Entanglement and errors in the control of spins by optical coupling

Details Entanglement and errors in the control of spins by optical coupling Entanglement and errors in the control of spins by optical coupling

2005-03-17

arxiv.org/abs/cond-mat/0503446v1

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

10.1103/PhysRevB.72.045334

We analyze the optical quantum control of impurity spins in proximity to a quantum dot. A laser pulse creates an exciton in the dot and controls the spins by indirect coupling. We show how to determine the control parameters using as an illustration the production of maximal spin entanglement. We consider errors in the quantum control due to the exciton radiative recombination. The control errors in the adiabatic and nonadiabatic case are compared to the threshold needed for scalable quantum computing.

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