Phys. Rev. Lett. 100, 063601 (2008) [4 pages]Quantum Processing Photonic States in Optical LatticesReceived 9 November 2006; published 13 February 2008 The mapping of photonic states to collective excitations of atomic ensembles is a powerful tool which finds a useful application in the realization of quantum memories and quantum repeaters. In this work we show that cold atoms in optical lattices can be used to perform an entangling unitary operation on the transferred atomic excitations. After the release of the quantum atomic state, our protocol results in a deterministic two qubit gate for photons. The proposed scheme is feasible with current experimental techniques and robust against the dominant sources of noise. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.063601
DOI:
10.1103/PhysRevLett.100.063601
PACS:
03.67.Lx, 03.67.Ac, 03.67.Bg, 37.10.Jk
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