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• "Coherent and Incoherent Quantum Stochastic Resonance", Grifoni, Hänggi, 1996

  Publication

  We study quantum stochastic resonance (QSR) in the periodically driven biased spin-boson system. The amplitude and the phase of the nonlinear response...

  Publication on epub.uni-regensburg.de: "Coherent and Incoherent Quantum Stochastic Resonance" (external link, opens in a new window)

• "Exact master equations for driven dissipative tight-binding models", Grifoni, Sassetti, Weiss, 1996

  Publication

  The dynamics of the driven dissipative two-state system is formulated in terms of an exact nonconvolutive master equation. The kernel is expressed as...

  Publication on epub.uni-regensburg.de: "Exact master equations for driven dissipative tight-binding models" (external link, opens in a new window)

• "Quantum tunneling and stochastic resonance", Grifoni, Hartmann, Berchtold, Hänggi, 1996

  Publication

  Stochastic resonance (SR) occurs in nonlinear dynamical systems when the response to a weak coherent input is enhanced by the presence of noise. While...

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

• "Comment on “Transient dynamics of Ohmic dissipative two-level systems driven by dc-ac fields” by Wang and Zhao", Grifoni, Hartmann, Hänggi, 1997

  Publication

  Recent results on the dynamics of a two-state system driven by dc-ac fields are discussed. We show that the approximation put forward in the work by...

  Publication on epub.uni-regensburg.de: "Comment on “Transient dynamics of Ohmic dissipative two-level systems driven by dc-ac fields” by Wang and Zhao" (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)

• "Dissipative tunneling control by elliptically polarized fields", Hartmann, Grifoni, Hänggi, 1998

  Publication

  The tunneling dynamics of a dissipative two-level system that is strongly driven by elliptically polarized electric fields is investigated. The...

  Publication on epub.uni-regensburg.de: "Dissipative tunneling control by elliptically polarized fields" (external link, opens in a new window)

• "Coherences and populations in the driven damped two-state system", Grifoni, Winterstetter, Weiss, 1997

  Publication

  The dynamics of the density matrix of the two-state system under the influence of time-dependent deterministic and fluctuating forces is investigated....

  Publication on epub.uni-regensburg.de: "Coherences and populations in the driven damped two-state system" (external link, opens in a new window)

• "Driven quantum tunneling", Grifoni, Hänggi, 1998

  Publication

  A contemporary review on the behavior of driven tunneling in quantum systems is presented. Diverse phenomena, such as control of tunneling, higher...

  Publication on epub.uni-regensburg.de: "Driven quantum tunneling" (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)

• "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)