Two qubit conditional quantum logic operation in a single self-assembled quantum dot

Details Two qubit conditional quantum logic operation in a single self-assembled quantum dot Two qubit conditional quantum logic operation in a single self-assembled quantum dot

2008-02-29

arxiv.org/abs/0802.4368v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4- pages, 4 figures, to be submitted to PRL

Scientific paper

10.1103/PhysRevB.78.075301

The four-level exciton/biexciton system of a single semiconductor quantum dot acts as a two qubit register. We experimentally demonstrate an exciton-biexciton Rabi rotation conditional on the initial exciton spin in a single InGaAs/GaAs dot. This forms the basis of an optically gated two-qubit controlled-rotation (CROT) quantum logic operation where an arbitrary exciton spin is selected as the target qubit using the polarization of the control laser.

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