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Observation of the Presuperfluid Regime in a Two-Dimensional Bose Gas by Tung, S.; Lamporesi, G.; Lobser, D.; Xia, L.; Cornell, E. A. is a scholarly article available to read on EtoBox.

What is Observation of the Presuperfluid Regime in a Two-Dimensional Bose Gas about?

In complementary images of coordinate-space and momentum-space density in a trapped 2D Bose gas, we observe the emergence of pre-superfluid behavior. As phase-space density $\rho$ increases toward degenerate values, we observe a gradual divergence of the compressibility $\kappa$ from the value predicted by a bare-atom model, $\kappa_{ba}$. $\kappa/\kappa_{ba}$ grows to 1.7 before $\rho$ 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-meanfield physics in the pre-superfluid but degenerate 2D Bose gas.

Author

Tung, S.; Lamporesi, G.; Lobser, D.; Xia, L.; Cornell, E. A.

Published

2010

Language

EN