Measurement-device-independent continuous variable entanglement witness in a quantum network

Jing Fu; Xutong Wang; Shengshuai Liu; Jietai Jing

doi:10.1038/s41377-025-02039-x

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Measurement-device-independent continuous variable entanglement witness in a quantum network

Original Articles

- Measurement-device-independent continuous variable entanglement witness in a quantum network
- Light: Science & Applications Vol. 14, Issue 12, Pages: 4059-4067(2025)
- Affiliations：
  
  1.State Key Laboratory of Precision Spectroscopy, Joint Institute of Advanced Science and Technology, School of Physics and Electronic Science, East China Normal University, Shanghai, China
  2.Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi, China
  3.CAS Center for Excellence in Ultra-intense Laser Science, Shanghai, China
- Author bio：
  
  Shengshuai Liu (ssliu@lps.ecnu.edu.cn)
  Jietai Jing (jtjing@phy.ecnu.edu.cn)
- Funds：
- DOI：10.1038/s41377-025-02039-x
  CLC：
- Received：16 June 2025，
  
  Revised：2025-08-19，
  
  Accepted：04 September 2025，
  
  Published Online：03 November 2025，
  
  Published：31 December 2025
- Accepted：
Scan QR Code
Fu, J. et al. Measurement-device-independent continuous variable entanglement witness in a quantum network. Light: Science & Applications, 14, 4059-4067 (2025).
DOI：

Fu, J. et al. Measurement-device-independent continuous variable entanglement witness in a quantum network. Light: Science & Applications, 14, 4059-4067 (2025). DOI： 10.1038/s41377-025-02039-x.

摘要

Abstract

The reliable detection of entanglement plays a crucial role in the construction of quantum networks. The conventional entanglement witness (EW) method has high requirements for measurement device and relies on reliable implementation of the measurement. With unreliable measurement device

EW process can be easily attacked by eavesdroppers

which can lead to incorrect entanglement detection results. Therefore

a feasible and secure measurement device independent entanglement witness (MDIEW) method is desired for constructing quantum networks. Here

we detect the continuous variable entanglement by a MDIEW in a quantum network. It is demonstrated that the conventional EW method can be affected when the local oscillator intensity is changed

while the MDIEW method can detect entanglement between users without being affected. Our results provide a trustworthy method to detect entanglement

which is an important step for constructing secure quantum networks.

关键词

Keywords

references

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