Multimodal properties and dynamics of gradient echo quantum memory.
We investigate the properties of a recently proposed gradient echo memory (GEM) scheme for information mapping between optical and atomic systems. We show that GEM can be described by the dynamic formation of polaritons in k space. This picture highlights the flexibility and robustness with regards to the external control of the storage process. Our results also show that, as GEM is a frequency-encoding memory, it can accurately preserve the shape of signals that have large time-bandwidth products, even at moderate optical depths. At higher optical depths, we show that GEM is a high fidelity multimode quantum memory.
Hétet
G
G
ARC COE for Quantum-Atom Optics, Australian National University, Canberra, ACT 0200, Australia.
Longdell
J J
JJ
Sellars
M J
MJ
Lam
P K
PK
Buchler
B C
BC