A turnstile electron-spin entangler in semiconductors

Details A turnstile electron-spin entangler in semiconductors A turnstile electron-spin entangler in semiconductors

2003-05-21

arxiv.org/abs/cond-mat/0305494v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages, 1 figure; to appear in Appl. Phys. Lett

Scientific paper

10.1063/1.1590425

We propose a single-electron doped quantum dot in a field-effect structure as an optically triggered turnstile for spin-entangled electrons. A short laser pulse excites a charged exciton, whose quantum properties are transferred through tunneling and relaxation to the spin entanglement between electrons in the dot and contact. We identify the pertinent disentanglement mechanisms, and discuss experimental detection and possible application schemes.

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