Quantum CZ gates on a single gradient metasurface

Qi Liu; Yu Tian; Zhaohua Tian; Yali Jia; Guixin Li; Xi-Feng Ren; Qihuang Gong; Ying Gu

doi:10.1038/s41377-025-01871-5

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Quantum CZ gates on a single gradient metasurface

Original Articles

- Quantum CZ gates on a single gradient metasurface
- Light: Science & Applications Vol. 14, Issue 7, Pages: 2001-2008(2025)
- Affiliations：
  
  1.State Key Laboratory of Artificial Microstructure and Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, China
  2.Frontiers Science Center for Nano-optoelectronics & Collaborative Innovation Center of Quantum Matter & Beijing Academy of Quantum Information Sciences, Peking University, Beijing 100871, China
  3.Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
  4.CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
  5.Hefei National Laboratory, Hefei 230088, China
  6.Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China
  7.Peking University Yangtze Delta Institute of Optoelectronics, Nantong 226010, China
- Author bio：
  
  Ying Gu (ygu@pku.edu.cn)
- Funds：
- DOI：10.1038/s41377-025-01871-5
  CLC：
- Received：06 December 2024，
  
  Revised：15 April 2025，
  
  Accepted：17 April 2025，
  
  Published Online：13 May 2025，
  
  Published：31 July 2025
- Accepted：
Scan QR Code
Liu, Q. et al. Quantum CZ gates on a single gradient metasurface. Light: Science & Applications, 14, 2001-2008 (2025).
DOI：

Liu, Q. et al. Quantum CZ gates on a single gradient metasurface. Light: Science & Applications, 14, 2001-2008 (2025). DOI： 10.1038/s41377-025-01871-5.

摘要

Abstract

For the requirement of quantum photonic integration in on-chip quantum information

we propose a scheme to realize quantum controlled-Z (CZ) gates through single gradient metasurface. Using its parallel beam-splitting feature

i.e.

a series of connected beamsplitters with the same splitting ratio

one metasurface can support a polarization encoding CZ gate or path encoding CZ gate

several independent CZ gates

and cascade CZ gates. Taking advantage that the path of output state is locked by the polarization of input state

path encoding CZ gates can efficiently filter out bit-flip errors coming from beam-splitting processes. These CZ gates also have the potential to detect quantum errors and generate high-dimensional entanglement through multi-degree-of-freedom correlation on metasurfaces. By integrating quantum CZ gates into a single metasurface

our results open an avenue for high-density and multifunctional integration of quantum devices.

关键词

Keywords

references

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