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Particle number fractionilization of an atomic Fermi-Dirac gas in an optical lattice

Particle number fractionilization of an atomic Fermi-Dirac gas in an optical lattice
Particle number fractionilization of an atomic Fermi-Dirac gas in an optical lattice
We show that a dilute 2-species gas of Fermi-Dirac alkali-metal atoms in a periodic optical lattice may exhibit fractionization of particle number when the two components are coupled via a coherent electromagnetic field with a topologically nontrivial phase profile. This results in fractional eigenvalues of the spin operator with vanishing fluctuations. The fractional part can be accurately controlled by modifying the effective detuning of the electromagnetic field.
0031-9007
180401-[4pp]
Ruostekoski, Janne
2beb155e-64b0-4ee9-9cfe-079947a9c9f4
Dunne, Gerald V.
ee62a16a-b88e-40b7-b7c3-5c2dc474f89c
Javanainen, Juha
ae127878-c1cf-4e23-bebb-c3ec76b61081
Ruostekoski, Janne
2beb155e-64b0-4ee9-9cfe-079947a9c9f4
Dunne, Gerald V.
ee62a16a-b88e-40b7-b7c3-5c2dc474f89c
Javanainen, Juha
ae127878-c1cf-4e23-bebb-c3ec76b61081

Ruostekoski, Janne, Dunne, Gerald V. and Javanainen, Juha (2002) Particle number fractionilization of an atomic Fermi-Dirac gas in an optical lattice. Physical Review Letters, 88 (18), 180401-[4pp]. (doi:10.1103/PhysRevLett.88.180401). (PMID:12005669)

Record type: Article

Abstract

We show that a dilute 2-species gas of Fermi-Dirac alkali-metal atoms in a periodic optical lattice may exhibit fractionization of particle number when the two components are coupled via a coherent electromagnetic field with a topologically nontrivial phase profile. This results in fractional eigenvalues of the spin operator with vanishing fluctuations. The fractional part can be accurately controlled by modifying the effective detuning of the electromagnetic field.

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Published date: 2002

Identifiers

Local EPrints ID: 29350
URI: http://eprints.soton.ac.uk/id/eprint/29350
DOI: doi:10.1103/PhysRevLett.88.180401
ISSN: 0031-9007
PURE UUID: 60034b0f-992b-4a64-8a78-48b65ffedf5e

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Date deposited: 31 May 2006
Last modified: 15 Mar 2024 07:30

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Contributors

Author: Janne Ruostekoski
Author: Gerald V. Dunne
Author: Juha Javanainen

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