Quantum Description of Nuclear Spin Cooling in a Quantum Dot

Details Quantum Description of Nuclear Spin Cooling in a Quantum Dot Quantum Description of Nuclear Spin Cooling in a Quantum Dot

2006-11-16

arxiv.org/abs/cond-mat/0611438v2

Phys. Rev. B 75, 155324 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

published version; 9 pages, 4 figures

Scientific paper

10.1103/PhysRevB.75.155324

We study theoretically the cooling of an ensemble of nuclear spins coupled to the spin of a localized electron in a quantum dot. We obtain a master equation for the state of the nuclear spins interacting with a sequence of polarized electrons that allows us to study quantitatively the cooling process including the effect of nuclear spin coherences, which can lead to ``dark states'' of the nuclear system in which further cooling is inhibited. We show that the inhomogeneous Knight field mitigates this effect strongly and that the remaining dark state limitations can be overcome by very few shifts of the electron wave function, allowing for cooling far beyond the dark state limit. Numerical integration of the master equation indicates, that polarizations larger than 90% can be achieved within a millisecond timescale.

Affiliated with

Also associated with

No associations

Rating

Quantum Description of Nuclear Spin Cooling in a Quantum Dot 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 Quantum Description of Nuclear Spin Cooling in a Quantum Dot, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum Description of Nuclear Spin Cooling in a Quantum Dot will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-622737