Realization of arbitrary doubly-controlled quantum phase gates
- URL: http://arxiv.org/abs/2108.01652v1
- Date: Tue, 3 Aug 2021 17:49:09 GMT
- Title: Realization of arbitrary doubly-controlled quantum phase gates
- Authors: Alexander D. Hill, Mark J. Hodson, Nicolas Didier, Matthew J. Reagor
- Abstract summary: We introduce a high-fidelity gate set inspired by a proposal for near-term quantum advantage in optimization problems.
By orchestrating coherent, multi-level control over three transmon qutrits, we synthesize a family of deterministic, continuous-angle quantum phase gates acting in the natural three-qubit computational basis.
- Score: 62.997667081978825
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Developing quantum computers for real-world applications requires
understanding theoretical sources of quantum advantage and applying those
insights to design more powerful machines. Toward that end, we introduce a
high-fidelity gate set inspired by a proposal for near-term quantum advantage
in optimization problems. By orchestrating coherent, multi-level control over
three transmon qutrits, we synthesize a family of deterministic,
continuous-angle quantum phase gates acting in the natural three-qubit
computational basis (CCPHASE$(\theta)$). We estimate the process fidelity for
this scheme via Cycle Benchmarking of $\mathcal{F}=87.1\pm0.8\%$, higher than
reference two-qubit gate decompositions. CCPHASE$(\theta)$ is anticipated to
have broad experimental implications, and we report a blueprint demonstration
for solving a class of binary constraint satisfaction problems whose
construction is consistent with a path to quantum advantage.
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