In this talk, I will present our recent work on an experimental scanning-based tomography approach for near-term quantum devices. It is based on a Wigner-type DROPS representation of quantum states and operators. These representations provide a rich visualization of quantum operators using shapes assembled from a linear combination of spherical harmonics. These shapes (also called droplets) can be experimentally tomographed by measuring the expectation values of rotated axial tensor operators. We present an experimental framework for implementing the scanning-based tomography technique for circuit-based quantum computers and showcase results from IBM quantum experience. We also present a method for estimating the density and process matrices from experimentally tomographed Wigner functions (droplets).
The talk will be based on the following paper:
Devra, A., Glaser, N. J., Huber, D., & Glaser, S. J. (2023). Wigner State and Process Tomography on Near-Term Quantum Devices. https://arxiv.org/abs/2302.12725
