Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session F52: State Preparation and Initialization on Quantum Computers
8:00 AM–10:48 AM,
Tuesday, March 5, 2024
Room: 201AB
Sponsoring
Unit:
DQI
Chair: Sumeet Khatri, Freie Universität Berlin
Abstract: F52.00008 : Efficient Low-Depth UCC algorithm for Quantum Computing*
9:48 AM–10:00 AM
Presenter:
Jeremy Canfield
(Georgetown University)
Authors:
Jeremy Canfield
(Georgetown University)
James K Freericks
(Georgetown University)
Dominika Zgid
(University of Michigan)
The unitary coupled cluster (UCC) ansatz is one of the most promising ansatzes for quantum computation of electronic structure calculations. However, for large systems and for many orbitals, the number of UCC factors quickly leads to very deep quantum circuits. We address this by using Taylor expansions for UCC factors that have small angles, while we treat the large amplitude factors exactly. This greatly reduces the circuit depth at the cost of more measurements. This approach is further optimized by employing the hidden SU(2) group symmetry of the UCC factors of arbitrary rank. In this talk, we review progress made in the implementation of this algorithm, and look to future implementations.
*This work is funded by NSF CHEM-2154671. J. K. F. is also funded by the McDevitt bequest at Georgetown University
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