Wave-Shape-Tolerant Photonic Quantum Gates
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2021
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| _version_ | 1866914680354635776 |
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| author | Babushkin, Ihar Demircan, Ayhan Kues, Michael Morgner, Uwe |
| author_facet | Babushkin, Ihar Demircan, Ayhan Kues, Michael Morgner, Uwe |
| contents | Photons, acting as ``flying qubits'' in propagation geometries such as waveguides, appear unavoidably in the form of wavepackets (pulses). The actual shape of the photonic wavepacket, as well as possible temporal/spectral correlations between the photons, play a critical role in successful scalable computation. Currently, unentangled indistinguishable photons are considered as a suitable resource for scalable photonic circuits. Here we show that using so called coherent photon conversion, it is possible to construct flying-qubit gates, which are not only insensitive to waveshapes of the photons and temporal/spectral correlations between them, but which also fully preserve these waveshapes and correlations upon the processing. This allows using photons with correlations and purity in a very broad range for a scalable computation. Moreover, such gates can process entangled photonic wavepackets even more effectively than unentangled ones. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2105_13814 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Wave-Shape-Tolerant Photonic Quantum Gates Babushkin, Ihar Demircan, Ayhan Kues, Michael Morgner, Uwe Quantum Physics Optics Photons, acting as ``flying qubits'' in propagation geometries such as waveguides, appear unavoidably in the form of wavepackets (pulses). The actual shape of the photonic wavepacket, as well as possible temporal/spectral correlations between the photons, play a critical role in successful scalable computation. Currently, unentangled indistinguishable photons are considered as a suitable resource for scalable photonic circuits. Here we show that using so called coherent photon conversion, it is possible to construct flying-qubit gates, which are not only insensitive to waveshapes of the photons and temporal/spectral correlations between them, but which also fully preserve these waveshapes and correlations upon the processing. This allows using photons with correlations and purity in a very broad range for a scalable computation. Moreover, such gates can process entangled photonic wavepackets even more effectively than unentangled ones. |
| title | Wave-Shape-Tolerant Photonic Quantum Gates |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2105.13814 |