Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session W64: Noisy Hardware Applications III
3:00 PM–5:36 PM,
Thursday, March 9, 2023
Room: Room 415
Sponsoring
Unit:
DQI
Chair: Erik J. Gustafson, Fermilab
Abstract: W64.00004 : Dealing with noise in digital quantum simulations and variational circuits on a trapped-ion machine*
3:36 PM–3:48 PM
Presenter:
Norbert M Linke
(Duke University)
Author:
Norbert M Linke
(Duke University)
Noisy operations influence all quantum computing applications and in the absence of fault-tolerant encoding, different mitigation strategies are being investigated. We recently simulated the real-time dynamics of a lattice gauge theory in 1+1 dimensions, i.e., the lattice Schwinger model, and report the comparison of different error mitigation strategies for this application [2].
Quantum classical-hybrid optimization on variational circuits is seen as a promising near-term strategy applying quantum resources to combinatorial optimization problems [3]. The noisy evolution and readout of the quantum processor, as well as cost-function landscapes devoid of guiding features like gradients, pose challenges for classical optimizers. We present an efficient "fast-and-slow" optimization strategy that switches between global Bayesian and fast local optimization to avoid local minima in large parameter spaces.
[1] D. Zhu et al., Science Advances 5, 10 (2019)
[2] N. H. Nguyen et al., PRX Quantum 3, 020324 (2022)
[3] Y. Zhu et al., Quantum Sci. Technol. 8 015007 (2023)
*We acknowledge support by the Office of Naval Research (N00014-20-1-2695), the DOE Office of Science, Office of Nuclear Physics (DE-SC0021143), the National Science Foundation Quantum Leap Challenge Institute on Robust Quantum Simulation (OMA-2120757) and the Maryland Army Research Laboratory Quantum Partnership (W911NF1920181).
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