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Berlin 2012 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 19: Correlated Electrons: (General) Theory 2

TT 19.10: Talk

Tuesday, March 27, 2012, 12:15–12:30, H 3010

Supersymmetry in Rydberg-dressed lattice fermions — •Hendrik Weimer1, Liza Huijse1, Alexey Gorshkov2, Guido Pupillo3, Peter Zoller4, Mikhail Lukin1, and Eugene Demler11Physics Department, Harvard University, Cambridge, MA, USA — 2IQI, Caltech, Pasadena, CA, USA — 3University of Strasbourg, Strasbourg, France — 4University of Innsbruck and IQOQI, Innsbruck, Austria

Supersymmetry is a powerful tool that allows the characterization of strongly correlated many-body systems, in particular in the case of supersymmetric extensions of the fermionic Hubbard model [1]. At the same time, these models can exhibit rich and exotic physics on their own, such as flat bands or exponentially large ground state degeneracy. We show that such lattice models can be realized with Rydberg-dressed fermions in optical lattices. Strong interactions within the ground state manifold of the atoms can be realized by admixing a weak contribution of a highly excited Rydberg state [2]. By tuning the experimental parameters away from the supersymmetric point, it is possible to assess the validity of a supersymmetric approach to strongly correlated electrons in a systematic way.
P. Fendley, K. Schoutens, J. de Boer, PRL 90, 120402 (2003).
J. Honer, H. Weimer, T. Pfau, H. P. Büchler, PRL 105, 160404 (2010).

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