Strongly interacting photons in 2D waveguide QED
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arXiv
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| Hauptverfasser: | , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866910412871565312 |
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| author | Tečer, Matija Di Liberto, Marco Silvi, Pietro Montangero, Simone Romanato, Filippo Calajò, Giuseppe |
| author_facet | Tečer, Matija Di Liberto, Marco Silvi, Pietro Montangero, Simone Romanato, Filippo Calajò, Giuseppe |
| contents | One dimensional confinement in waveguide Quantum Electrodynamics (QED) plays a crucial role to enhance light-matter interactions and to induce a strong quantum nonlinear optical response. In two or higher dimensional settings, this response is reduced since photons can be emitted within a larger phase space, opening the question whether strong photon-photon interaction can be still achieved. In this study, we positively answer this question for the case of a 2D square array of atoms coupled to the light confined into a two-dimensional waveguide. More specifically, we demonstrate the occurrence of long-lived two-photon repulsive and bound states with genuine 2D features. Furthermore, we observe signatures of these effects also in free-space atomic arrays in the form of weakly-subradiant in-band scattering resonances. Our findings provide a paradigmatic signature of the presence of strong photon-photon interactions in 2D waveguide QED. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_07668 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Strongly interacting photons in 2D waveguide QED Tečer, Matija Di Liberto, Marco Silvi, Pietro Montangero, Simone Romanato, Filippo Calajò, Giuseppe Quantum Physics Optics One dimensional confinement in waveguide Quantum Electrodynamics (QED) plays a crucial role to enhance light-matter interactions and to induce a strong quantum nonlinear optical response. In two or higher dimensional settings, this response is reduced since photons can be emitted within a larger phase space, opening the question whether strong photon-photon interaction can be still achieved. In this study, we positively answer this question for the case of a 2D square array of atoms coupled to the light confined into a two-dimensional waveguide. More specifically, we demonstrate the occurrence of long-lived two-photon repulsive and bound states with genuine 2D features. Furthermore, we observe signatures of these effects also in free-space atomic arrays in the form of weakly-subradiant in-band scattering resonances. Our findings provide a paradigmatic signature of the presence of strong photon-photon interactions in 2D waveguide QED. |
| title | Strongly interacting photons in 2D waveguide QED |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2312.07668 |