Quantum Entanglement Swapping between Two Multipartite Entangled States

Xiaolong Su, Caixing Tian, Xiaowei Deng, Qiang Li, Changde Xie, and Kunchi Peng
Phys. Rev. Lett. 117, 240503 – Published 6 December 2016
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Abstract

Quantum entanglement swapping is one of the most promising ways to realize the quantum connection among local quantum nodes. In this Letter, we present an experimental demonstration of the entanglement swapping between two independent multipartite entangled states, each of which involves a tripartite Greenberger-Horne-Zeilinger (GHZ) entangled state of an optical field. The entanglement swapping is implemented deterministically by means of a joint measurement on two optical modes coming from the two multipartite entangled states respectively and the classical feedforward of the measurement results. After entanglement swapping the two independent multipartite entangled states are merged into a large entangled state in which all unmeasured quantum modes are entangled. The entanglement swapping between a tripartite GHZ state and an Einstein-Podolsky-Rosen entangled state is also demonstrated and the dependence of the resultant entanglement on transmission loss is investigated. The presented experiment provides a feasible technical reference for constructing more complicated quantum networks.

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  • Received 7 July 2016

DOI:https://doi.org/10.1103/PhysRevLett.117.240503

© 2016 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & OpticalQuantum Information, Science & Technology

Authors & Affiliations

Xiaolong Su1,2, Caixing Tian1,2, Xiaowei Deng1,2, Qiang Li1,2, Changde Xie1,2, and Kunchi Peng1,2,*

  • 1State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, People’s Republic of China
  • 2Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan Shanxi 030006, People’s Republic of China

  • *kcpeng@sxu.edu.cn

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Issue

Vol. 117, Iss. 24 — 9 December 2016

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