All-optical non-demolition measurement of single-hole spin in a quantum-dot molecule

Details All-optical non-demolition measurement of single-hole spin in a quantum-dot molecule All-optical non-demolition measurement of single-hole spin in a quantum-dot molecule

2006-04-18

arxiv.org/abs/cond-mat/0604415v1

Appl. Phys. Lett. 90, 144103 (2007).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1063/1.2719637

We propose an all-optical scheme to perform a non-demolition measurement of a single hole spin localized in a quantum-dot molecule. The latter is embedded in a microcavity and driven by two lasers. This allows to induce Raman transitions which entangle the spin state with the polarization of the emitted photons. We find that the measurement can be completed with high fidelity on a timescale of 100 ps, shorter than the typical T2. Furthermore, we show that the scheme can be used to induce and observe spin oscillations without the need of time-dependent magnetic fields.

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