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Dissipative spin-boson model and Kondo effect in low dimensional quantum gases
A. Recati, P. O. Fedichev, W. Zwerger +2
We show that ultracold atoms confined in a quasi-1d trap can be used to study the dissipative spin-boson model with {\it tunable} tunneling splitting and strength of dissipation. I…
Fermi 1D quantum gas: Luttinger liquid approach and spin-charge separation
A. Recati, P. O. Fedichev, W. Zwerger +1
We discuss the properties of quasi-1D quantum gases of fermionic atoms using the Luttinger liquid theory, including the presence of an optical lattice and of a longitudinal trappin…
Mott-Hubbard transition of cold atoms in optical lattices
W. Zwerger
We discuss the superfluid to Mott-insulator transition of cold atoms in optical lattices recently observed by Greiner et.al. (Nature 415, 39 (2002)). The fundamental properties of…
Commensurate-incommensurate transition of cold atoms in an optical lattice
H. P. Büchler, G. Blatter, W. Zwerger
An atomic gas subject to a commensurate periodic potential generated by an optical lattice undergoes a superfluid--Mott insulator transition. Confining a strongly interacting gas t…