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Quantum dynamics of atomic bright solitons under splitting and recollision, and implications for interferometry

Quantum dynamics of atomic bright solitons under splitting and recollision, and implications for interferometry
Quantum dynamics of atomic bright solitons under splitting and recollision, and implications for interferometry
We numerically study the classical and quantum dynamics of an atomic bright soliton in a highly elongated one dimensional harmonic trap with a Gaussian barrier. In the regime of the recent experiment by Dyke et al the system realizes a coherent nonlinear soliton beam-splitter and interferometer whose accuracy we analyze. In the case of tighter radial trap confinement and enhanced quantum fluctuations, a split soliton can represent a spin-squeezed, or alternatively, a fragmented condensate with reduced phase coherence that can be measured by interfering the split soliton by the barrier. We also find large quantum mechanical uncertainties in the soliton’s position and momentum due to nonlinear interaction with the barrier.
043040-[29pp]
Martin, A.D.
642fdaf4-ea13-4e82-9ef1-a4bd5a507364
Ruostekoski, J.
2beb155e-64b0-4ee9-9cfe-079947a9c9f4
Martin, A.D.
642fdaf4-ea13-4e82-9ef1-a4bd5a507364
Ruostekoski, J.
2beb155e-64b0-4ee9-9cfe-079947a9c9f4

Martin, A.D. and Ruostekoski, J. (2012) Quantum dynamics of atomic bright solitons under splitting and recollision, and implications for interferometry. New Journal of Physics, 14, 043040-[29pp]. (doi:10.1088/1367-2630/14/4/043040).

Record type: Article

Abstract

We numerically study the classical and quantum dynamics of an atomic bright soliton in a highly elongated one dimensional harmonic trap with a Gaussian barrier. In the regime of the recent experiment by Dyke et al the system realizes a coherent nonlinear soliton beam-splitter and interferometer whose accuracy we analyze. In the case of tighter radial trap confinement and enhanced quantum fluctuations, a split soliton can represent a spin-squeezed, or alternatively, a fragmented condensate with reduced phase coherence that can be measured by interfering the split soliton by the barrier. We also find large quantum mechanical uncertainties in the soliton’s position and momentum due to nonlinear interaction with the barrier.

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Published date: 27 April 2012
Organisations: Applied Mathematics

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Local EPrints ID: 337629
URI: http://eprints.soton.ac.uk/id/eprint/337629
PURE UUID: 990dbb14-99be-44a8-a69e-7f66b08d51c0

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Date deposited: 01 May 2012 13:11
Last modified: 08 Nov 2021 22:42

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Contributors

Author: A.D. Martin
Author: J. Ruostekoski

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