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Measurement of conditional phase shifts for quantum logic
Preprint
1995-11-07
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Abstract
Measurements of the birefringence of a single atom strongly coupled to a high-finesse
optical resonator are reported, with nonlinear phase shifts observed for 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.