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• "Dissipative transport in dc-ac–driven tight-binding lattices", Hartmann, Grifoni, Hänggi, 1997

  Publication

  We investigate the incoherent dissipative quantum transport of a particle in a periodic lattice being driven nonlinearly by dc-ac fields. The particle...

  Publication on epub.uni-regensburg.de: "Dissipative transport in dc-ac–driven tight-binding lattices" (external link, opens in a new window)

• "Nonadiabatic Quantum Brownian Rectifiers", Goychuk, Grifoni, Hänggi, 1998

  Publication

  We study both dissipative and nondissipative quantum transport in discrete Brownian rectifiers being driven by nonthermal noise that is unbiased on...

  Publication on epub.uni-regensburg.de: "Nonadiabatic Quantum Brownian Rectifiers" (external link, opens in a new window)

• "Variational states for the spin-Peierls system", Frahm, Schliemann, 1997

  Publication

  We introduce a family of Jastrow pair product states for quasi-one-dimensional spin systems. Depending on a parameter they interpolate between the...

  Publication on epub.uni-regensburg.de: "Variational states for the spin-Peierls system" (external link, opens in a new window)

• "Semiclassical description of Heisenberg models via spin-coherent states", Schliemann, Mertens, 1998

  Publication

  We use spin-coherent states as the basis of a time-dependent variational ansatz for a semiclassical description of a large family of Heisenberg...

  Publication on epub.uni-regensburg.de: "Semiclassical description of Heisenberg models via spin-coherent states" (external link, opens in a new window)

• "Quantum Ratchets", Reimann, Grifoni, Hänggi, 1997

  Publication

  We investigate quantum Brownian motion in adiabatically rocked ratchet systems. Above a crossover temperature Tc tunneling events are rare, yet they...

  Publication on epub.uni-regensburg.de: "Quantum Ratchets" (external link, opens in a new window)

• "Dissipation, decoherence and preparation effects in the spin-boson system", Grifoni, Paladino, Weiss, 1999

  Publication

  The dynamics of the reduced density matrix of the driven dissipative two-state system is studied for a general diagonal/off-diagonal initial state. We...

  Publication on epub.uni-regensburg.de: "Dissipation, decoherence and preparation effects in the spin-boson system" (external link, opens in a new window)

• "Plasmon and charge quantization effects in a double-barrier quantum wire", Braggio, Grifoni, Sassetti, Napoli, 2000

  Publication

  The nonlinear transport properties of a single-channel quantum wire in the presence of two impurities are investigated. Treating the electron...

  Publication on epub.uni-regensburg.de: "Plasmon and charge quantization effects in a double-barrier quantum wire" (external link, opens in a new window)

• "Bilayer Quantum Hall Systems at Filling Factor nu=2: An Exact Diagonalization Study", Schliemann, MacDonald, 2000

  Publication

  We present an exact diagonalization study of bilayer quantum Hall systems at filling factor ν = 2 in the spherical geometry. We find the...

  Publication on epub.uni-regensburg.de: "Bilayer Quantum Hall Systems at Filling Factor nu=2: An Exact Diagonalization Study" (external link, opens in a new window)

• "Driven tunneling dynamics: Bloch-Redfield theory versus path-integral approach", Hartmann, Goychuk, Grifoni, Hänggi, 2000

  Publication

  In the regime of weak bath coupling and low temperature we demonstrate numerically for the spin-boson dynamics the equivalence between two widely used...

  Publication on epub.uni-regensburg.de: "Driven tunneling dynamics: Bloch-Redfield theory versus path-integral approach" (external link, opens in a new window)

• "On the semiclassical treatment of anharmonic quantum oscillators via coherent states - the Toda chain revisited", Schliemann, Mertens, 1999

  Publication

  We use coherent states as a time-dependent variational ansatz for a semiclassical treatment of the dynamics of anharmonic quantum oscillators. In this...

  Publication on epub.uni-regensburg.de: "On the semiclassical treatment of anharmonic quantum oscillators via coherent states - the Toda chain revisited" (external link, opens in a new window)