Qubit syndrome measurements with a high fidelity Rb-Cs Rydberg gate

J. Miles; M. T. Lichtman; A. M. Scott; J. Scott; S. A. Norrell; M. J. Bedalov; D. A. Belknap; D. C. Cole; S. Y. Eubanks; M. Gillette; P. Gokhale; J. Goldwin; M. Iliev; R. A. Jones; K. W. Kuper; D. Mason; P. T. Mitchell; J. D. Murphree; N. A. Neff-Mallon; T. W. Noel; A. G. Radnaev; I. V. Vinogradov; M. Saffman

doi:10.48550/arXiv.2603.13492

Qubit syndrome measurements with a high fidelity Rb-Cs Rydberg gate

J. Miles, M. T. Lichtman, A. M. Scott, J. Scott, S. A. Norrell, M. J. Bedalov, D. A. Belknap, D. C. Cole, S. Y. Eubanks, M. Gillette, P. Gokhale, J. Goldwin, M. Iliev, R. A. Jones, K. W. Kuper, D. Mason, P. T. Mitchell, J. D. Murphree, N. A. Neff-Mallon, T. W. NoelA. G. Radnaev, I. V. Vinogradov, M. Saffman

School of Physics

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Abstract

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

Original language	English
DOIs	https://doi.org/10.48550/arXiv.2603.13492
Publication status	Published - 13 Mar 2026

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quant-ph

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Miles, J., Lichtman, M. T., Scott, A. M., Scott, J., Norrell, S. A., Bedalov, M. J., Belknap, D. A., Cole, D. C., Eubanks, S. Y., Gillette, M., Gokhale, P., Goldwin, J., Iliev, M., Jones, R. A., Kuper, K. W., Mason, D., Mitchell, P. T., Murphree, J. D., Neff-Mallon, N. A., ... Saffman, M. (2026). Qubit syndrome measurements with a high fidelity Rb-Cs Rydberg gate. https://doi.org/10.48550/arXiv.2603.13492

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title = "Qubit syndrome measurements with a high fidelity Rb-Cs Rydberg gate",

abstract = "We demonstrate an inter-species entangling Rydberg gate between rubidium (Rb) and cesium (Cs) atoms with fidelity \$\textbackslash{}mathcal F = 0.975\textbackslash{}pm 0.002\$. The two-species atom array enables in-place quantum non-demolition (QND) qubit measurements which are a key capability for quantum error correction. We demonstrate this functionality with multi-atom error syndrome measurements achieving QND measurement fidelities of \$\{\textbackslash{}mathcal F\}\_\{\textbackslash{}rm QND\} = 0.933(12)\$ and 0.865(17) for two- and three-qubit plaquettes, respectively.",

keywords = "quant-ph",

author = "J. Miles and Lichtman, \{M. T.\} and Scott, \{A. M.\} and J. Scott and Norrell, \{S. A.\} and Bedalov, \{M. J.\} and Belknap, \{D. A.\} and Cole, \{D. C.\} and Eubanks, \{S. Y.\} and M. Gillette and P. Gokhale and J. Goldwin and M. Iliev and Jones, \{R. A.\} and Kuper, \{K. W.\} and D. Mason and Mitchell, \{P. T.\} and Murphree, \{J. D.\} and Neff-Mallon, \{N. A.\} and Noel, \{T. W.\} and Radnaev, \{A. G.\} and Vinogradov, \{I. V.\} and M. Saffman",

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Miles, J, Lichtman, MT, Scott, AM, Scott, J, Norrell, SA, Bedalov, MJ, Belknap, DA, Cole, DC, Eubanks, SY, Gillette, M, Gokhale, P, Goldwin, J, Iliev, M, Jones, RA, Kuper, KW, Mason, D, Mitchell, PT, Murphree, JD, Neff-Mallon, NA, Noel, TW, Radnaev, AG, Vinogradov, IV & Saffman, M 2026 'Qubit syndrome measurements with a high fidelity Rb-Cs Rydberg gate'. https://doi.org/10.48550/arXiv.2603.13492

TY - UNPB

T1 - Qubit syndrome measurements with a high fidelity Rb-Cs Rydberg gate

AU - Miles, J.

AU - Lichtman, M. T.

AU - Scott, A. M.

AU - Scott, J.

AU - Norrell, S. A.

AU - Bedalov, M. J.

AU - Belknap, D. A.

AU - Cole, D. C.

AU - Eubanks, S. Y.

AU - Gillette, M.

AU - Gokhale, P.

AU - Goldwin, J.

AU - Iliev, M.

AU - Jones, R. A.

AU - Kuper, K. W.

AU - Mason, D.

AU - Mitchell, P. T.

AU - Murphree, J. D.

AU - Neff-Mallon, N. A.

AU - Noel, T. W.

AU - Radnaev, A. G.

AU - Vinogradov, I. V.

AU - Saffman, M.

N1 - corrected references

PY - 2026/3/13

Y1 - 2026/3/13

N2 - We demonstrate an inter-species entangling Rydberg gate between rubidium (Rb) and cesium (Cs) atoms with fidelity $\mathcal F = 0.975\pm 0.002$. The two-species atom array enables in-place quantum non-demolition (QND) qubit measurements which are a key capability for quantum error correction. We demonstrate this functionality with multi-atom error syndrome measurements achieving QND measurement fidelities of ${\mathcal F}_{\rm QND} = 0.933(12)$ and 0.865(17) for two- and three-qubit plaquettes, respectively.

AB - We demonstrate an inter-species entangling Rydberg gate between rubidium (Rb) and cesium (Cs) atoms with fidelity $\mathcal F = 0.975\pm 0.002$. The two-species atom array enables in-place quantum non-demolition (QND) qubit measurements which are a key capability for quantum error correction. We demonstrate this functionality with multi-atom error syndrome measurements achieving QND measurement fidelities of ${\mathcal F}_{\rm QND} = 0.933(12)$ and 0.865(17) for two- and three-qubit plaquettes, respectively.

KW - quant-ph

U2 - 10.48550/arXiv.2603.13492

DO - 10.48550/arXiv.2603.13492

M3 - Preprint

BT - Qubit syndrome measurements with a high fidelity Rb-Cs Rydberg gate

ER -

Qubit syndrome measurements with a high fidelity Rb-Cs Rydberg gate

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