title: Multimodal properties and dynamics of gradient echo quantum memory.
abstract: 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.
authors.affiliation: ARC COE for Quantum-Atom Optics, Australian National University, Canberra, ACT 0200, Australia.
authors.forename: G
authors.initials: G
authors.lastname: Hétet
authors.forename: J J
authors.initials: JJ
authors.lastname: Longdell
authors.forename: M J
authors.initials: MJ
authors.lastname: Sellars
authors.forename: P K
authors.initials: PK
authors.lastname: Lam
authors.forename: B C
authors.initials: BC
authors.lastname: Buchler