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| Format: | Preprint |
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2025
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| Online-Zugang: | https://arxiv.org/abs/2510.22677 |
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| _version_ | 1866912671745441792 |
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| author | Yaish, Netanel P. Gokhale, Samata Peer, Avi |
| author_facet | Yaish, Netanel P. Gokhale, Samata Peer, Avi |
| contents | We demonstrate both the generation and detection of an ultra-high flux of polarization Bell states using broadband hyper-entangled bi-photons that are quantum-correlated in both polarization and time-energy. Bell states of polarization embody the most basic form of two-state entanglement, and are a key component of quantum protocols of communication and sensing. High-speed generation, processing and detection of polarization Bell-states is therefore critical for quantum technology. However, all current protocols that employ polarization entangled photons are inherently slow, primarily due to the photo-detectors (Photomultiplier tubes, avalanche photo-diodes, etc.) that can handle only $10^{6-7}$ photons/s, whereas sources may easily produce $10^{10-13}$ photons/s or more (if properly designed). We fully alleviate this detection bottleneck by resorting to physical detection of the bi-photons with nonlinear interferometry. We harness a generalized, dual polarization SU1,1 interferometer to generate, manipulate \textit{and measure} all the triplet Bell-states at a flux of $\sim\!5\times10^{11}$ photons/s, enhancing the speed of quantum processing by >5 orders of magnitude compared to standard methods. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_22677 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Generation and Detection of Hyperentangled Bell States at an Ultra-High Flux Yaish, Netanel P. Gokhale, Samata Peer, Avi Quantum Physics Optics We demonstrate both the generation and detection of an ultra-high flux of polarization Bell states using broadband hyper-entangled bi-photons that are quantum-correlated in both polarization and time-energy. Bell states of polarization embody the most basic form of two-state entanglement, and are a key component of quantum protocols of communication and sensing. High-speed generation, processing and detection of polarization Bell-states is therefore critical for quantum technology. However, all current protocols that employ polarization entangled photons are inherently slow, primarily due to the photo-detectors (Photomultiplier tubes, avalanche photo-diodes, etc.) that can handle only $10^{6-7}$ photons/s, whereas sources may easily produce $10^{10-13}$ photons/s or more (if properly designed). We fully alleviate this detection bottleneck by resorting to physical detection of the bi-photons with nonlinear interferometry. We harness a generalized, dual polarization SU1,1 interferometer to generate, manipulate \textit{and measure} all the triplet Bell-states at a flux of $\sim\!5\times10^{11}$ photons/s, enhancing the speed of quantum processing by >5 orders of magnitude compared to standard methods. |
| title | Generation and Detection of Hyperentangled Bell States at an Ultra-High Flux |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2510.22677 |