2020/05/31 by Xian Wu, Spencer Tomarken, S. L. Tomarken +7
Computer Science · Mathematics · Physics and Astronomy · #Computer science #Electrical engineering #Fidelity #Hamiltonian (control theory) #High fidelity #Mathematical optimization #Mathematics #Physics #Programming language #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum computer #Quantum gate #Quantum logic #Quantum mechanics #Software #Swap (finance) #Topology (electrical circuits) #quant-ph
paper · pdf · doi:10.1103/physrevlett.125.170502
published as Phys. Rev. Lett. 125, 170502 (2020) · 12 pages, 3 figures, supplemental materials (4 supplemental figures)
arxiv created 2020/10/19 · openalex publication_date 2020/10/19 · arxiv updated 2020/10/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present an efficient approach to achieving arbitrary, high-fidelity control of a multilevel quantum system using optimal control techniques. As an demonstration, we implement a continuous, software-defined microwave pulse to realize a 0↔2 SWAP gate that achieves an average gate fidelity of 99.4%. We describe our procedure for extracting the system Hamiltonian, calibrating the quantum and classical hardware chain, and evaluating the gate fidelity. Our work represents an alternative, fully generalizable route towards achieving universal quantum control by leveraging optimal control techniques.