Quantum nonlocal modulation cancellation with distributed clocks
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866916915287425024 |
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| author | Chapman, Stephen D. Seshadri, Suparna Lukens, Joseph M. Peters, Nicholas A. McKinney, Jason D. Weiner, Andrew M. Lu, Hsuan-Hao |
| author_facet | Chapman, Stephen D. Seshadri, Suparna Lukens, Joseph M. Peters, Nicholas A. McKinney, Jason D. Weiner, Andrew M. Lu, Hsuan-Hao |
| contents | We demonstrate nonlocal modulation of entangled photons with truly distributed RF clocks. Leveraging a custom radio-over-fiber (RFoF) system characterized via classical spectral interference, we validate its effectiveness for quantum networking by multiplexing the RFoF clock with one photon from a frequency-bin-entangled pair and distributing the coexisting quantum-classical signals over fiber. Phase modulation of the two photons reveals nonlocal correlations in excellent agreement with theory: in-phase modulation produces additional sidebands in the joint spectral intensity, while out-of-phase modulation is nonlocally canceled. Our simple, feedback-free design attains sub-picosecond synchronization -- namely, drift less than $\sim$0.5 ps in a 5.5 km fiber over 30 min (fractionally only $\sim$2$\times$10$^{-8}$ of the total fiber delay) -- and should facilitate frequency-encoded quantum networking protocols such as high-dimensional quantum key distribution and entanglement swapping, unlocking frequency-bin qubits for practical quantum communications in deployed metropolitan-scale networks. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_17330 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Quantum nonlocal modulation cancellation with distributed clocks Chapman, Stephen D. Seshadri, Suparna Lukens, Joseph M. Peters, Nicholas A. McKinney, Jason D. Weiner, Andrew M. Lu, Hsuan-Hao Quantum Physics Optics We demonstrate nonlocal modulation of entangled photons with truly distributed RF clocks. Leveraging a custom radio-over-fiber (RFoF) system characterized via classical spectral interference, we validate its effectiveness for quantum networking by multiplexing the RFoF clock with one photon from a frequency-bin-entangled pair and distributing the coexisting quantum-classical signals over fiber. Phase modulation of the two photons reveals nonlocal correlations in excellent agreement with theory: in-phase modulation produces additional sidebands in the joint spectral intensity, while out-of-phase modulation is nonlocally canceled. Our simple, feedback-free design attains sub-picosecond synchronization -- namely, drift less than $\sim$0.5 ps in a 5.5 km fiber over 30 min (fractionally only $\sim$2$\times$10$^{-8}$ of the total fiber delay) -- and should facilitate frequency-encoded quantum networking protocols such as high-dimensional quantum key distribution and entanglement swapping, unlocking frequency-bin qubits for practical quantum communications in deployed metropolitan-scale networks. |
| title | Quantum nonlocal modulation cancellation with distributed clocks |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2407.17330 |