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Quantum gases with SU(N)-symmetry and orbital degrees of freedom using alkaline-earth-like atoms

Simon Fölling, LMU

29.01.2016 at 09:00 

Ultracold atom experiments are achieving an ever increasing control over the dynamics and interactions between particles, allowing for very clean implementations of quantum many body systems with both external and internal degrees of freedom. Degenerate ensembles of more complex atoms with Alkaline-earth-like electronic structure, such as ytterbium, allow for novel many-body systems to be modeled and probed due to their extended SU(N)  symmetry and more complex internal structure. In our experiments, we exploit these properties by implementing SU(N) symmetric gases as well as coupling internal degrees of freedom of the atoms to the external degrees via state-dependent potentials. One motivation to use these states is to implement Kondo lattice-type physics with  two orbitals, using spin-exchanging interactions between atoms in different atomic states. In addition, the   enhanced symmetry of the interactions allows for implementation of SU(N) symmetric hamiltonians, for which we characterize the metal to insulator crossover.

A 450, Theresienstr. 37