Long phase coherence time and number squeezing of two Bose-Einstein condensates on an atom chip

G. B. Jo; Y. Shin; S. Will; T. A. Pasquini; M. Saba; W. Ketterle; D. E. Pritchard; M. Vengalattore; M. Prentiss

doi:10.1103/PhysRevLett.98.030407

Long phase coherence time and number squeezing of two Bose-Einstein condensates on an atom chip

G. B. Jo
, Y. Shin
, S. Will
, T. A. Pasquini
, M. Saba
, W. Ketterle
, D. E. Pritchard
, M. Vengalattore
, M. Prentiss

Department of Physics
Massachusetts Institute of Technology
Physics Department
Harvard University

Research output: Contribution to journal › Article › peer-review

295 Citations (Scopus)

Abstract

We measure the relative phase of two Bose-Einstein condensates confined in a radio frequency induced double-well potential on an atom chip. We observe phase coherence between the separated condensates for times up to ∼200ms after splitting, a factor of 10 longer than the phase diffusion time expected for a coherent state for our experimental conditions. The enhanced coherence time is attributed to number squeezing of the initial state by a factor of 10. In addition, we demonstrate a rotationally sensitive (Sagnac) geometry for a guided atom interferometer by propagating the split condensates.

Original language	English
Article number	030407
Journal	Physical Review Letters
Volume	98
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevLett.98.030407
Publication status	Published - 30 Jan 2007
Externally published	Yes

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10.1103/PhysRevLett.98.030407

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abstract = "We measure the relative phase of two Bose-Einstein condensates confined in a radio frequency induced double-well potential on an atom chip. We observe phase coherence between the separated condensates for times up to ∼200ms after splitting, a factor of 10 longer than the phase diffusion time expected for a coherent state for our experimental conditions. The enhanced coherence time is attributed to number squeezing of the initial state by a factor of 10. In addition, we demonstrate a rotationally sensitive (Sagnac) geometry for a guided atom interferometer by propagating the split condensates.",

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AU - Jo, G. B.

AU - Shin, Y.

AU - Will, S.

AU - Pasquini, T. A.

AU - Saba, M.

AU - Ketterle, W.

AU - Pritchard, D. E.

AU - Vengalattore, M.

AU - Prentiss, M.

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Y1 - 2007/1/30

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AB - We measure the relative phase of two Bose-Einstein condensates confined in a radio frequency induced double-well potential on an atom chip. We observe phase coherence between the separated condensates for times up to ∼200ms after splitting, a factor of 10 longer than the phase diffusion time expected for a coherent state for our experimental conditions. The enhanced coherence time is attributed to number squeezing of the initial state by a factor of 10. In addition, we demonstrate a rotationally sensitive (Sagnac) geometry for a guided atom interferometer by propagating the split condensates.

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DO - 10.1103/PhysRevLett.98.030407

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Long phase coherence time and number squeezing of two Bose-Einstein condensates on an atom chip

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