Spin dynamics in a two dimensional quantum gas

We have investigated spin dynamics in a 2D quantum gas. Through spin-changing collisions, two clouds with opposite spin orientations are spontaneously created in a Bose-Einstein condensate. After ballistic expansion, both clouds acquire ring-shaped density distributions with superimposed angular den...

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Bibliographic Details
Published in:arXiv.org 2014-05
Main Authors: Pedersen, Poul L, Gajdacz, Miroslav, Deuretzbacher, Frank, Santos, Luis, Klempt, Carsten, Sherson, Jacob F, Hilliard, Andrew J, Arlt, Jan J
Format: Article
Language:English
Subjects:
Clouds
Density
Magnetism
Momentum
Quantum entanglement
Spin dynamics
Online Access:Get full text
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Summary:We have investigated spin dynamics in a 2D quantum gas. Through spin-changing collisions, two clouds with opposite spin orientations are spontaneously created in a Bose-Einstein condensate. After ballistic expansion, both clouds acquire ring-shaped density distributions with superimposed angular density modulations. The density distributions depend on the applied magnetic field and are well explained by a simple Bogoliubov model. We show that the two clouds are anti-correlated in momentum space. The observed momentum correlations pave the way towards the creation of an atom source with non-local Einstein-Podolsky-Rosen entanglement.
ISSN:2331-8422
DOI:10.48550/arxiv.1404.7385