Cavity enhanced storage - preparing for high efficiency quantum memories

Abstract

Cavity assisted quantum memory storage has been proposed [PRA 82, 022310 (2010), PRA 82, 022311 (2010)] for creating efficient (close to unity) quantum memories using weakly absorbing materials. Using this approach we experimentally demonstrate a significant (about 20-fold) enhancement in quantum memory efficiency compared to the no cavity case. A strong dispersion originating from absorption engineering inside the cavity was observed, which directly affect the cavity line-width. A more than 3 orders of magnitude reduction of cavity mode spacing and cavity line-width from GHz to MHz was observed. We are not aware of any previous observation of several orders of magnitudes cavity mode spacing and cavity line-width reduction due to slow light effects.

13 pages, 5 figures

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• Off-resonant Raman echo quantum memory on atoms with natural inhomogeneous broadening in optical QED cavity
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• Efficient cavity-assisted storage of photonic qubits in a solid-state quantum memory
• Broadband Multiresonator Quantum Memory
• Persistent atomic frequency comb based on Zeeman sub-levels of an erbium-doped crystal waveguide
• Strong excitation of emitters in an impedance matched cavity: the area theorem, π-pulse and self-induced transparency
• Quantum Teleportation from Telecom Photons to Erbium-ion Ensembles
• Efficient spectral hole-burning and atomic frequency comb storage in Nd3+:YLiF4
• A compact entanglement distillery using realistic quantum memories
• Entropy transfer from a quantum particle to a classical coherent light field