Quantum walks of correlated photons in non-Hermitian photonic lattices
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arXiv
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| Autori principali: | , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866910605247512576 |
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| author | Gao, Mingyuan Sheng, Chong Zhao, Yule He, Runqiu Lu, Liangliang Chen, Wei Ding, Kun Zhu, Shining Liu, Hui |
| author_facet | Gao, Mingyuan Sheng, Chong Zhao, Yule He, Runqiu Lu, Liangliang Chen, Wei Ding, Kun Zhu, Shining Liu, Hui |
| contents | Entanglement entropy characterizes the correlation of multi-particles and unveils the crucial features of open quantum systems. However, the experimental realization of exploring entanglement in non-Hermitian systems remains a challenge. In parallel, quantum walks have offered the possibility of studying the underlying mechanisms of non-Hermitian physics, which includes exceptional points, the non-Hermitian skin effect, and non-Bloch phase transitions. Unfortunately, these studies have only involved and prevailingly focused on the behavior of a single particle. Here, we propose and experimentally realize quantum walks of two indistinguishable photons in engineered non-Hermitian photonic lattices. We have successfully observed the unidirectional behavior of quantum walks in the bulk far from the edges induced by the skin effect. Moreover, we experimentally reveal the suppression of entanglement that is caused by the skin effect in non-Hermitian systems. Our study may facilitate a deep understanding of entanglement in open quantum many-body systems that are far from thermal equilibrium. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_10130 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Quantum walks of correlated photons in non-Hermitian photonic lattices Gao, Mingyuan Sheng, Chong Zhao, Yule He, Runqiu Lu, Liangliang Chen, Wei Ding, Kun Zhu, Shining Liu, Hui Quantum Physics Optics Entanglement entropy characterizes the correlation of multi-particles and unveils the crucial features of open quantum systems. However, the experimental realization of exploring entanglement in non-Hermitian systems remains a challenge. In parallel, quantum walks have offered the possibility of studying the underlying mechanisms of non-Hermitian physics, which includes exceptional points, the non-Hermitian skin effect, and non-Bloch phase transitions. Unfortunately, these studies have only involved and prevailingly focused on the behavior of a single particle. Here, we propose and experimentally realize quantum walks of two indistinguishable photons in engineered non-Hermitian photonic lattices. We have successfully observed the unidirectional behavior of quantum walks in the bulk far from the edges induced by the skin effect. Moreover, we experimentally reveal the suppression of entanglement that is caused by the skin effect in non-Hermitian systems. Our study may facilitate a deep understanding of entanglement in open quantum many-body systems that are far from thermal equilibrium. |
| title | Quantum walks of correlated photons in non-Hermitian photonic lattices |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2409.10130 |