Qubit Syndrome Measurements with a High-Fidelity Rb-Cs Rydberg Gate

Physical Review Letters 2026

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Authors: Jared A. Miles, Martin Lichtman, A. M. Scott, Jillian J. Scott, Sam A. Norrell, M. J. Bedalov, D. A. Belknap, Daniel C. Cole, S. Y. Eubanks, M. Gillette, P. Gokhale, J. Goldwin
+11 more M. Iliev, R. A. Jones, Kevin W. Kuper, D. Mason, P. T. Mitchell, Joseph D. Murphree, Nathan A. Neff-Mallon, Thomas Noël, A. G. Radnaev, Ilya Vinogradov, Mark E. Saffman
DOI: 10.1103/pvjm-jxd2
Cited by: 1
References: 39

Abstract

We demonstrate an interspecies entangling Rydberg gate between rubidium (Rb) and cesium (Cs) atoms with fidelity F=0.975±0.002. The two-species atom array enables in-place quantum nondemolition (QND) qubit measurements which are a key capability for quantum error correction. We demonstrate this functionality with multiatom error syndrome measurements achieving QND measurement fidelities of F_{QND}=0.933(12) and 0.865(17) for two- and three-qubit plaquettes, respectively.

Fields of Study & Subjects

Quantum Information and Cryptography Quantum and electron transport phenomena Quantum optics and atomic interactions

Publication details

Journal / source
Physical Review Letters
Publisher
American Physical Society (APS)
Volume
137
Issue
10
Pages
100601–100601
Publication date
3 August 2026
Language
EN