Phys.org  January 26, 2022 Traditionally, noise on the quantum device is characterized directly through qubit and gate measurements, but this approach has drawbacks as it does not adequately capture the effect of noise on realistic multi-qubit applications. A team of researchers in the US (University of Chicago, Purdue University) simulated the relaxation of stationary quantum states on a quantum computer to obtain a unique spectroscopic fingerprint of the computer’s noise. In contrast to traditional approaches, they obtained the frequency profile of the noise as it is experienced by the simulated stationary quantum states. Data from multiple superconducting-qubit IBM processors shows […]