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arXiv · 1105.0744

Designing Robust Unitary Gates: Application to Concatenated Composite Pulse

Tsubasa Ichikawa·Masamitsu Bando·Yasushi Kondo·Mikio Nakahara
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Abstract

We propose a simple formalism to design unitary gates robust against given systematic errors. This formalism generalizes our previous observation [Y. Kondo and M. Bando, J. Phys. Soc. Jpn. 80, 054002 (2011)] that vanishing dynamical phase in some composite gates is essential to suppress amplitude errors. By employing our formalism, we naturally derive a new composite unitary gate which can be seen as a concatenation of two known composite unitary operations. The obtained unitary gate has high fidelity over a wider range of the error strengths compared to existing composite gates.

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Tsubasa Ichikawa, Masamitsu Bando, Yasushi Kondo, Mikio Nakahara. 2011-11-23. Designing Robust Unitary Gates: Application to Concatenated Composite Pulse. https://doi.org/10.1103/physreva.84.062311

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