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Q: Fachverband Quantenoptik und Photonik
Q 4: Quanteneffekte: QED
Q 4.1: Vortrag
Montag, 12. März 2012, 10:30–10:45, V7.01
Quantum reservoir engineering of photon states — •Christian Arenz1, Cecilia Cormick1, David Vitali2, and Giovanna Morigi1 — 1Universität des Saarlandes — 2Universit‘a di Camerino
The coupling of a quantum system to its surrounding environment leads to dissipation and decoherence. Its was shown, however, that under appropriate engineering of the coupling between system and environment, the environment can also be used as a resource for preparing the system in a target non-classical state, which is the steady state of the coupled dynamics [1,2,3,4].
In this talk we present a protocol for creating an entangled state of two modes of a high-finesse microwave cavity by using a beam of atoms. We engineer the coupling between the atoms and the two modes by means of classical fields and obtain a Lindblad-type of master equation for the cavity modes. We show that the dynamics this equation describes can drive the system into a unique asymptotic states, that is the desired entangled state. The feasibility of the protocol is discussed considering the effect of cavity and atomic decay.
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[2] J.F. Poyatos, J.I Cirac and P. Zoller, Phys. Rev. Lett. 77, 4728 (1996).
[3] S. Pielawa, G. Morigi, D. Vitali and L. Davidovich, Rev. Lett 98, 240401 (2010).
[4] S. Diehl, A. Micheli, A. Kantian, B. Kraus, H.P. Büchler and P. Zoller, Nature Phys. 4, 878 (2008).