Dynamical 1/N approach to time-dependent currents through quantum dots

Details Dynamical 1/N approach to time-dependent currents through quantum dots Dynamical 1/N approach to time-dependent currents through quantum dots

2003-05-05

arxiv.org/abs/cond-mat/0305080v2

Phys. Rev. B69, 115304 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

18 pages, 7 eps figures, discussion extended for spinless electrons and typos

Scientific paper

10.1103/PhysRevB.69.115304

A systematic truncation of the many-body Hilbert space is implemented to study how electrons in a quantum dot attached to conducting leads respond to time-dependent biases. The method, which we call the dynamical 1/N approach, is first tested in the most unfavorable case, the case of spinless fermions (N=1). We recover the expected behavior, including transient ringing of the current in response to an abrupt change of bias. We then apply the approach to the physical case of spinning electrons, N=2, in the Kondo regime for the case of infinite intradot Coulomb repulsion. In agreement with previous calculations based on the non-crossing approximation (NCA), we find current oscillations associated with transitions between Kondo resonances situated at the Fermi levels of each lead. We show that this behavior persists for a more realistic model of semiconducting quantum dots in which the Coulomb repulsion is finite.

Affiliated with

Also associated with

No associations

Rating

Dynamical 1/N approach to time-dependent currents through quantum dots does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Dynamical 1/N approach to time-dependent currents through quantum dots, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamical 1/N approach to time-dependent currents through quantum dots will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-41205