Fast measurement of neutral atoms with a multi-atom gate
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| Main Authors: | , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866918447004254208 |
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| author | Vaknin, Yotam Finkelstein, Ran Firstenberg, Ofer Retzker, Alex |
| author_facet | Vaknin, Yotam Finkelstein, Ran Firstenberg, Ofer Retzker, Alex |
| contents | 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 $6\ μ\text{s}$ is achievable. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_13158 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Fast measurement of neutral atoms with a multi-atom gate Vaknin, Yotam Finkelstein, Ran Firstenberg, Ofer Retzker, Alex Quantum Physics 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 $6\ μ\text{s}$ is achievable. |
| title | Fast measurement of neutral atoms with a multi-atom gate |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2604.13158 |