Selective spin coupling through a single exciton

Details Selective spin coupling through a single exciton Selective spin coupling through a single exciton

2004-03-30

arxiv.org/abs/quant-ph/0403225v2

Phys. Rev. Lett. 93, 150502 (2004)

Physics

Quantum Physics

5 pages, 3 figures; published version, equation formatting improved, references added

Scientific paper

10.1103/PhysRevLett.93.150502

We present a novel scheme for performing a conditional phase gate between two spin qubits in adjacent semiconductor quantum dots through delocalized single exciton states, formed through the inter-dot Foerster interaction. We consider two resonant quantum dots, each containing a single excess conduction band electron whose spin embodies the qubit. We demonstrate that both the two-qubit gate, and arbitrary single-qubit rotations, may be realized to a high fidelity with current semiconductor and laser technology.

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