2004/11/09 by P. C. Haljan, Kathy-Anne Brickman, K. -A. Brickman +4 · 7 citations
Computer Science · Physics and Astronomy · #Atomic physics #Coherence (philosophical gambling strategy) #Cold Atom Physics and Bose-Einstein Condensates #Ion #Phase (matter) #Physics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum decoherence #Quantum error correction #Quantum gate #Quantum mechanics #Qubit #Spin (aerodynamics) #Trapped ion quantum computer #quant-ph
paper · pdf · doi:10.1103/physrevlett.94.153602
5 pages, 4 figures
arxiv created 2004/11/09 · openalex publication_date 2005/04/22 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Favored schemes for trapped-ion quantum logic gates use bichromatic laser fields to couple internal qubit states with external motion through a "spin-dependent force." We introduce a new degree of freedom in this coupling that reduces its sensitivity to phase decoherence. We demonstrate bichromatic spin-dependent forces on a single trapped 111Cd+ ion, and show that phase coherence of the resulting entangled states of spin and motion depends critically upon the spectral arrangement of the optical fields. This applies directly to the operation of entangling gates on multiple ions.