München 2004 – scientific programme
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Q: Quantenoptik und Photonik
Q 52: Postdeadline
Q 52.6: Talk
Thursday, March 25, 2004, 20:50–21:00, HS 225
Tonks gas in an optical lattice — •Belén Paredes1, Artur Widera1,2,3, Valentin Murg1, Olaf Mandel1,2,3, Simon Fölling1,2,3, Ignacio Cirac1, Gora V. Shlyapnikov4, Theodor W. Hänsch1,2, and Immanuel Bloch1,2,3 — 1Max-Planck-Institut für Quantenoptik, D-85748 Garching, Germany. — 2Sektion Physik, Ludwig-Maximilians-Universität, Schellingstrasse 4/III, D-80799 Munich, Germany. — 3Institut für Physik, Johannes Gutenberg-Universität, D-55099 Mainz, Germany. — 4Laboratoire Physique Thèorique et Modèles Statistique, Université Paris Sud, Bâ
Strongly correlated quantum systems are among the most challenging and intriguing systems in physics. Here the Tonks-Girardeau gas proposed about 40 years ago, is especially remarkable. In such a gas, bosonic particles are confined to one dimension, and they are prevented to be at the same position in space due to the strong repulsive interactions between them. This mimics Pauli’s exclusion principle, resulting in pronounced fermionic properties of the bosonic particles. Interestingly however, these fermionized bosons do not exhibit either completely ideal bosonic or fermionic quantum behaviour, which is for example reflected in their characteristic momentum distribution. Here we report on the preparation of a Tonks-Girardeau gas in an optical lattice. We measure the momentum distribution and compare it with our theoretical prediction based on a fermionization approach, observing a remarkable agreement.