Zu Hauptinhalt springen

Interacting quantum dots

Quantum dots are small conductors where the interplay between size quantization and electronic interactions gives rise to intricate many-body phenomena like interaction driven dark-states formation or the Kondo effect.
We have developed various theoretical methods, encampassing quantum master quation approaches or Keldysh field theories to cope with such intricacies.

Image: Author - Leonhard Mayrhofer

Coulomb diamonds and 4 electron periodicity in a carbon nanotube quantum dot

See some key publications:

Fano stability diagram of a symmetric triple quantum dot
Michael Niklas, Andreas Trottmann, Andrea Donarini und Milena Grifoni
arXiv (2016)

Transport across an Anderson quantum dot in the intermediate coupling regime
Johannes Kern und Milena Grifoni
Eur. Phys. J. B 86, 384 (2013)

Nonequilibrium Kondo transport through a quantum dot in a magnetic field
Sergey Smirnov und Milena Grifoni
New Journal of Physics 15, 073047-1 (2013)

Keldysh effective action theory for universal physics in spin-1/2 Kondo dots
Sergey Smirnov und Milena Grifoni
Phys. Rev. B 87, 121302 (2013)

Spin-channel Keldysh field theory for weakly interacting quantum dots
Sergey Smirnov und Milena Grifoni
Phys. Rev. B 85, 195310 (2012)

Performance analysis of an interacting quantum dot thermoelectric setup
Bhaskaran Muralidharan und Milena Grifoni
Phys. Rev. B 85, 155423 (2012)

Kondo effect in interacting nanoscopic systems: Keldysh field integral theory
Sergey Smirnov und Milena Grifoni
Phys. Rev. B 84, 235314 (2011)

Dynamical symmetry breaking in vibration-assisted transport through nanostructures
Abdullah Yar, Andrea Donarini, Sonja Koller und Milena Grifoni
Phys. Rev. B 84, 115432 (2011)

Density-operator approaches to transport through interacting quantum dots: Simplifications in fourth-order perturbation theory
S. Koller, M. Leijnse, M. R. Wegewijs und Milena Grifoni
Phys. Rev. B 82, 235307 (2010)

Inelastic cotunneling in quantum dots and molecules with weakly broken degeneracies
Georg Begemann, Sonja Koller, Milena Grifoni und Jens Paaske
Phys. Rev. B 82, 045316 (2010)

Linear and nonlinear transport across carbon nanotube quantum dots
Leonhard Mayrhofer und Milena Grifoni
Eur. Phys. J. B 56, 107 (2007)

Non-Fermi-liquid behavior in transport across carbon nanotube quantum dots
Leonhard Mayrhofer und Milena Grifoni
Phys. Rev. B 74, 121403(R) (2006)

Correlated sequential tunneling in Tomonaga-Luttinger liquid quantum dots
Michael Thorwart, R. Egger und Milena Grifoni
phys. status solidi b 242, 218-225 (2005)


QTS Research - Working Group Grifoni

Quantum Transport and Spintronics

A two-state system

Institut I - Theoretische Physik
Universität Regensburg
Universitätsstraße 31
D-93053 Regensburg