Rotating cold atoms
The behaviour of rotating superfluids has been of fundamental interest since Kamerlingh Onnes liquified helium more than a century ago, and fuelled Landau’s two-fluid description. With the advent of Bose Einstein Condensates, these topics are revisited and the intimate link between superfluidity, superconductivity and condensation is further investigated. This hydrodynamic description is not adequate for very fast rotating clouds. The system then enters the Lowest Landau Level and forms exotic ground states related to the Quantum Hall Effect.