期刊
PHYSICAL REVIEW LETTERS
卷 106, 期 23, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.106.230405
关键词
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资金
- IFRAF Institute
- ANR [ANR-08-BLAN-0165-03]
- ARC [DP110101047]
- CoQuS Graduate School of the FWF
- Austro-French FWF-ANR [I607]
- Austrian Science Fund (FWF) [I 607] Funding Source: researchfish
- Austrian Science Fund (FWF) [W1210, I607] Funding Source: Austrian Science Fund (FWF)
- Agence Nationale de la Recherche (ANR) [ANR-08-BLAN-0165] Funding Source: Agence Nationale de la Recherche (ANR)
We report on local, in situ measurements of atom number fluctuations in slices of a one-dimensional Bose gas on an atom chip setup. By using current modulation techniques to prevent cloud fragmentation, we are able to probe the crossover from weak to strong interactions. For weak interactions, fluctuations go continuously from super- to sub-Poissonian as the density is increased, which is a signature of the transition between the subregimes where the two-body correlation function is dominated, respectively, by thermal and quantum contributions. At stronger interactions, the super-Poissonian region disappears, and the fluctuations go directly from Poissonian to sub-Poissonian, as expected for a fermionized'' gas.
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