16 April 2010 High-fidelity universal quantum gates through quantum interference
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Numerical simulation results are presented which suggest that a class of non-adiabatic rapid passage sweeps first realized experimentally in 1991, and which give rise to controllable quantum interference effects observed using NMR in 2003, should be capable of implementing a universal set of quantum gates Gu that operate with high-fidelity. Gu consists of the Hadamard and NOT gates, together with variants of the phase, π/8, and controlled-phase gates. Sweep parameter values are provided which simulations indicate will produce the different gates in Gu, and for each gate, yield an operation with error probability Pe < 10-4. The simulations suggest that the universal gate set produced by these rapid passage sweeps show promise as possible elements of a fault-tolerant scheme for quantum computing.
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Ran Li, Ran Li, Frank Gaitan, Frank Gaitan, } "High-fidelity universal quantum gates through quantum interference", Proc. SPIE 7702, Quantum Information and Computation VIII, 77020U (16 April 2010); doi: 10.1117/12.851211; https://doi.org/10.1117/12.851211


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