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cond-mat2003
Chaos and the Quantum Phase Transition in the Dicke Model
Clive Emary, Tobias Brandes
We investigate the quantum chaotic properties of the Dicke Hamiltonian; a quantum-optical model which describes a single-mode bosonic field interacting with an ensemble of two-…
cond-mat1996
Critical dynamics and multifractal exponents at the Anderson transition in 3d disordered systems
Tobias Brandes, Bodo Huckestein, Ludwig Schweitzer
We investigate the dynamics of electrons in the vicinity of the Anderson transition in dimensions. Using the exact eigenstates from a numerical diagonalization, a number of q…