Fast Quantum Gates for Neutral Atoms Separated by a Few Tens of Micrometers
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866913028324196352 |
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| author | Bergonzoni, Matteo Riso, Rosario Roberto Pupillo, Guido |
| author_facet | Bergonzoni, Matteo Riso, Rosario Roberto Pupillo, Guido |
| contents | We present a theoretical scheme for a family of fast and high-fidelity two-qubit iSWAP gates between neutral atoms separated by more than 20 um, enabled by resonant dipole-dipole spin-exchange interactions between Rydberg states. The protocol harnesses coherent excitation-exchange-deexcitation dynamics between the qubit and the Rydberg states within a single and smooth laser pulse, in the presence of strong dipole-dipole interactions. We utilize optimal control methods to achieve theoretical gate fidelities and durations comparable to blockade-based gates in the presence of relevant noise, while extending the effective interaction range by an order of magnitude. This enables entanglement well beyond the blockade radius, offering a route toward fast, high-connectivity quantum processors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_20437 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Fast Quantum Gates for Neutral Atoms Separated by a Few Tens of Micrometers Bergonzoni, Matteo Riso, Rosario Roberto Pupillo, Guido Quantum Physics We present a theoretical scheme for a family of fast and high-fidelity two-qubit iSWAP gates between neutral atoms separated by more than 20 um, enabled by resonant dipole-dipole spin-exchange interactions between Rydberg states. The protocol harnesses coherent excitation-exchange-deexcitation dynamics between the qubit and the Rydberg states within a single and smooth laser pulse, in the presence of strong dipole-dipole interactions. We utilize optimal control methods to achieve theoretical gate fidelities and durations comparable to blockade-based gates in the presence of relevant noise, while extending the effective interaction range by an order of magnitude. This enables entanglement well beyond the blockade radius, offering a route toward fast, high-connectivity quantum processors. |
| title | Fast Quantum Gates for Neutral Atoms Separated by a Few Tens of Micrometers |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2511.20437 |