Detecting entanglement using a double quantum dot turnstile

Details Detecting entanglement using a double quantum dot turnstile Detecting entanglement using a double quantum dot turnstile

2005-02-02

arxiv.org/abs/cond-mat/0502060v3

Phys. Rev. Lett. 95, 160402 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 2 figures - published version

Scientific paper

10.1103/PhysRevLett.95.160402

We propose a scheme based on using the singlet ground state of an electron spin pair in a double quantum dot nanostructure as a suitable set-up for detecting entanglement between electron spins via the measurement of an optimal entanglement witness. Using time-dependent gate voltages and magnetic fields the entangled spins are separated and coherently rotated in the quantum dots and subsequently detected at spin-polarized quantum point contacts. We analyze the coherent time evolution of the entangled pair and show that by counting coincidences in the four exits an entanglement test can be done. This set-up is close to present-day experimental possibilities and can be used to produce pairs of entangled electrons ``on demand''.

Affiliated with

Also associated with

No associations

Rating

Detecting entanglement using a double quantum dot turnstile 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 Detecting entanglement using a double quantum dot turnstile, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detecting entanglement using a double quantum dot turnstile will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-60867