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Q: Fachverband Quantenoptik und Photonik

Q 57: Poster 3: Quantengase, Ultrakalte Atome, Ultrakalte Moleküle, Materiewellen Optik, Präzisionsmessungen, Metrologie

Q 57.27: Poster

Thursday, March 17, 2011, 16:30–19:30, P1

Quantum dynamics of few ultra-cold atoms in a periodically shaken optical superlattice — Martin Esmann, Kirsten Stiebler, Bettina Gertjerenken, Niklas Teichmann, and •Christoph Weiss — Institut für Physik, Universität Oldenburg, 26111 Oldenburg

Photon-assisted tunneling is investigated both numerically and analytically in periodically shaken superlattices. While fractional photon-assisted tunneling was previously shown to be a small effect [1-3], for few particles (cf. [4]) in each of the double wells of an optical superlattice it can actually be a leading order effect. Experimentally, this should be observable with the existing experimental setup of Ref. [4]. Two-particle Schrödinger cat-states in three-well lattices are also investigated.

[1] N. Teichmann, M. Esmann, and C. Weiss, Phys. Rev. A, 79:063620, 2009.

[2] E. Haller, R. Hart, M. J. Mark, J. G. Danzl, L. Reichsöllner, and H.-C. Nägerl, Phys. Rev. Lett., 104:200403, 2010.

[3] G. Lu, W. Hai, H. Zhong, and Q. Xie, Phys. Rev. A, 81:063423, 2010.

[4] P. Cheinet, S. Trotzky, M. Feld, U. Schnorrberger, M. Moreno-Cardoner, S. Fölling, and I. Bloch, Phys. Rev. Lett., 101:090404, 2008.