Spectrum of an electron spin coupled to an unpolarized bath of nuclear spins

Details Spectrum of an electron spin coupled to an unpolarized bath of nuclear spins Spectrum of an electron spin coupled to an unpolarized bath of nuclear spins

2011-02-11

arxiv.org/abs/1102.2426v1

Phys. Rev. Lett. 106, 106803 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages, 3 figures

Scientific paper

The main source of decoherence for an electron spin confined to a quantum dot is the hyperfine interaction with nuclear spins. To analyze this process theoretically we diagonalize the central spin Hamiltonian in the high magnetic B-field limit. Then we project the eigenstates onto an unpolarized state of the nuclear bath and find that the resulting density of states has Gaussian tails. The level spacing of the nuclear sublevels is exponentially small in the middle of each of the two electron Zeeman levels but increases super-exponentially away from the center. This suggests to select states from the wings of the distribution when the system is projected on a single eigenstate by a measurement to reduce the noise of the nuclear spin bath. This theory is valid when the external magnetic field is larger than a typical Overhauser field at high nuclear spin temperature.

Affiliated with

Also associated with

No associations

Rating

Spectrum of an electron spin coupled to an unpolarized bath of nuclear spins 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 Spectrum of an electron spin coupled to an unpolarized bath of nuclear spins, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectrum of an electron spin coupled to an unpolarized bath of nuclear spins will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-84320