Measuring the condensate fraction of rapidly rotating trapped boson systems: off-diagonal order from the density profile.
We demonstrate a direct connection between the density profile of a system of ultracold trapped bosonic particles in the rapid-rotation limit and its condensate fraction. This connection can be used to probe the crossover from condensed vortex-lattice states to uncondensed quantum-fluid states that occurs in rapidly rotating boson systems as the particle density decreases or the rotation frequency increases. We illustrate our proposal with a series of examples, including ones based on models of realistic finite trap systems, and comment on its application to freely expanding boson density profile measurements.
Sinova
Jairo
J
Department of Physics, University of Texas at Austin, Austin, Texas 78712-1081, USA.
Hanna
C B
CB
MacDonald
A H
AH