In situ observation of sub-Poissonian atom-number fluctuations in a repulsive 1D Bose gas: quantum quasi-condensate and strongly interacting regimes - Archive ouverte HAL Accéder directement au contenu
Pré-Publication, Document De Travail Année : 2011

In situ observation of sub-Poissonian atom-number fluctuations in a repulsive 1D Bose gas: quantum quasi-condensate and strongly interacting regimes

Résumé

We report on local measurements of atom number fluctuations in slices of a single 1D Bose gas with repulsive interactions. For weakly interacting gases, the fluctuations are super-Poissonian at intermediate atomic densities and become sub-Poissonian at high densities once the gas enters into the quantum quasi-condensate regime. At stronger interactions, when approaching the fermionization regime, we no longer observe super-Poissonian statistics; the fluctuations go from Poissonian to sub-Poissonian as the density is increased, as those in a Fermi gas.
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Dates et versions

hal-00576883 , version 1 (15-03-2011)
hal-00576883 , version 2 (17-03-2011)
hal-00576883 , version 3 (21-03-2011)
hal-00576883 , version 4 (22-06-2011)

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Thibaut Jacqmin, Julien Armijo, Tarik Berrada, Karen Kheruntsyan, Isabelle Bouchoule. In situ observation of sub-Poissonian atom-number fluctuations in a repulsive 1D Bose gas: quantum quasi-condensate and strongly interacting regimes. 2011. ⟨hal-00576883v2⟩
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