Physics – Quantum Physics
Scientific paper
2008-12-02
Phys. Rev. A 79, 043808 (2009).
Physics
Quantum Physics
10 pages, 7 figures, RevTeX4
Scientific paper
We propose an experimentally accessible procedure for conditional preparation of highly non-classical states of collective spin of an atomic ensemble. The quantum state engineering is based on a combination of QND interaction between atoms and light previously prepared in a non-Gaussian state using photon subtraction from squeezed vacuum beam, homodyne detection on the output light beam, and a coherent displacement of atomic state. The procedure is capable of non-deterministic preparation of a wide class of superpositions of atomic Dicke states. We present several techniques to optimize the performance of the protocol and maximize the trade-off between fidelity of prepared state and success probability of the scheme.
Fiurasek Jaromir
Lemr Karel
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