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

2026/03/31 by J. Miles, M. T. Lichtman, A. M. Scott +20 · 1 citation
Physics and Astronomy · #quant-ph

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updated descriptions

arxiv created 2026/07/30 · arxiv updated 2026/08/03

Abstract

We demonstrate an inter-species entangling Rydberg gate between rubidium (Rb) and cesium (Cs) atoms with fidelity \mathcal F = 0.975± 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.

Citations

• Architectural mechanisms of a universal fault-tolerant quantum computer
• Continuous operation of a coherent 3,000-qubit system
• Interleaved dual-species arrays of single atoms using a passive optical element and one trapping laser
• Fault-Tolerant Operation and Materials Science with Neutral Atom Logical Qubits
• High-fidelity universal gates in the ¹⁷¹Yb ground state nuclear spin qubit
• Site-selective cavity readout and classical error correction of a 5-bit atomic register
• A universal neutral-atom quantum computer with individual optical addressing and non-destructive readout
• Spectroscopy and modeling of ¹⁷¹Yb Rydberg states for high-fidelity two-qubit gates
• A tweezer array with 6100 highly coherent atomic qubits
• A dual-species Rydberg array
• Mid-circuit operations using the omg-architecture in neutral atom arrays

Cited by

• Quantum Spin Liquid State of a Dual-Species Atomic Array on Kagome Lattice

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• Low-depth quantum error correction via three-qubit gates in Rydberg atom arrays