Ground state of the parallel double quantum dot system

Details Ground state of the parallel double quantum dot system Ground state of the parallel double quantum dot system

2011-11-18

arxiv.org/abs/1111.4303v1

Phys. Rev. Lett. 108, 066602 (2012)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.108.066602

We resolve the controversy regarding the ground state of the parallel double quantum dot system near half filling. The numerical renormalization group (NRG) predicts an underscreened Kondo state with residual spin-1/2 magnetic moment, ln 2 residual impurity entropy, and unitary conductance, while the Bethe Ansatz (BA) solution predicts a fully screened impurity, regular Fermi-liquid ground state, and zero conductance. We calculate the impurity entropy of the system as a function of the temperature using the hybridization-expansion continuous-time quantum Monte Carlo technique, which is a numerically exact stochastic method, and find excellent agreement with the NRG results. We show that the origin of the unconventional behavior in this model is the odd-symmetry "dark state" on the dots.

Affiliated with

Also associated with

No associations

Rating

Ground state of the parallel double quantum dot system 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 Ground state of the parallel double quantum dot system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ground state of the parallel double quantum dot system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-548874