Spin-wave storage using chirped control fields in atomic frequency comb-based quantum memory

Journal Article · Fri Oct 15 04:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.042309· OSTI ID:21450727

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

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

It has been shown that an inhomogeneously broadened optical transition shaped into an atomic frequency comb can store a large number of temporal modes of the electromagnetic field at the single-photon level without the need to increase the optical depth of the storage material. The readout of light modes is made efficient thanks to the rephasing of the optical-wavelength coherence similar to photon-echo-type techniques, and the reemission time is given by the comb structure. For on-demand readout and long storage times, two control fields are used to transfer the optical coherence back and forth into a spin wave. Here, we present a detailed analysis of the spin-wave storage based on chirped adiabatic control fields. In particular, we verify that chirped fields require significantly weaker intensities than {pi} pulses. The price to pay is a reduction of the multimode storage capacity that we quantify for realistic material parameters associated with solids doped with rare-earth-metal ions.

• OSTI ID: 21450727
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 82; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
BOSONS
CHARGED PARTICLES
CONTROL
DEPTH
DIMENSIONS
DOPED MATERIALS
ELECTROMAGNETIC FIELDS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
INFORMATION
IONS
LINE BROADENING
MASSLESS PARTICLES
MATERIALS
PHOTONS
PULSES
QUANTUM INFORMATION
QUBITS
RADIATIONS
READOUT SYSTEMS
SOLIDS
SPIN WAVES
STORAGE
VISIBLE RADIATION