Entanglement in Resonance Fluorescence
Fuente:
arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| _version_ | 1866916479581028352 |
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| author | Carreño, Juan Camilo López Feijoo, Santiago Bermúdez Stobińska, Magdalena |
| author_facet | Carreño, Juan Camilo López Feijoo, Santiago Bermúdez Stobińska, Magdalena |
| contents | Particle entanglement is a fundamental resource upon which are based many quantum technologies. However, the up-to-now best sources of entangled photons rely on parametric down-conversion processes, which are optimal only at certain frequencies, which rarely match the energies of condensed-matter systems that can benefit from entanglement. In this Article, we show a way to circumvent this issue, and we introduce a new source of entangled photons based on resonance fluorescence delivering photon pairs as a superposition of vacuum and the Bell state $|Φ^-\rangle$. Our proposal relies on the emission from the satellite peaks of a two-level system driven by a strong off-resonant laser, whose intensity controls the frequencies of the entangled photons. Furthermore, the degree of entanglement can be optimized for every pair of frequencies, thus demonstrating a clear advantage over existing technologies. Finally, we illustrate the power of our novel source of entangled single-photon pairs by exciting a system of polaritons and showing that they are left in a maximally entangled steady state. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2302_04059 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Entanglement in Resonance Fluorescence Carreño, Juan Camilo López Feijoo, Santiago Bermúdez Stobińska, Magdalena Quantum Physics Quantum Gases Optics Particle entanglement is a fundamental resource upon which are based many quantum technologies. However, the up-to-now best sources of entangled photons rely on parametric down-conversion processes, which are optimal only at certain frequencies, which rarely match the energies of condensed-matter systems that can benefit from entanglement. In this Article, we show a way to circumvent this issue, and we introduce a new source of entangled photons based on resonance fluorescence delivering photon pairs as a superposition of vacuum and the Bell state $|Φ^-\rangle$. Our proposal relies on the emission from the satellite peaks of a two-level system driven by a strong off-resonant laser, whose intensity controls the frequencies of the entangled photons. Furthermore, the degree of entanglement can be optimized for every pair of frequencies, thus demonstrating a clear advantage over existing technologies. Finally, we illustrate the power of our novel source of entangled single-photon pairs by exciting a system of polaritons and showing that they are left in a maximally entangled steady state. |
| title | Entanglement in Resonance Fluorescence |
| topic | Quantum Physics Quantum Gases Optics |
| url | https://arxiv.org/abs/2302.04059 |