Online Seminar: A/Prof Robin Blume-Kohout, Sandia Nat. Labs
A framework for defining and classifying crosstalk errors in quantum processors
Understanding Crosstalk in Quantum Processors
SPEAKER: A/Prof Robin Blume-Kohout
AFFILIATION: Quantum Performance Lab, Sandia National Laboratories, Albuquerque, New Mexico
HOSTED BY: A/Prof Chris Ferrie, UTS Centre for Quantum Software and Information
ABSTRACT:
Multi-qubit quantum processors fail – i.e., deviate from ideal behavior – in many ways. One of the most important, especially as the number of qubits grows, is crosstalk. But “crosstalk” refers to a wide range of distinct phenomena.
In this talk, I will present a precise and rigorous framework that we have developed for defining and classifying crosstalk errors, and compare it to existing ad hoc definitions. Then, I will present two protocols that we are deploying to detect and characterize crosstalk, and show how we are using them to break down and demystify the error behavior of testbed-class quantum processors in the wild.