entangled States by Coherent Absorption in Cascaded Quantum Networks

2011-12-07

arxiv.org/abs/1112.1690v1

Physics

Quantum Physics

7 pages, 4 figures

Scientific paper

We study the dissipative dynamics and the formation of entangled states in driven cascaded quantum networks, where multiple systems are coupled to a common unidirectional bath. Specifically, we identify the conditions under which emission and coherent reabsorption of radiation drives the whole network into a pure stationary state with non-trivial quantum correlations between the individual nodes. For the case of cascaded two-level systems, we present an explicit preparation scheme that allows for tuning the network into different classes of multi-partite entangled states. We discuss potential realizations of such cascaded networks with optical and microwave photons, where these effects could be used, for example, for new long-distance entanglement distribution protocols.

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