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cond-mat.str-el2007★ 120 cited
Mott transition of fermionic atoms in a three-dimensional optical trap
R. W. Helmes, T. A. Costi, A. Rosch
We study theoretically the Mott metal-insulator transition for a system of fermionic atoms confined in a three-dimensional optical lattice and a harmonic trap. We describe an inhom…
cond-mat.str-el2007★ 40 cited
Quantum phase transition in the two-band Hubbard model
T. A. Costi, A. Liebsch
The interaction between itinerant and Mott localized electronic states in strongly correlated materials is studied within dynamical mean field theory in combination with the numeri…
cond-mat.str-el2007★ 1.5k cited
The numerical renormalization group method for quantum impurity systems
Ralf Bulla, Theo Costi, Thomas Pruschke
In the beginning of the 1970's, Wilson developed the concept of a fully non-perturbative renormalization group transformation. Applied to the Kondo problem, this numerical renormal…