Quantum Dots for Quantum Logic

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Abstract

729 Quantum Dots for Quantum Logic Although several technologies are being pursued for coherent quantum information processing, solid-state systems may prove the simplest to implement on a wide scale. Li et al. (p. 809) demonstrate a conditional quantum logic gate in which two qubits, each consisting of an exciton (an electron-hole pair), are coupled together in a single quantum dot. These qubits can be manipulated coherently with polarized light and can perform logical operations with a fidelity of 0.7.