Experimental 61-partite entanglement on a three-dimensional photonic chip

Author:

Zhou Wen-Hao1,Jiao Zhi-Qiang1,Li Hang1,Gao Jun1,Wang Xiao-Wei1,Ren Ruo-Jing1,Xu Xiao-Yun1ORCID,Qiao Lu-Feng1,Jin Xian-Min12ORCID

Affiliation:

1. Hefei National Laboratory

2. TuringQ Co., Ltd.

Abstract

Multipartite entanglements are essential resources for proceeding tasks in quantum information science and technology. However, generating and verifying them present significant challenges, such as the stringent requirements for manipulations and the need for a huge number of building-blocks as the systems scale up. Here, we propose and experimentally demonstrate the heralded multipartite entanglements on a three-dimensional photonic chip. Integrated photonics provide a physically scalable way to achieve an extensive and adjustable architecture. Through sophisticated Hamiltonian engineering, we are able to control the coherent evolution of shared single photon in the multiple spatial modes, dynamically tuning the induced high-order W-states of different orders in a single photonic chip. Using an effective witness, we successfully observe and verify 61-partite quantum entanglements in a 121-site photonic lattice. Our results, together with the single-site-addressable platform, offer new insights into the accessible size of quantum entanglements and may facilitate the developments of large-scale quantum information processing applications.

Funder

National Key Research and Development Program of China

National Natural Science Foundation of China

Shanghai Municipal Education Commission

China Postdoctoral Science Foundation

Publisher

Optica Publishing Group

Subject

Atomic and Molecular Physics, and Optics

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