Efficient Bipartite Entanglement Detection Scheme with a Quantum Adversarial Solver

Xu-Fei Yin

Yuxuan Du

Yue-Yang Fei

Rui Zhang

Li-Zheng Liu

Yingqiu Mao

Tongliang Liu

Min-Hsiu Hsieh

Li Li

Nai-Le Liu

Dacheng Tao

Yu-Ao Chen

Jian-Wei Pan

Phys. Rev. Lett. 128, 110501

出版日期

May 14, 2022

摘要

The recognition of entanglement states is a notoriously difficult problem when no prior information is available. Here, we propose an efficient quantum adversarial bipartite entanglement detection scheme to address this issue. Our proposal reformulates the bipartite entanglement detection as a two-player zero-sum game completed by parameterized quantum circuits, where a two-outcome measurement can be used to query a classical binary result about whether the input state is bipartite entangled or not. In principle, for an N-qubit quantum state, the runtime complexity of our proposal is O(poly(N)T) with T being the number of iterations. We experimentally implement our protocol on a linear optical network and exhibit its effectiveness to accomplish the bipartite entanglement detection for 5-qubit quantum pure states and 2-qubit quantum mixed states. Our work paves the way for using near-term quantum machines to tackle entanglement detection on multipartite entangled quantum systems.

研究中心

量子計算研究所

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