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• "Nonlinear acoustic response of amorphous metals in the tunneling model", Stockburger, Grifoni, Sassetti, Weiss, 1994

  Publikation

  The nonlinear nature of the acoustic response of metallic glasses at very low temperatures, which has defied a satisfactory theoretical description...

  Publikation auf epub.uni-regensburg.de: "Nonlinear acoustic response of amorphous metals in the tunneling model" (externer Link, öffnet neues Fenster)

• "Nonlinear acoustic response of glasses in the tunneling model", Stockburger, Grifoni, Sassetti, 1995

  Publikation

  The nonlinear acoustic response of low-energy excitations in insulating glasses is investigated using the tunneling model. An explicit evaluation of...

  Publikation auf epub.uni-regensburg.de: "Nonlinear acoustic response of glasses in the tunneling model" (externer Link, öffnet neues Fenster)

• "Cooperative effects in the nonlinearly driven spin-boson system", Grifoni, Sassetti, Hänggi, Weiss, 1995

  Publikation

  We study the quantum dynamics of a periodically driven biased two-state system which additionally is subject to either Ohmic or to frequency-dependent...

  Publikation auf epub.uni-regensburg.de: "Cooperative effects in the nonlinearly driven spin-boson system" (externer Link, öffnet neues Fenster)

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

  Publikation

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

  Publikation auf epub.uni-regensburg.de: "Exact master equations for driven dissipative tight-binding models" (externer Link, öffnet neues Fenster)

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

  Publikation

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

  Publikation auf epub.uni-regensburg.de: "Coherent and Incoherent Quantum Stochastic Resonance" (externer Link, öffnet neues Fenster)

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

  Publikation

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

  Publikation auf epub.uni-regensburg.de: "Quantum tunneling and stochastic resonance" (externer Link, öffnet neues Fenster)

• "Nonlinear quantum stochastic resonance", Grifoni, Hänggi, 1996

  Publikation

  We investigate quantum stochastic resonance (QSR) in the periodically driven spin-boson system with Ohmic dissipation. For the special case α=1/2 of...

  Publikation auf epub.uni-regensburg.de: "Nonlinear quantum stochastic resonance" (externer Link, öffnet neues Fenster)

• "Dynamics of the dissipative two-state system under ac modulation of bias and coupling energy", Grifoni, 1996

  Publikation

  We consider a driven dissipative two-state system subject to periodic modulation of both of its two parameters. The exact master equation that governs...

  Publikation auf epub.uni-regensburg.de: "Dynamics of the dissipative two-state system under ac modulation of bias and coupling energy" (externer Link, öffnet neues Fenster)

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

  Publikation

  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...

  Publikation auf epub.uni-regensburg.de: "Comment on “Transient dynamics of Ohmic dissipative two-level systems driven by dc-ac fields” by Wang and Zhao" (externer Link, öffnet neues Fenster)

• "Dissipative tunneling with periodic polychromatic driving: Exact results and tractable approximations", Grifoni, Hartmann, Hänggi, 1997

  Publikation

  We investigate the long-time dynamics in dissipative two-level-systems (TLS) when driven by — monochromatic or pulse-shaped — periodic fields. The...

  Publikation auf epub.uni-regensburg.de: "Dissipative tunneling with periodic polychromatic driving: Exact results and tractable approximations" (externer Link, öffnet neues Fenster)