Crossing exceptional points in non-Hermitian quantum systems
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2024
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866916557617102848 |
|---|---|
| author | Klauck, Friederike U. J. Heinrich, Matthias Szameit, Alexander Wolterink, Tom A. W. |
| author_facet | Klauck, Friederike U. J. Heinrich, Matthias Szameit, Alexander Wolterink, Tom A. W. |
| contents | Exceptional points facilitate peculiar dynamics in non-Hermitian systems. Yet, in photonics, they have mainly been studied in the classical realm. In this work, we reveal the behavior of two-photon quantum states in non-Hermitian systems across the exceptional point. We probe the lossy directional coupler with an indistinguishable two-photon input state and observe distinct changes of the quantum correlations at the output as the system undergoes spontaneous breaking of parity-time symmetry. Moreover, we demonstrate a switching in the quantum interference of photons directly at the exceptional point, where Hong-Ou-Mandel dips are transformed into peaks by a change of basis. These results show that quantum interference and exceptional points are linked in curious ways that can now be further explored. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_12578 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Crossing exceptional points in non-Hermitian quantum systems Klauck, Friederike U. J. Heinrich, Matthias Szameit, Alexander Wolterink, Tom A. W. Quantum Physics Optics Exceptional points facilitate peculiar dynamics in non-Hermitian systems. Yet, in photonics, they have mainly been studied in the classical realm. In this work, we reveal the behavior of two-photon quantum states in non-Hermitian systems across the exceptional point. We probe the lossy directional coupler with an indistinguishable two-photon input state and observe distinct changes of the quantum correlations at the output as the system undergoes spontaneous breaking of parity-time symmetry. Moreover, we demonstrate a switching in the quantum interference of photons directly at the exceptional point, where Hong-Ou-Mandel dips are transformed into peaks by a change of basis. These results show that quantum interference and exceptional points are linked in curious ways that can now be further explored. |
| title | Crossing exceptional points in non-Hermitian quantum systems |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2407.12578 |