2026-06-06T12:45:11Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/63242023-08-25T16:18:28Zcom_20.500.14352_14col_20.500.14352_15

Kim, Yosep Yong-Siah, Teo Daekun, Ahn Im, Dong Gil Cho, Young Wook Leuchs, Gerd Sánchez Soto, Luis Lorenzo Hynseok, Jeong Kim, Yoon-Ho 2023-06-16T15:19:04Z 2023-06-16T15:19:04Z 2020-05-27 0031-9007 10.1103/PhysRevLett.124.210401 https://hdl.handle.net/20.500.14352/6324 http://dx.doi.org/10.1103/PhysRevLett.124.210401 https://journals.aps.org Recent quantum technologies utilize complex multidimensional processes that govern the dynamics of quantum systems. We develop an adaptive diagonal-element-probing compression technique that feasibly characterizes any unknown quantum processes using much fewer measurements compared to conventional methods. This technique utilizes compressive projective measurements that are generalizable to an arbitrary number of subsystems. Both numerical analysis and experimental results with unitary gates demonstrate low measurement costs, of order O(d(2)) for d-dimensional systems, and robustness against statistical noise. Our work potentially paves the way for a reliable and highly compressive characterization of general quantum devices. eng open access Universal compressive characterization of quantum dynamics journal article