Kim Y, Siah Teo Y, Ahn D, Im DG, Cho YW, Leuchs G, Sanchez-Soto LL, Jeong H, Kim YH (2020)
Publication Type: Journal article
Publication year: 2020
Book Volume: 124
Article Number: 210401
Journal Issue: 21
DOI: 10.1103/PhysRevLett.124.210401
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(d2) 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.
APA:
Kim, Y., Siah Teo, Y., Ahn, D., Im, D.-G., Cho, Y.-W., Leuchs, G.,... Kim, Y.-H. (2020). Universal Compressive Characterization of Quantum Dynamics. Physical Review Letters, 124(21). https://doi.org/10.1103/PhysRevLett.124.210401
MLA:
Kim, Yosep, et al. "Universal Compressive Characterization of Quantum Dynamics." Physical Review Letters 124.21 (2020).
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