Optically induced spin gates in coupled quantum dots using the electron-hole exchange interaction

Abstract

We propose a fast optically induced two-qubit \textsc{c-phase} gate between two resident spins in a pair of coupled quantum dots. An excited bound state which extends over the two dots provides an effective electron-electron exchange interaction. The gate is made possible by the electron-hole exchange interaction, which isolates a single transition in the system. When combined with appropriate single qubit rotations, this gate generates an entangled state of the two spins.

References in corpus (3)

• Fast optical preparation, control and read-out of single quantum dot spin
• Selective spin coupling through a single exciton
• Quantum Computing with Spin Qubits Interacting Through Delocalized Excitons: Overcoming Hole Mixing