Dresden 2009 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 22: Correlated Electrons: Quantum-Critical Phenomena 2

TT 22.10: Talk

Wednesday, March 25, 2009, 12:15–12:30, HSZ 03

Color Superfluidity and Trion Formation in Ultracold Fermionic Systems — •Akos Rapp — Institut für Theoretische Physik, Universität zu Köln, Zülpicher Str. 77 D-50937 Cologne Germany

We investigate the low temperature properties of the three component Hubbard model. This system might be realized by trapping 3 different hyperfine states of ultracold Li-6 atoms in optical lattices. Studies concerning the SU(3) symmetric attractive case based on a Gutzwiller variational method in d=∞ suggest (see Phys. Rev. Lett. 98, 160405 (2007) and Phys. Rev. B 77, 144520 (2008)) that there is a continuous phase transition happening between a weak coupling color superfluid and a strong coupling trionic ground state. We construct and investigate the properties of the quantum field theory describing this quantum phase transition.