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| Format: | Preprint |
| Veröffentlicht: |
2021
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| Online-Zugang: | https://arxiv.org/abs/2112.10148 |
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| _version_ | 1866917697423409152 |
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| author | Ham, B. S. |
| author_facet | Ham, B. S. |
| contents | Franson-type nonlocal correlation is for the second-order intensity fringes measured between two remotely separated photons via coincidence detection, whereas their locally measured first-order intensities are uniform. This nonlocal intensity-product fringe shows a joint-phase relation of independent local parameters. Here, the Franson nonlocal correlation is investigated using a coherence approach based on the wave nature of quantum mechanics to understand the mysterious quantum feature of nonlocal fringes. For this, a typical Franson scheme based on entangled photon pairs is coherently analyzed for both local and nonlocal correlations, where the local intensities are due to many-wave interference between measured photos. For the nonlocal fringe, however, coincidence detection results in selective measurements, resulting in second-order amplitude superposition between locally measured photon basis products. Due to the intrinsic property of a fixed sum-phase relation between entangled photons in each pair, the joint-phase relation of the nonlocal fringe is immune to the random spectral detuning of photon pairs. As in the first-order amplitude superposition of a single photon self-interference, the second-order amplitude superposition between nonlocal basis-products is the origin of the nonlocal fringe. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2112_10148 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | The origin of Franson-type nonlocal correlation Ham, B. S. Quantum Physics Franson-type nonlocal correlation is for the second-order intensity fringes measured between two remotely separated photons via coincidence detection, whereas their locally measured first-order intensities are uniform. This nonlocal intensity-product fringe shows a joint-phase relation of independent local parameters. Here, the Franson nonlocal correlation is investigated using a coherence approach based on the wave nature of quantum mechanics to understand the mysterious quantum feature of nonlocal fringes. For this, a typical Franson scheme based on entangled photon pairs is coherently analyzed for both local and nonlocal correlations, where the local intensities are due to many-wave interference between measured photos. For the nonlocal fringe, however, coincidence detection results in selective measurements, resulting in second-order amplitude superposition between locally measured photon basis products. Due to the intrinsic property of a fixed sum-phase relation between entangled photons in each pair, the joint-phase relation of the nonlocal fringe is immune to the random spectral detuning of photon pairs. As in the first-order amplitude superposition of a single photon self-interference, the second-order amplitude superposition between nonlocal basis-products is the origin of the nonlocal fringe. |
| title | The origin of Franson-type nonlocal correlation |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2112.10148 |