Journal
PRX QUANTUM
Volume 2, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PRXQuantum.2.040338
Keywords
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Funding
- U.S. Department of Energy's National Nuclear Security Administration [DE-NA0003525]
- U.S. Department of Energy, Office of Science, Office of Advanced Scientific Computing Research's Quantum Testbeds for Science, Quantum Testbed Pathfinder, and Early Career Research Programs
- Sandia National Laboratories' Laboratory Directed Research and Development Program
- Office of the Director of National Intelligence (ODNI), Intelligence Advanced Research Projects Activity (IARPA)
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Crosstalk is a major source of failure in multiqubit quantum information processors, which can be caused by various physical phenomena and introduce subtle correlations in device errors. Gate set tomography protocol can be used to identify and characterize crosstalk errors in quantum information processors.
Crosstalk is a leading source of failure in multiqubit quantum information processors. It can arise from a wide range of disparate physical phenomena, and can introduce subtle correlations in the errors experienced by a device. Several hardware characterization protocols are able to detect the presence of crosstalk, but few provide sufficient information to distinguish various crosstalk errors from one another. In this article we describe how gate set tomography, a protocol for detailed characterization of quantum operations, can be used to identify and characterize crosstalk errors in quantum information processors. We demonstrate our methods on a two-qubit trapped-ion processor and a two-qubit subsystem of a superconducting transmon processor.
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