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

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

2008-09-11

arxiv.org/abs/0809.2110v1

Phys. Rev. B 78, 115306 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.78.115306

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.

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