Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 34: Poster 1

Q 34.54: Poster

Dienstag, 13. März 2012, 16:30–19:00, Poster.I+II

Using ytterbium to study many body physics in ultra-cold quantum gases — •Christian Hofrichter, Francesco Scazza, Pieter de Groot, Philip Ketterer, Immanuel Bloch, and Simon Fölling — MPI für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching and Ludwig-Maximilians-Universität, Schellingstraße 4, 80799 München, Germany

Ultracold atoms in optical lattices have already been demonstrated to be excellent prototype systems for condensed matter physics simulation and quantum information processing. Well-known Hamiltonians that play an important role in condensed matter systems like the Bose-Hubbard or Fermi-Hubbard-Hamiltonian can be studied on the microscopic level.

Alkaline-earth-type atoms with their bosonic and fermionic isotopes have some attractive properties that make them suitable for accessing new regimes of many body physics. They possess a long-lived excited state which can be used for example to implement a state-dependent lattice, enabling the realization of more complex classes of Hamiltonians. In addition the high nuclear spin of some of the fermionic isotopes, which at the same time is highly decoupled from the electronic states, gives rise to an enlarged SU(N) symmetry of the Hamiltonian. Theory predicts new ground state phases of magnetic ordering at sufficiently low temperatures for such systems with high SU(N) symmetry.

We will present our new setup designed for cooling ytterbium to degeneracy for quantum simulation experiments in state-dependent optical lattice potentials.

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