Tunable spin-selective loading of a silicon spin qubit

Details Tunable spin-selective loading of a silicon spin qubit Tunable spin-selective loading of a silicon spin qubit

2010-10-27

arxiv.org/abs/1010.5828v1

Phys. Rev. Lett. 106, 156804 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures, Supplemental Information

Scientific paper

The remarkable properties of silicon have made it the central material for the fabrication of current microelectronic devices. Silicon's fundamental properties also make it an attractive option for the development of devices for spintronics and quantum information processing. The ability to manipulate and measure spins of single electrons is crucial for these applications. Here we report the manipulation and measurement of a single spin in a quantum dot fabricated in a silicon/silicon-germanium heterostructure. We demonstrate that the rate of loading of electrons into the device can be tuned over an order of magnitude using a gate voltage, that the spin state of the loaded electron depends systematically on the loading voltage level, and that this tunability arises because electron spins can be loaded through excited orbital states of the quantum dot. The longitudinal spin relaxation time T1 is measured using single-shot pulsed techniques and found to be ~3 seconds at a field of 1.85 Tesla. The demonstration of single spin measurement as well as a long spin relaxation time and tunability of the loading are all favorable properties for spintronics and quantum information processing applications.

Affiliated with

Also associated with

No associations

Rating

Tunable spin-selective loading of a silicon spin qubit 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 Tunable spin-selective loading of a silicon spin qubit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tunable spin-selective loading of a silicon spin qubit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-582808