Dresden 2011 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 19: Quantum Gases: Miscellaneous

Q 19.6: Talk

Tuesday, March 15, 2011, 12:00–12:15, HÜL 386

Process-chain approach applied to the Bose-Hubbard model — •Dennis Hinrichs, Niklas Teichmann, and Martin Holthaus — Institut für Physik, Carl von Ossietzky Universität Oldenburg, 26111 Oldenburg

The process-chain approach is a powerful tool for carrying out perturbative calculations on many-body lattice systems in high order. In combination with the method of the effective potential, this technique permits us to determine the phase boundary marking the superfluid to Mott-insulator quantum phase transition for various lattice types with high accuracy [1]. Moreover, it will be shown that it also gives access to the superfluid density, and to critical exponents.

[1] N. Teichmann, D. Hinrichs, M. Holthaus, EPL 91, 10004 (2010)