Cavity-Enhanced Collective Quantum Processing with Polarization-Encoded Qubits
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arXiv
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| Hauptverfasser: | , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866918494540398592 |
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| author | Wereszczyński, Kamil Cyran, Józef Brzezowski, Adam Załużny, Dawid Potoniec, Robert Wiśniowski, Kasper Michalczuk, Agnieszka |
| author_facet | Wereszczyński, Kamil Cyran, Józef Brzezowski, Adam Załużny, Dawid Potoniec, Robert Wiśniowski, Kasper Michalczuk, Agnieszka |
| contents | We introduce a cavity-enhanced optical architecture for collective quantum processing in which logical qubits are encoded in the polarization subspace of recirculating intracavity modes. The physical carrier and computational degree of freedom are explicitly separated: harmonic cavity bundles provide a stable resonant substrate, while programmable polarization transformations implement single-qubit operations. A polarization-selective nonlinear interaction in the entanglement region generates tunable controlled-phase gates, enabling a universal gate set. A parameter-scaling analysis shows that order-unity conditional phases are attainable in centimeter-scale cavities using experimentally accessible solid-state nonlinear media, without requiring extreme nonlinear coefficients, millisecond photon lifetimes, or sub-hertz laser stabilization. The results indicate that resonant recirculation provides a physically plausible platform for cavity based collective quantum architectures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_10473 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Cavity-Enhanced Collective Quantum Processing with Polarization-Encoded Qubits Wereszczyński, Kamil Cyran, Józef Brzezowski, Adam Załużny, Dawid Potoniec, Robert Wiśniowski, Kasper Michalczuk, Agnieszka Quantum Physics Artificial Intelligence We introduce a cavity-enhanced optical architecture for collective quantum processing in which logical qubits are encoded in the polarization subspace of recirculating intracavity modes. The physical carrier and computational degree of freedom are explicitly separated: harmonic cavity bundles provide a stable resonant substrate, while programmable polarization transformations implement single-qubit operations. A polarization-selective nonlinear interaction in the entanglement region generates tunable controlled-phase gates, enabling a universal gate set. A parameter-scaling analysis shows that order-unity conditional phases are attainable in centimeter-scale cavities using experimentally accessible solid-state nonlinear media, without requiring extreme nonlinear coefficients, millisecond photon lifetimes, or sub-hertz laser stabilization. The results indicate that resonant recirculation provides a physically plausible platform for cavity based collective quantum architectures. |
| title | Cavity-Enhanced Collective Quantum Processing with Polarization-Encoded Qubits |
| topic | Quantum Physics Artificial Intelligence |
| url | https://arxiv.org/abs/2605.10473 |