Towards Quantum Gates with Wide Operating Margins

• URL: http://arxiv.org/abs/2202.10486v1
• Date: Mon, 21 Feb 2022 19:00:58 GMT
• Title: Towards Quantum Gates with Wide Operating Margins
• Authors: Ryan J. Epstein
• Abstract summary: We introduce a composite qubit and gate scheme that achieves wide margins by use of transistor-like nonlinearities. We focus on a resource-effcient variation that exploits biased noise and preserves bias under gate operation.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Scaling up quantum computing hardware is hindered by the narrow operating margins of current quantum components. Here, we introduce a composite qubit and gate scheme that achieves wide margins by use of transistor-like nonlinearities to suppress the effects of both ambient noise and control signal imperfections. This is accomplished by adiabatic deformation of subsystem codes based on anti-commuting two-body interactions. We focus on a resource-effcient variation that exploits biased noise and preserves bias under gate operation. As a proof of concept, we present simulations of a superconducting circuit that demonstrates core elements of the approach and discuss the challenges of experimental implementation.

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