Fast measurement of neutral atoms with a multi-atom gate

Quantum Physics [Submitted on 14 Apr 2026] Fast measurement of neutral atoms with a multi-atom gate Yotam Vaknin, Ran Finkelstein, Ofer Firstenberg, Alex Retzker Measurement time represents a critical bottleneck limiting the operational speed of neutral atom quantum computers, as it cannot be accelerated through parallelization like other quantum operations. We present a protocol for fast measurement of neutral atoms based on a new, fast multi-atom Rydberg gate that significantly reduces the measurement integration time and improves the measurement fidelity. Our approach employs a multi-qubit register of N ancilla atoms within a single Rydberg blockade region to measure a single data qubit. This enables an N-fold enhancement in photon emission collections, while reducing the measurement's sensitivity to loss. The scheme requires spectral separation between the data qubit and the ancillae, achievable through either a dual-species architecture or a targeted light shift. Beyond this, the scheme is straightforward to implement: it relies only on global pulses, global photon collection, and avoids both atom shuttling and numerically optimized pulses. Simulations of a Cs--Rb platform demonstrate that with only five ancillae (N=5), measurement infidelity below 10^{-3} within 6\ \mu\text{s} is achievable. Comments: 8 Pages, 5 Figures Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2604.13158 [quant-ph]   (or arXiv:2604.13158v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2604.13158 Focus to learn more Submission history From: Yotam Vaknin [view email] [v1] Tue, 14 Apr 2026 18:00:00 UTC (388 KB) Access Paper: HTML (experimental) view license Current browse context: quant-ph < prev   |   next > new | recent | 2026-04 References & Citations INSPIRE HEP NASA ADS Google Scholar Semantic Scholar Export BibTeX Citation Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer (What is the Explorer?) Connected Papers Toggle Connected Papers (What is Connected Papers?) Litmaps Toggle Litmaps (What is Litmaps?) scite.ai Toggle scite Smart Citations (What are Smart Citations?) Code, Data, Media Demos Related Papers About arXivLabs Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)