Deterministic feedforward-based generation of large optical coherent-state superposition
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arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866915883585110016 |
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| author | Notarnicola, Michele N. Jarzyna, Marcin Filip, Radim |
| author_facet | Notarnicola, Michele N. Jarzyna, Marcin Filip, Radim |
| contents | Large optical coherent-state superpositions are essential to advance quantum sensing, quantum repeaters and error-correction codes. We propose a deterministic feedforward protocol employing qubit-mode dispersive coupling, currently available in cavity quantum electrodynamics (QED). We show this single-mode protocol to outperform the advanced three-mode Gaussian-photon-number-resolving detector scheme both in terms of average fidelity and quantum non-Gaussian phase-space properties, and propose sensitivity to weak displacements of interference fringes as a feasible and conclusive witness of quantum interference. This approach combining QED with electro-optical feedforward is extendable to tailored states for applications and other platforms. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_22068 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Deterministic feedforward-based generation of large optical coherent-state superposition Notarnicola, Michele N. Jarzyna, Marcin Filip, Radim Quantum Physics Large optical coherent-state superpositions are essential to advance quantum sensing, quantum repeaters and error-correction codes. We propose a deterministic feedforward protocol employing qubit-mode dispersive coupling, currently available in cavity quantum electrodynamics (QED). We show this single-mode protocol to outperform the advanced three-mode Gaussian-photon-number-resolving detector scheme both in terms of average fidelity and quantum non-Gaussian phase-space properties, and propose sensitivity to weak displacements of interference fringes as a feasible and conclusive witness of quantum interference. This approach combining QED with electro-optical feedforward is extendable to tailored states for applications and other platforms. |
| title | Deterministic feedforward-based generation of large optical coherent-state superposition |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2603.22068 |