Error-Divisible Two-Qubit Gates

doi:10.1103/PhysRevApplied.19.024043

2023-02-15

David Rodríguez Pérez *

DOI：10.1103/PhysRevApplied.19.024043

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摘要

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We introduce a simple widely applicable formalism for designing error-divisible two-qubit gates: a quantum gate set where fractional rotations have proportionally reduced error compared to the full entangling gate. In current noisy intermediate-scale quantum (NISQ) algorithms, performance is largely constrained by error proliferation at high circuit depths, of which two-qubit gate error is generally the dominant contribution. Further, in many hardware implementations, arbitrary two-qubit rotations must be composed from multiple two-qubit stock gates, further increasing error. This work introduces a set of cri-teria, and example wave forms and protocols to satisfy them, using superconducting qubits with tunable couplers for constructing continuous gate sets with significantly reduced leakage and dynamic ZZ errors for small-angle rotations. If implemented at scale, NISQ-algorithm performance could be significantly improved by our error-divisible gate protocols.

期刊

Physical Review Applied

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4.4

论文数:

7.1K

被引数:

2.8W

机构

Colorado School of Mines

学者数:

5.6K

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被引数: 1.0W

university of chicago

学者数:

4.5W

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被引数: 80

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