Suche

Suchergebnisse

• "Interference effects in the Coulomb blockade regime: Current blocking and spin preparation in symmetric nanojunctions", Donarini, Begemann, Grifoni, 2010

  Publikation

  We consider nanojunctions in the single-electron tunneling regime which, due to a high degree of spatial symmetry, have a degenerate many-body...

  Publikation auf epub.uni-regensburg.de: "Interference effects in the Coulomb blockade regime: Current blocking and spin preparation in symmetric nanojunctions" (externer Link, öffnet neues Fenster)

• "Density-operator approaches to transport through interacting quantum dots: Simplifications in fourth-order perturbation theory", Koller, Leijnse, Wegewijs, Grifoni, 2010

  Publikation

  Various theoretical methods address transport effects in quantum dots beyond single-electron tunneling while accounting for the strong interactions in...

  Publikation auf epub.uni-regensburg.de: "Density-operator approaches to transport through interacting quantum dots: Simplifications in fourth-order perturbation theory" (externer Link, öffnet neues Fenster)

• "Qubit-oscillator system: An analytical treatment of the ultrastrong coupling regime", Hausinger, Grifoni, 2010

  Publikation

  We examine a two-level system coupled to a quantum oscillator, typically representing experiments in cavity and circuit quantum electrodynamics. We...

  Publikation auf epub.uni-regensburg.de: "Qubit-oscillator system: An analytical treatment of the ultrastrong coupling regime" (externer Link, öffnet neues Fenster)

• "Dynamics of a qubit coupled to a dissipative nonlinear quantum oscillator: An effective-bath approach", Vierheilig, Bercioux, Grifoni, 2011

  Publikation

  We consider a qubit coupled to a nonlinear quantum oscillator, the latter coupled to an Ohmic bath, and investigate the qubit dynamics. This composed...

  Publikation auf epub.uni-regensburg.de: "Dynamics of a qubit coupled to a dissipative nonlinear quantum oscillator: An effective-bath approach" (externer Link, öffnet neues Fenster)

• "Direct Observation of Band-Gap Closure for a Semiconducting Carbon Nanotube in a Large Parallel Magnetic Field", Jhang, Marganska, Skourski, Preusche, Grifoni, Wosnitza, Strunk, 2011

  Publikation

  We have investigated the magnetoconductance of semiconducting carbon nanotubes (CNTs) in pulsed, parallel magnetic fields up to 60 T, and report the...

  Publikation auf epub.uni-regensburg.de: "Direct Observation of Band-Gap Closure for a Semiconducting Carbon Nanotube in a Large Parallel Magnetic Field" (externer Link, öffnet neues Fenster)

• "Qubit-oscillator system under ultrastrong coupling and extreme driving", Hausinger, Grifoni, 2011

  Publikation

  We introduce an approach to studying a driven qubit-oscillator system in the ultrastrong coupling regime, where the ratio g/Omega between coupling...

  Publikation auf epub.uni-regensburg.de: "Qubit-oscillator system under ultrastrong coupling and extreme driving" (externer Link, öffnet neues Fenster)

• "Localization induced by magnetic fields in carbon nanotubes", Marganska, del Valle, Jhang, Strunk, Grifoni, 2011

  Publikation

  The electronic spectra of long carbon nanotubes (CNTs) can, to a very good approximation, be obtained using the dispersion relation of graphene with...

  Publikation auf epub.uni-regensburg.de: "Localization induced by magnetic fields in carbon nanotubes" (externer Link, öffnet neues Fenster)

• "Symmetry fingerprints of a benzene single-electron transistor: Interplay between Coulomb interaction and orbital symmetry", Begemann, Darau, Donarini, Grifoni, 2008

  Publikation

  The interplay between Coulomb interaction and orbital symmetry produces specific transport characteristics in molecular single electron transistors...

  Publikation auf epub.uni-regensburg.de: "Symmetry fingerprints of a benzene single-electron transistor: Interplay between Coulomb interaction and orbital symmetry" (externer Link, öffnet neues Fenster)

• "Quantum Dissipative Rashba Spin Ratchets", Smirnov, Bercioux, Grifoni, Richter, 2008

  Publikation

  We predict the possibility to generate a finite stationary spin current by applying an unbiased ac driving to a quasi-one-dimensional asymmetric...

  Publikation auf epub.uni-regensburg.de: "Quantum Dissipative Rashba Spin Ratchets" (externer Link, öffnet neues Fenster)

• "Transport through a double-quantum-dot system with noncollinearly polarized leads", Hornberger, Koller, Begemann, Donarini, Grifoni, 2008

  Publikation

  We investigate linear and nonlinear transport in a double quantum dot system weakly coupled to spin-polarized leads. In the linear regime, the...

  Publikation auf epub.uni-regensburg.de: "Transport through a double-quantum-dot system with noncollinearly polarized leads" (externer Link, öffnet neues Fenster)