Phys. Rev. Lett. 83, 4204–4207 (1999)Quantum Information Processing Using Quantum Dot Spins and Cavity QEDReceived 27 April 1999; revised 15 July 1999; published in the issue dated 15 November 1999 The electronic spin degrees of freedom in semiconductors typically have decoherence times that are several orders of magnitude longer than other relevant time scales. A solid-state quantum computer based on localized electron spins as qubits is therefore of potential interest. Here, a scheme that realizes controlled interactions between two distant quantum dot spins is proposed. The effective long-range interaction is mediated by the vacuum field of a high finesse microcavity. By using conduction-band-hole Raman transitions induced by classical laser fields and the cavity-mode, parallel controlled-not operations, and arbitrary single qubit rotations can be realized. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.83.4204
DOI:
10.1103/PhysRevLett.83.4204
PACS:
03.67.Lx, 42.50.Dv, 73.61.-r
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