Single-shot initialization of electron spin in a quantum dot using a short optical pulse

Details Single-shot initialization of electron spin in a quantum dot using a short optical pulse Single-shot initialization of electron spin in a quantum dot using a short optical pulse

2010-11-04

arxiv.org/abs/1011.1156v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We propose a technique to initialize an electron spin in a semiconductor quantum dot with a single short optical pulse. It relies on the fast depletion of the initial spin state followed by a preferential, Purcell-accelerated desexcitation towards the desired state thanks to a micropillar cavity. We theoretically discuss the limits on initialization rate and fidelity, and derive the pulse area for optimal initialization. We show that spin initialization is possible using a single optical pulse down to a few tens of picoseconds wide.

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