[23p-A302-1~13] FS.1 Focused Session "AI Electronics"

2:15 PM - 2:30 PM JST(5:15 AM - 5:30 AM UTC)English Presentation

[23p-A302-5] Constructing Hardware Efficient Ansatz Using Sequential-ADAPT-VQE

〇Shanchuan Li¹, Daisuke Tsukayama¹, Juncheng Wang¹, Jun-ichi Shirakashi¹, Hiroshi Imai² (1.Tokyo Univ. Agr. & Tech., 2.Univ. Tokyo)

Keywords:

Gate-Based Quantum Computer,Quantum-Classical Hybrid Algorithm,Variantional Quantum Eigensolver

The variational quantum eigensolver (VQE), is primarily used for quantum chemistry calculations. Quantum circuits used in VQE, such as the UCCSD ansatz and hardware-efficient ansatz, have been proposed but are limited to obtaining approximate solutions. Recently, algorithms such as ADAPT-VQE and Qubit-ADAPT-VQE have been introduced, adapting circuits based on algorithms and achieving high-precision quantum chemistry calculations. However, these algorithms raise concerns about computational accuracy when utilizing NISQ due to the utilization of CNOT gates in the order of hundreds to thousands. Therefore, in this study, we propose Sequential-ADAPT-VQE, which constructs the ansatz at the level of single-qubit gates based on the hardware-efficient ansatz, and investigate its computational accuracy.