Entanglement Negativity and Exceptional-Point Signatures in a PT-Symmetric Non-Hermitian XY Dimer: Parameter Regimes and Directional-Coupler Mapping

We investigate a non-Hermitian two-spin XY model driven by alternating real and imaginary transverse fields and derive an explicit analytic formula for the ground-state entanglement negativity. This provides a systematic analytic characterization of how ground-state entanglement behaves across PT-sy...

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Principais autores:	Linzhi Jiang, Weicheng Miao, Wen-Yang Sun, Wenchao Ma
格式:	Artigo
語言:	Inglês
出版:	MDPI AG 2025-12-01
叢編:	Photonics
主題:	PT symmetry non-Hermitian spin models entanglement negativity exceptional point integrated photonics quantum tomography
在線閱讀:	https://www.mdpi.com/2304-6732/12/12/1239
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