Superfluidity versus Bloch oscillations in confined atomic gases.
- Büchler HP Theoretische Physik, ETH-Hönggerberg, CH-8093 Zürich, Switzerland.
- Geshkenbein VB
- Blatter G
- 2001-09-05
Published in:
- Physical review letters. - 2001
English
We study the superfluid properties of (quasi) one-dimensional bosonic atom gases/liquids in traps with finite geometries in the presence of strong quantum fluctuations. Driving the condensate with a moving defect we find the nucleation rate for phase slips using instanton techniques. While phase slips are quenched in a ring resulting in a superfluid response, they proliferate in a tube geometry where we find Bloch oscillations in the chemical potential. These Bloch oscillations describe the individual tunneling of atoms through the defect and thus are a consequence of particle quantization.
- Language
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- English
- Open access status
- green
- Identifiers
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- DOI 10.1103/PhysRevLett.87.100403
- PMID 11531468
- Persistent URL
- https://sonar.ch/global/documents/71494
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