Entangled Photon-Pair Emission in Waveguide Circuit QED from a Cooper Pair Splitter
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| Main Authors: | , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866913865578577920 |
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| author | Governale, Michele Schönenberger, Christian Scarlino, Pasquale Rastelli, Gianluca |
| author_facet | Governale, Michele Schönenberger, Christian Scarlino, Pasquale Rastelli, Gianluca |
| contents | As a waveguide circuit QED architecture, we investigate theoretically the single-photon pair emission of a Cooper pair splitter composed of two double quantum dots, each coupled to a microwave transmission line. We find that this system can generate frequency-entangled photon pairs in the left and right transmission lines, specifically a superposition of two photon wave packets at different frequencies. The frequency entanglement of the two photons arises from the particle-hole coherent superposition (i.e., Andreev bound states) involving the delocalized entangled spin singlet. We also estimate a lower bound for the efficiency of entangled photon-pair generation, accounting for the presence of nonradiative processes such as phonon emissions. Our proposal is realistic and achievable with state-of-the-art techniques in quantum microwave engineering with electostatically defined semiconducting quantum dots. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_15109 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Entangled Photon-Pair Emission in Waveguide Circuit QED from a Cooper Pair Splitter Governale, Michele Schönenberger, Christian Scarlino, Pasquale Rastelli, Gianluca Mesoscale and Nanoscale Physics As a waveguide circuit QED architecture, we investigate theoretically the single-photon pair emission of a Cooper pair splitter composed of two double quantum dots, each coupled to a microwave transmission line. We find that this system can generate frequency-entangled photon pairs in the left and right transmission lines, specifically a superposition of two photon wave packets at different frequencies. The frequency entanglement of the two photons arises from the particle-hole coherent superposition (i.e., Andreev bound states) involving the delocalized entangled spin singlet. We also estimate a lower bound for the efficiency of entangled photon-pair generation, accounting for the presence of nonradiative processes such as phonon emissions. Our proposal is realistic and achievable with state-of-the-art techniques in quantum microwave engineering with electostatically defined semiconducting quantum dots. |
| title | Entangled Photon-Pair Emission in Waveguide Circuit QED from a Cooper Pair Splitter |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2407.15109 |