期刊
PHYSICAL REVIEW LETTERS
卷 106, 期 25, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.106.250403
关键词
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资金
- EPSRC [EP/I010580/1]
- Newton Trust
- EPSRC [EP/I010580/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/I010580/1] Funding Source: researchfish
We perform high-precision measurements of the condensation temperature of a harmonically trapped atomic Bose gas with widely tunable interactions. For weak interactions we observe a negative shift of the critical temperature in excellent agreement with mean-field theory. However for sufficiently strong interactions we clearly observe an additional positive shift, characteristic of beyond-mean-field critical correlations. We also discuss nonequilibrium effects on the apparent critical temperature for both very weak and very strong interactions.
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