Electro-optic quantum memory for light using two-level atoms.
We present a simple quantum memory scheme that allows for the storage of a light field in an ensemble of two-level atoms. The technique is analogous to the NMR gradient echo for which the imprinting and recalling of the input field are performed by controlling a linearly varying broadening. Our protocol is perfectly efficient in the limit of high optical depths and the output pulse is emitted in the forward direction. We provide a numerical analysis of the protocol together with an experiment performed in a solid state system. In close agreement with our model, the experiment shows a total efficiency of up to 15%, and a recall efficiency of 26%. We suggest simple realizable improvements for the experiment to surpass the no-cloning limit.
Hétet
G
G
ARC COE for Quantum-Atom Optics, Australian National University, Canberra, ACT 0200, Australia.
Longdell
J J
JJ
Alexander
A L
AL
Lam
P K
PK
Sellars
M J
MJ