Quantum processing photonic states in optical lattices

Abstract

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.

4 pages, 4 figures

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• Long-distance quantum communication with atomic ensembles and linear optics
• Experimental demonstration of quantum memory for light
• Controlled Collisions for Multiparticle Entanglement of Optically Trapped Atoms
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Cited by in corpus (4)

• Quantum interface between light and atomic ensembles
• Collective generation of quantum states of light by entangled atoms
• Photonic Phase Gate via an Exchange of Fermionic Spin Waves in a Spin Chain
• Slow light propagation and amplification via electromagnetically induced transparency and four-wave mixing in an optically dense atomic vapor