Suppressing Coherent Gauge Drift in Quantum Simulations

• URL: http://arxiv.org/abs/2005.12688v1
• Date: Tue, 26 May 2020 13:12:27 GMT
• Title: Suppressing Coherent Gauge Drift in Quantum Simulations
• Authors: Henry Lamm, Scott Lawrence, and Yukari Yamauchi (for the NuQS Collaboration)
• Abstract summary: For gauge theories, a large class of errors violate gauge symmetry, and thus may result in unphysical processes occurring in the simulation. We present a method, applicable to non-Abelian gauge theories, for suppressing coherent gauge drift errors through the repeated application of pseudorandom gauge transformation.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Simulations of field theories on noisy quantum computers must contend with errors introduced by that noise. For gauge theories, a large class of errors violate gauge symmetry, and thus may result in unphysical processes occurring in the simulation. We present a method, applicable to non-Abelian gauge theories, for suppressing coherent gauge drift errors through the repeated application of pseudorandom gauge transformation. In cases where the dominant errors are gauge-violating, we expect this method to be a practical way to improve the accuracy of NISQ-era simulations.

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