Non-Gaussian Noise Spectroscopy with a Superconducting Qubit
Youngkyu Sung, Félix Beaudoin, Leigh Norris +9 more
Most quantum control and quantum error-correction
protocols assume that the noise causing decoherence is described by
Gaussian statistics. However, the Gaussianity assumption breaks
down when the quantum system is strongly coupled to a sparse
environment or has a non-linear response to external degrees of
freedom. Here, we experimentally validate an open-loop quantum
control protocol that reconstructs the higher-order spectrum of a
non-Gaussian dephasing process using a superconducting qubit as a
noise spectrometer. This experimental demonstration of non-Gaussian
noise spectroscopy protocol represents a major step towards the
goal of demonstrating a complete noise spectral characterization of
quantum devices.
Bulletin of the American Physical Society•Jan 1, 2018•0 citations