Hamburg 2009 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 19: Ultracold atoms III: Manipulation and detection / Rydbergatoms (with Q)
A 19.1: Vortrag
Mittwoch, 4. März 2009, 16:30–16:45, Audi-B
Effects of Non-Abelian Gauge Potentials — •Andreas Jacob1, Luis Santos1, Michael Merkl2, Frank Zimmer2, and Patrik Öhberg2 — 1Institut für Theoretische Physik, Leibniz Universität Hannover — 2SUPA, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, United Kingdom
Artificial electromagnetism may be created for neutral atoms, e.g. by rotating the gas. Other forms of inducing artificial electromagnetism are possible, including ways of generating non-Abelian vector potentials. In this talk, we will first discuss simple laser setups that allow the creation of non-Abelian gauge potentials for atoms with a tripod level scheme. We will comment on specific experimental implementations in e.g. 4He* and 87Rb. In particular we will discuss a simple laser arrangement that generates a non-Abelian vector potential proportional to the Pauli matrices. This gauge potential induces a quasi-relativistic physics for cold gases similar to that in graphene, including the possibility of observation of metamaterial phenomena as Veselago lensing. We shall discuss in particular the effects of this gauge potential in the linear and nonlinear atom optics of condensates, including the possibility of creating regions of negative mass in the dispersion relation which allow for bright solitons in the presence of repulsive interactions.