Journal
2021 IEEE INTERNATIONAL CONFERENCE ON QUANTUM COMPUTING AND ENGINEERING (QCE 2021) / QUANTUM WEEK 2021
Volume -, Issue -, Pages 413-418Publisher
IEEE COMPUTER SOC
DOI: 10.1109/QCE52317.2021.00062
Keywords
quantum control; pulse control; gate design; transmon device
Categories
Funding
- U.S. Department of Energy, Office of Science, National Quantum Information Science Research Centers, Quantum Science Center
- U.S. Department of Energy, Office of Science, Early Career Research Project
- Office of Science of the U.S. Department of Energy [DE-AC05-00OR22725]
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The proposed framework allows for the design of novel gate designs and enhances efficiency and fidelity of quantum logic gates.
Optimal control theory provides a framework for numerical discovery of device controls that implement quantum logic gates, but common objective functions used for optimization often assign arbitrarily high costs to otherwise useful controls. We propose a framework for designing objective functions that permit novel gate designs such as echo pulses or locally-equivalent gates. We use numerical simulations to demonstrate the efficacy of the new objective functions by designing microwave-only pulses that act as entangling gates for superconducting transmon architectures. We observe that the proposed objective functions lead to higher fidelity controls in fewer optimization iterations than obtainable by traditional objective functions.
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