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- W2020831723 abstract "In complementary images of coordinate-space and momentum-space density in a trapped 2D Bose gas, we observe the emergence of presuperfluid behavior. As phase-space density $ensuremath{rho}$ increases toward degenerate values, we observe a gradual divergence of the compressibility $ensuremath{kappa}$ from the value predicted by a bare-atom model, ${ensuremath{kappa}}_{mathrm{ba}}$. $ensuremath{kappa}/{ensuremath{kappa}}_{mathrm{ba}}$ grows to 1.7 before $ensuremath{rho}$ reaches the value for which we observe the sudden emergence of a spike at $p=0$ in momentum space. Momentum-space images are acquired by means of a 2D focusing technique. Our data represent the first observation of non-mean-field physics in the presuperfluid but degenerate 2D Bose gas." @default.
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- W2020831723 date "2010-12-03" @default.
- W2020831723 modified "2023-09-23" @default.
- W2020831723 title "Observation of the Presuperfluid Regime in a Two-Dimensional Bose Gas" @default.
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- W2020831723 doi "https://doi.org/10.1103/physrevlett.105.230408" @default.
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