Impedance-matched cavity quantum memory

Mikael Afzelius; Christoph Simon

doi:10.1103/PhysRevA.82.022310

Impedance-matched cavity quantum memory

Quantum Physics 2015-05-18 v1

Authors: Mikael Afzelius , Christoph Simon

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Abstract

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 towards quantum memories with close to unit efficiency.

Keywords

quantum memory cavity quantum electrodynamics optical microcavities and photonic crystals

Cite

@article{arxiv.1004.2469,
  title  = {Impedance-matched cavity quantum memory},
  author = {Mikael Afzelius and Christoph Simon},
  journal= {arXiv preprint arXiv:1004.2469},
  year   = {2015}
}

Comments

4 pages, 2 figures

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