Journal
PHYSICAL REVIEW LETTERS
Volume 125, Issue 17, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.125.170502
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Funding
- U.S. Department of Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344]
- Department of Energy Office of Advanced Scientific Computing Research, Quantum Testbed Pathfinder Program [2017-LLNL-SCW1631]
- Laboratory Directed Research and Development program [LDRD20-ERD-028]
- National Nuclear Security Administration Advanced Simulation and Computing Beyond Moores Law program [LLNL-ABS-795437, LDRD19-DR-005, LLNL-JRNL-810657]
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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 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.
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