One-Step Generation of Energy-Time-Polarization-Hyper-Entangled W-Class Triphotons: Nonlinear and Linear Optical Responses

作者：Zhang, Siqiang; Tang, Haitian; Wei, Jiajia; Wei, Jiaxuan; Ahmed, Irfan^*; Zhang, Yanpeng^*

来源：Annalen der Physik (Leipzig), 2023, 535(11).

DOI：10.1002/andp.202300208

• hyper-entanglement
• polarized dressing
• spontaneous six-wave mixing
• W-class triphotons

Nonclassical multiphoton have attracted extensive attention to serve as entangled resources for quantum information technology. Here, the continuous-mode hyper-entangled W-class triphotons are theoretically generated through spontaneous six-wave mixing (SSWM) in 85Rb. In nonlinear optical response, Zeeman sub-states are high-dimensionally quantized by polarized dressing. High-dimensional entanglement is structured via atomic non-Hermitian nature. Through linear optical response, the temporal correlations are shaped via diverse polarized dressing. SSWM-based triphoton is a genuine triphoton possessing non-Gaussian tripartite entanglement. The high production rate is due to co-action of three strong input fields, electromagnetically induced transparency (EIT) protection, and slow light effect. Non-Hermitian nature endows the system with sensitive adjustability around exceptional points (EP). Eventually, the results demonstrate multiple SSWMs causing oscillations with multiple periods in three-photon temporal correlations for the nonlinear region, build a high-dimensional three-body entangled quantum network and transform multifarious profiles of the three-photon temporal correlations for the linear region. Especially, both high-dimensional and hyper entanglements are obtained, contributing to high quantum information capacity. Further, the system is switched among multiple states when non-Hermitian nature is manipulated by polarized dressing. The research opens a broad prospect for generating the hyper-entangled multiphoton with potential application in adjustable quantum networks of high information capacity. @@@ A theoretical study is conducted on hyper-entangled W-class triphotons generated via polarized dressed spontaneous six-wave mixing in thermal atomic ensembles. The quantum optical characteristics of triphotons are explored by examining nonlinear and linear optical responses. The generation mechanism is also interpreted through non-Hermitian physics. The results can be potentially applied in adjustable quantum networks.image

• 单位
  西安交通大学; i