1. Error-divisible two-qubit gates
- Author
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Perez, David Rodriguez, Varosy, Paul, Li, Ziqian, Roy, Tanay, Kapit, Eliot, and Schuster, David
- Subjects
Quantum Physics - Abstract
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 criteria, and example waveforms and protocols to satisfy them, using superconducting qubits with tunable couplers for constructing continuous gate sets with significantly reduced error for small-angle rotations. If implemented at scale, NISQ algorithm performance would be significantly improved by our error-divisible gate protocols., Comment: 5 pages main text, 11 pages total, 5 figures main text, 10 figures total, 3 tables in appendix
- Published
- 2021