RT Journal Article
T1 Universal compressive characterization of quantum dynamics
A1 Kim, Yosep
A1 Yong-Siah, Teo
A1 Daekun, Ahn
A1 Im, Dong Gil
A1 Cho, Young Wook
A1 Leuchs, Gerd
A1 Sánchez Soto, Luis Lorenzo
A1 Hynseok, Jeong
A1 Kim, Yoon-Ho
AB 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.
PB American Physical Society
SN 0031-9007
YR 2020
FD 2020-05-27
LK https://hdl.handle.net/20.500.14352/6324
UL https://hdl.handle.net/20.500.14352/6324
LA eng
NO © 2020 American Physical Society.National Research Foundation of Korea (NRF)National Research Foundation of Korea [2019R1A2C3004812, 2019M3E4A1080074, 2019R1H1A3079890, 2020R1A2C1008609, 2019R1A6A1A10073437]; KIST institutional programKorea Institute of Science & Technology (KIST) [2E30620]; Spanish MINECO [FIS201567963-P, PGC2018-099183-B-I00]; Global Ph.D. Fellowship by the NRF [2015H1A2A1033028].
NO Ministerio de Economía y Competitividad (MINECO)
DS Docta Complutense
RD 7 may 2024