Physics – Condensed Matter – Quantum Gases
Scientific paper
2010-11-21
Phys. Rev. A 83, 055601 (2011)
Physics
Condensed Matter
Quantum Gases
Scientific paper
10.1103/PhysRevA.83.055601
Recent experiments have demonstrated how quantum-mechanical impurities can be created within strongly correlated quantum gases and used to probe the coherence properties of these systems [S. Palzer, C. Zipkes, C. Sias, and M. K\"ohl, Phys. Rev. Lett. 103, 150601 (2009).]. Here we present a phenomenological model to simulate such an output coupler for a Tonks-Girardeau gas that shows qualitative agreement with the experimental results for atom transport and output coupling. Our model allows us to explore nonequilibrium transport phenomena in ultracold quantum gases and leads us to predict a regime of atom blockade, where the impurity component becomes localized in the parent cloud despite the presence of gravity. We show that this provides a stable mixed-species quantum gas in the strongly correlated limit.
Busch Th.
Goold John
McCann J. F.
Rutherford Lord
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