Parasitic free gate: An Error-Protected Cross-Resonance Switch in Weakly Tunable Architectures

Xuexin Xu; Mohammad H Ansari

Parasitic free gate: An Error-Protected Cross-Resonance Switch in Weakly Tunable Architectures

POSTER

Abstract

We proposed an error-protected switch by combining a cross-resonance gate with a tunable coupler. The switch swaps the states of qubits between entangled and idle modes. In either mode, qubits can become free from stray couplings. We further utilize a weakly tunable qubit as an optimum coupler to bring the two modes parametrically near each other. This remarkably enhances the tuning process by reducing its leakage.

^* We gratefully acknowledge funding from the German Federal Ministry of Education and Research within the funding program "Quantum Technologies - From Basic Research to the Market" (Project GeQCoS), Contract No. 13N15685.

Publication: [1] X. Xu and M. H. Ansari, ZZ Freedom in Two-Qubit Gates. Physical Review Applied 15, 064074 (2021); arXiv:2009.00485
[2] J. Ku, X. Xu, M. Brink, D. C. McKay, J. B. Hertzberg, M. H. Ansari, B. L. T Plourde, Suppression of Unwanted ZZ Interactions in a Hybrid Two-Qubit system. Physical Review Letters 125, 200504 (2020); arXiv:2003.02775

Presenters

Xuexin Xu

Forschungszentrum Jülich GmbH

Authors

Xuexin Xu

Forschungszentrum Jülich GmbH
Mohammad H Ansari

Forschungszentrum Jülich GmbH