Robust Two-Qubit Geometric Phase Gates using Amplitude and Frequency Ramping

Abstract:We demonstrate a method for generating entanglement between trapped atomic ions based on adiabatically ramped state-dependent forces. By ramping both the amplitude of the state-dependent force and the motional mode frequencies, we realize an entangling operation that is robust to motional mode occupation and drifts in the mode frequencies. We measure Bell state fidelities above 0.99 across a broad range of ramp parameters and with motional occupations up to 10 phonons. This technique enables high-fidelity entangling operations without ground-state cooling, has a reduced calibration overhead, and is well suited for both quantum logic spectroscopy applications and scalable quantum computing architectures.

Published version. 9 pages, 4 figures, plus 10 pages of Supplemental Material

Quantum Physics (quant-ph); Atomic Physics (physics.atom-ph)

arXiv:2511.14364 [quant-ph]

(or arXiv:2511.14364v3 [quant-ph] for this version)

https://doi.org/10.48550/arXiv.2511.14364 Focus to learn more arXiv-issued DOI via DataCite

Phys. Rev. Lett. 137, 080602 (2026)

https://doi.org/10.1103/x9b9-5d78 Focus to learn more DOI(s) linking to related resources

arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website.

Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them.

Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs.