Entanglement and errors in the control of spins by optical coupling

Abstract

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.

References in corpus (5)

• Selective spin coupling through a single exciton
• Theory of spin precession monitored by laser pulse
• Control of spin dynamics with laser pulses: Generation of entangled states of donor-bound electrons in a Cd1-xMnxTe quantum well
• Coherent optical control of spin-spin interaction in doped semiconductors
• Spin swap vs. double occupancy in quantum gates

Cited by in corpus (6)

• Spin-valley qubit in nanostructures of monolayer semiconductors: Optical control and hyperfine interaction
• All-electrical control of single ion spins in a semiconductor
• Long-range spin-qubit interaction mediated by microcavity polaritons
• Donor-donor interaction mediated by cavity-photons and its relation to interactions mediated by excitons and polaritons
• Multi-spin errors in the optical control of a spin quantum memory
• Efficient spin control in high-quality-factor planar micro-cavities