Measurement of Conditional Phase Shifts for Quantum Logic

1995/11/08 by Q. A. Turchette, C. J. Hood, W. Lange +3 · 49 citations
Computer Science · Engineering · Physics and Astronomy · #Mechanical and Optical Resonators #Photonic and Optical Devices #Quantum Information and Cryptography #quant-ph

paper · pdf · doi:10.1103/physrevlett.75.4710

published as Phys.Rev.Lett. 75 (1995) 4710-4713 · 4 pages in Postscript format, including 4 figures (attached as uuencoded version of a gzip-file)

arxiv created 1995/11/08 · openalex publication_date 1995/12/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

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 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.

Citations

• Quantum mechanical computers
• Quantum theory, the Church–Turing principle and the universal quantum computer

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