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cond-mat.other2006★ 58 cited
Complexity in parametric Bose-Hubbard Hamiltonians and structural analysis of eigenstates
Moritz Hiller, Tsampikos Kottos, T. Geisel
We consider a family of chaotic Bose-Hubbard Hamiltonians (BHH) parameterized by the coupling strength between neighboring sites. As increases the eigenstates undergo chang…
cond-mat.dis-nn2006★ 21 cited
Critical Fidelity
Gim Seng Ng, Joshua Bodyfelt, Tsampikos Kottos
Using a Wigner Lorentzian Random Matrix ensemble, we study the fidelity, , of systems at the Anderson metal-insulator transition, subject to small perturbations that preserve…
cond-mat.other2006★ 53 cited
Bifurcations in Resonance Widths of an Open Bose-Hubbard Dimer
M. Hiller, T. Kottos, A. Ossipov
We investigate the structure of resonance widths of a Bose-Hubbard Dimer with intersite hopping amplitude , which is coupled to continuum at one of the sites with strength .…