Impedance-matched cavity quantum memory

By M. Afzelius, C. Simon. 2010

154 citations recorded by the source corpus.

We consider an atomic frequency comb based quantum memory inside an asymmetric optical cavity. In this configuration it is possible to absorb the input light completely in a system with an effective optical depth of one, provided that the absorption per cavity round trip exactly matches the transmission of the coupling mirror (``impedance matching''). We show that the impedance matching results in a readout efficiency only limited by irreversible atomic dephasing, whose effect can be made very small in systems with large inhomogeneous broadening. Our proposal opens up an attractive route toward quantum memories with close to unit efficiency.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/cf27918b350c2cad90c8e193bb6f836fbe5c4a01

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In Artificial Intelligence

In Atomic and Molecular Physics, and Optics

Citations in the corpus

Quantum storage of entangled telecom-wavelength photons in an erbium-doped optical fibre (2014, background): “Furthermore, under certain circumstances, the retrieval process can approach unit efficiency[4, 16].”
Quantum storage of photonic entanglement in a crystal (2010, background): “Alternatively, optical cavities can be used to increase the effective interaction length [34, 35] without material specific side effects.”
Quantum memories: emerging applications and recent advances (2015, background): “s. This has been shown for quantum memories based on -level systems [71]. In particular, cavity enhancement for rare-earth-ion doped crystals has been shown theoretically for the AFC storage protocol [72,73]. This led to experimental demonstration of an ecient quantum memory in optically thin atomic”