Nonequilibrium stabilization of charge states in double quantum dots

Details Nonequilibrium stabilization of charge states in double quantum dots Nonequilibrium stabilization of charge states in double quantum dots

2003-02-27

arxiv.org/abs/cond-mat/0302572v2

Phys. Rev. B 69, 161309(R) (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 5 figures

Scientific paper

10.1103/PhysRevB.69.161309

We analyze the decoherence of charge states in double quantum dots due to cotunneling. The system is treated using the Bloch-Redfield generalized master equation for the Schrieffer-Wolff transformed Hamiltonian. We show that the decoherence, characterized through a relaxation $\tau_{r}$ and a dephasing time $\tau_{\phi}$, can be controlled through the external voltage and that the optimum point, where these times are maximum, is not necessarily in equilibrium. We outline the mechanism of this nonequilibrium-induced enhancement of lifetime and coherence. We discuss the relevance of our results for recent charge qubit experiments.

Affiliated with

Also associated with

No associations

Rating

Nonequilibrium stabilization of charge states in double 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 Nonequilibrium stabilization of charge states in double quantum dots, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nonequilibrium stabilization of charge states in double quantum dots will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-330696