Phys. Rev. Lett. 75, 4710–4713 (1995)Measurement of Conditional Phase Shifts for Quantum LogicReceived 12 June 1995; published in the issue dated 18 December 1995 Measurements of the birefringence of a single atom strongly coupled to a high-finesse optical resonator are reported, with nonlinear phase shifts observed for an intracavity photon number much less than one. A proposal to utilize the measured conditional phase shifts for implementing quantum logic via a quantum-phase gate (QPG) is considered. Within the context of a simple model for the field transformation, the parameters of the "truth table" for the QPG are determined. © 1995 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.75.4710
DOI:
10.1103/PhysRevLett.75.4710
PACS:
89.80.+h, 32.80.-t, 33.55.Ad, 42.65.Pc
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