Approaches for a quantum memory at telecommunication wavelengths

Journal Article · Sat Jan 15 04:00:00 EST 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.012318· OSTI ID:21529051

Lauritzen, Bjoern; Minar, Jiri; Riedmatten, Hugues de; Afzelius, Mikael; Gisin, Nicolas ^[1]

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1. Group of Applied Physics, University of Geneva, CH-1211 Geneva 4 (Switzerland)

We report experimental storage and retrieval of weak coherent states of light at telecommunication wavelengths using erbium ions doped into a solid. We use two photon-echo-based quantum storage protocols. The first one is based on controlled reversible inhomogeneous broadening (CRIB). It allows the retrieval of the light on demand by controlling the collective atomic coherence with an external electric field, via the linear Stark effect. We study how atoms in the excited state affect the signal-to-noise ratio of the CRIB memory. Additionally we show how CRIB can be used to modify the temporal width of the retrieved light pulse. The second protocol is based on atomic frequency combs. Using this protocol we verify that the reversible mapping is phase preserving by performing an interference experiment with a local oscillator. These measurements are enabling steps toward solid-state quantum memories at telecommunication wavelengths. We also give an outlook on possible improvements.

• OSTI ID: 21529051
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 83; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANNIHILATION OPERATORS
ATOMS
BOSONS
CHARGED PARTICLES
COMPUTERS
DIMENSIONLESS NUMBERS
DOPED MATERIALS
EIGENSTATES
ELECTRIC FIELDS
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
ELEMENTARY PARTICLES
EQUIPMENT
ERBIUM IONS
INTERFERENCE
IONS
MASSLESS PARTICLES
MATERIALS
MATHEMATICAL OPERATORS
OSCILLATORS
PHOTONS
QUANTUM COMPUTERS
QUANTUM OPERATORS
RADIATIONS
SIGNAL-TO-NOISE RATIO
SOLIDS
STARK EFFECT
VISIBLE RADIATION
WAVELENGTHS