Generation of frequency entanglement with an effective quantum dot-waveguide two-photon quadratic interaction
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866914204884140032 |
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| author | Meguebel, Mohamed Federico, Maxime Felicetti, Simone Belabas, Nadia Fabre, Nicolas |
| author_facet | Meguebel, Mohamed Federico, Maxime Felicetti, Simone Belabas, Nadia Fabre, Nicolas |
| contents | Light-matter interactions with quantum dots have been extensively studied to harness key quantum properties of photons, such as indistinguishability and entanglement. In this theoretical work, we exploit the atomic-like four-level structure of a quantum dot coupled to a waveguide to model a shaping frequency entangling gate (FrEnGATE) for single photons. Our approach is based on the identification of input frequencies and an atomic level structure for which frequency-dependent one-photon transitions are adiabatically eliminated, while frequency-dependent two-photon transitions are resonantly enhanced. The frequency entanglement performance of the gate is analyzed using a Schmidt decomposition for continuous variables, revealing a trade-off between entanglement generation efficiency and entanglement quality. We further demonstrate the use of the FrEnGATE for the generation of entangled frequency qudit states. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_10121 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Generation of frequency entanglement with an effective quantum dot-waveguide two-photon quadratic interaction Meguebel, Mohamed Federico, Maxime Felicetti, Simone Belabas, Nadia Fabre, Nicolas Quantum Physics Light-matter interactions with quantum dots have been extensively studied to harness key quantum properties of photons, such as indistinguishability and entanglement. In this theoretical work, we exploit the atomic-like four-level structure of a quantum dot coupled to a waveguide to model a shaping frequency entangling gate (FrEnGATE) for single photons. Our approach is based on the identification of input frequencies and an atomic level structure for which frequency-dependent one-photon transitions are adiabatically eliminated, while frequency-dependent two-photon transitions are resonantly enhanced. The frequency entanglement performance of the gate is analyzed using a Schmidt decomposition for continuous variables, revealing a trade-off between entanglement generation efficiency and entanglement quality. We further demonstrate the use of the FrEnGATE for the generation of entangled frequency qudit states. |
| title | Generation of frequency entanglement with an effective quantum dot-waveguide two-photon quadratic interaction |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2505.10121 |