Motional dephasing of atomic clock spin waves in an optical lattice
Motional dephasing of atomic clock spin waves in an optical lattice
In a cold atomic ensemble the weak Raman scattering of an incident laser beam writes a spin-wave grating by transferring an atom between ground-level hyperfine states. For clock states, where magnetic dephasing is suppressed, thermal motion of the atoms across the spin wave is the principal source of dephasing on the sub-millisecond timescale, limiting the quantum memory time achievable. An investigation of the role of the optical lattice in reducing motional dephasing is presented, using Monte Carlo simulations to study the influence of ensemble temperature, trap depth and differential ac Stark shifts in the case of rubidium
124005
Jenkins, S.D.
65d861fb-b85a-4927-805a-7c906fca26c6
Zhang, T.
8c04fa0e-8230-4271-a134-64c3d4029231
Kennedy, T. A. B.
213e8d0b-c02a-4dd8-8ce1-feeac53961c7
8 June 2012
Jenkins, S.D.
65d861fb-b85a-4927-805a-7c906fca26c6
Zhang, T.
8c04fa0e-8230-4271-a134-64c3d4029231
Kennedy, T. A. B.
213e8d0b-c02a-4dd8-8ce1-feeac53961c7
Jenkins, S.D., Zhang, T. and Kennedy, T. A. B.
(2012)
Motional dephasing of atomic clock spin waves in an optical lattice.
[in special issue: Quantum Memories]
Journal of Physics B: Atomic and Molecular Physics, 45, .
(doi:10.1088/0953-4075/45/12/124005).
Abstract
In a cold atomic ensemble the weak Raman scattering of an incident laser beam writes a spin-wave grating by transferring an atom between ground-level hyperfine states. For clock states, where magnetic dephasing is suppressed, thermal motion of the atoms across the spin wave is the principal source of dephasing on the sub-millisecond timescale, limiting the quantum memory time achievable. An investigation of the role of the optical lattice in reducing motional dephasing is presented, using Monte Carlo simulations to study the influence of ensemble temperature, trap depth and differential ac Stark shifts in the case of rubidium
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Accepted/In Press date: 3 February 2012
Published date: 8 June 2012
Organisations:
Applied Mathematics
Identifiers
Local EPrints ID: 338793
URI: http://eprints.soton.ac.uk/id/eprint/338793
ISSN: 0953-4075
PURE UUID: 87093c08-66bd-4e33-aed6-0a1be158b542
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Date deposited: 17 May 2012 14:13
Last modified: 14 Mar 2024 11:05
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Author:
S.D. Jenkins
Author:
T. Zhang
Author:
T. A. B. Kennedy
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