Controlled-dipole quantum memory

Details Controlled-dipole quantum memory Controlled-dipole quantum memory

2011-06-17

arxiv.org/abs/1106.3513v1

Physics

Quantum Physics

4 pages, 2 figures

Scientific paper

We present a quantum memory protocol for photons that is based on the direct control of the transition dipole moment. We focus on the case where the light-matter interaction is enhanced by a cavity. We show that the optimal write process (maximizing the storage efficiency) is related to the optimal read process by a reversal of the {\it effective time} $\tau=\int dt g^2(t)/\kappa$, where $g(t)$ is the time-dependent coupling and $\kappa$ is the cavity decay rate. We discuss the implementation of the protocol in certain rare-earth ion doped crystals, where transitions can be turned on and off by switching a magnetic field.

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