Weakly Interacting Bose Gas in the One-Dimensional Limit
We prepare a chemically and thermally one-dimensional (1D) quantum degenerate Bose gas in a single microtrap. We introduce a new interferometric method to distinguish the quasicondensate fraction of the gas from the thermal cloud at finite temperature. We reach temperatures down to kT≈0.5ℏω⊥ (transv...
Main Authors: | , , , , |
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Other Authors: | , |
Format: | Article |
Language: | English |
Published: |
American Physical Society,
2011-07-08T22:07:07Z.
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Subjects: | |
Online Access: | Get fulltext |
Summary: | We prepare a chemically and thermally one-dimensional (1D) quantum degenerate Bose gas in a single microtrap. We introduce a new interferometric method to distinguish the quasicondensate fraction of the gas from the thermal cloud at finite temperature. We reach temperatures down to kT≈0.5ℏω⊥ (transverse oscillator eigenfrequency ω⊥) when collisional thermalization slows down as expected in 1D. At the lowest temperatures the transverse-momentum distribution exhibits a residual dependence on the line density n1D [n subscript 1D], characteristic for 1D systems. For very low densities the approach to the transverse single-particle ground state is linear in n1D [n subscript 1D]. European Union Austrian Science Fund Deutsche Forschungsgemeinschaft (DFG) Engineering and Physical Sciences Research Council |
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