期刊
PHYSICAL REVIEW RESEARCH
卷 4, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevResearch.4.023079
关键词
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资金
- Quantum Testbed Program of the Advanced Scientific Computing Research program for Basic Energy Sciences
- Office of Science of the U.S. Department of Energy [DE-AC02-05CH11231, DE-AC02-06CH11357]
- U.S. Department of Energy, Office of Science, Office of Advanced Scientific Computing Research, Accelerated Research for Quantum Computing program
This paper proposes a mixed-integer-programming-based optimization approach to determine qubit frequencies for maximizing the fabrication yield of quantum processors. By studying traditional qubit and qutrit architectures, as well as cross-resonance interaction processors, and comparing them to a differential ac-Stark shift based on entanglement gates, the approach greatly improves the fabrication yield and scalability of these devices.
Fixed-frequency superconducting quantum processors are one of the most mature quantum computing architectures with high-coherence qubits and simple controls. However, high-fidelity multiqubit gates pose tight requirements on individual qubit frequencies in these processors, and these constraints are difficult to satisfy when constructing larger processors due to the large dispersion in the fabrication of Josephson junctions. In this paper, we propose a mixed-integer-programming-based optimization approach that determines qubit frequencies to maximize the fabrication yield of quantum processors. We study traditional qubit and qutrit (three-level) architectures with cross-resonance interaction processors. We compare these architectures to a differential ac-Stark shift based on entanglement gates and show that our approach greatly improves the fabrication yield and also increases the scalability of these devices. Our approach is general and can be adapted to problems where one must avoid specific frequency collisions.
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