Dynamics of entanglement in non-Hermitian system of nonreciprocal coupling
Abstract
The exploration of the effect of non-Hermitian (NH) in quantum systems is gaining renewed momentum as a result of the recent progress in experiments. It has been indicated that the ability to engineer the orders of exceptional points (EPs) can be fundamental to its applications in quantum control, such as accelerating entanglement generation; however, an initial survey of the interactions between different orders of EPs is still missing. In this work, we try to partially address this issue by employing a non-reciprocally coupled cavity system which can be experimentally realizable with a two-dimensional reconfigurable NH gauged laser array. With deliberate design, our systems display both second and third orders of EPs. The sign of a novel, purely quantum continuous entanglement phase transition is observed, which reveals how multi-EP interactions alter entanglement dynamics across different regimes while maintaining accelerated generation. Our findings reveil the genuinely quantum NH physics of higher-order EPs, which has opened up a new avenue for future investigations of the higher-order degeneracy application and the dynamic phase transitions of quantum systems.
Related
- Nonreciprocal Coupling Induced Non-Hermitian Entanglement in Optomechanical Systems
- Nonreciprocal coupling enables tunable exceptional-point response in non-Hermitian circuits
- Nonreciprocal Floquet tunneling dynamics of spin-orbit-coupled bosonic atoms in a non-Hermitian double-well potential
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- Tunable non-Hermitian skin effect and topological phases in ladders with staggered nonreciprocal interleg hopping
BibTeX
@misc{wu2026dynamics,
title = {{Dynamics of entanglement in non-Hermitian system of nonreciprocal coupling}},
author = {Jiguo Wu and Shaojie Yang and Xiong Liu and Zhibo Jiang and Zhiyou Zhang and Rongchun Ge},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.08388},
eprint = {2609.08388},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.08388},
}
RIS
TY - UNPB
TI - Dynamics of entanglement in non-Hermitian system of nonreciprocal coupling
AU - Jiguo Wu
AU - Shaojie Yang
AU - Xiong Liu
AU - Zhibo Jiang
AU - Zhiyou Zhang
AU - Rongchun Ge
PY - 2026
DA - 2026/09/08
PB - arXiv
DO - 10.48550/arxiv.2609.08388
UR - https://arxiv.org/abs/2609.08388
AB - The exploration of the effect of non-Hermitian (NH) in quantum systems is gaining renewed momentum as a result of the recent progress in experiments. It has been indicated that the ability to engineer the orders of exceptional points (EPs) can be fundamental to its applications in quantum control, such as accelerating entanglement generation; however, an initial survey of the interactions between different orders of EPs is still missing. In this work, we try to partially address this issue by employing a non-reciprocally coupled cavity system which can be experimentally realizable with a two-dimensional reconfigurable NH gauged laser array. With deliberate design, our systems display both second and third orders of EPs. The sign of a novel, purely quantum continuous entanglement phase transition is observed, which reveals how multi-EP interactions alter entanglement dynamics across different regimes while maintaining accelerated generation. Our findings reveil the genuinely quantum NH physics of higher-order EPs, which has opened up a new avenue for future investigations of the higher-order degeneracy application and the dynamic phase transitions of quantum systems.
ER -