期刊
PHYSICAL REVIEW LETTERS
卷 110, 期 20, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.110.200406
关键词
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资金
- EPSRC [EP/G026823/1]
- Royal Society
- AFOSR
- ARO
- DARPA OLE
- Engineering and Physical Sciences Research Council [EP/G026823/1, 1104880] Funding Source: researchfish
- EPSRC [EP/G026823/1] Funding Source: UKRI
We have observed the Bose-Einstein condensation of an atomic gas in the (quasi)uniform three-dimensional potential of an optical box trap. Condensation is seen in the bimodal momentum distribution and the anisotropic time-of-flight expansion of the condensate. The critical temperature agrees with the theoretical prediction for a uniform Bose gas. The momentum distribution of a noncondensed quantum-degenerate gas is also clearly distinct from the conventional case of a harmonically trapped sample and close to the expected distribution in a uniform system. We confirm the coherence of our condensate in a matter-wave interference experiment. Our experiments open many new possibilities for fundamental studies of many-body physics.
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