2014/05/31 by I. V. Inlek, G. Vittorini, D. Hucul +2 · 1 citation
Physics and Astronomy · #quant-ph
paper · pdf · doi:10.1103/physreva.90.042316
published as Phys. Rev. A 90, 042316 (2014)
arxiv created 2014/09/02 · arxiv updated 2014/11/06
The performance of a quantum information processor depends on the precise control of phases introduced into the system during quantum gate operations. As the number of operations increases with the complexity of a computation, the phases of gates at different locations and different times must be controlled, which can be challenging for optically-driven operations. We circumvent this issue by demonstrating an entangling gate between two trapped atomic ions that is insensitive to the optical phases of the driving fields, while using a common master reference clock for all coherent qubit operations. Such techniques may be crucial for scaling to large quantum information processors in many physical platforms.