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Updated: Sep 28, 2025

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Efficient Bipartite Entanglement Detection Scheme with a Quantum Adversarial Solver.

Xu-Fei Yin1,2,3, Yuxuan Du4,5, Yue-Yang Fei1,2,3

  • 1Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China.

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|April 1, 2022
PubMed
Summary
This summary is machine-generated.

We developed an efficient quantum adversarial method for detecting bipartite entanglement, transforming it into a game solvable with quantum circuits. This approach successfully identifies entanglement in quantum states, paving the way for quantum machine applications.

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Area of Science:

  • Quantum Information Science
  • Quantum Computing
  • Quantum Entanglement

Background:

  • Entanglement state recognition is challenging without prior information.
  • Efficient detection of bipartite entanglement is crucial for quantum information processing.

Purpose of the Study:

  • To propose an efficient quantum adversarial bipartite entanglement detection scheme.
  • To address the difficulty of recognizing entanglement states with no prior information.

Main Methods:

  • Reformulated bipartite entanglement detection as a two-player zero-sum game.
  • Utilized parameterized quantum circuits and two-outcome measurements.
  • Achieved a runtime complexity of O(poly(N)T) for N-qubit states.

Main Results:

  • Successfully implemented the protocol on a linear optical network.
  • Demonstrated effectiveness in detecting bipartite entanglement for 5-qubit pure states.
  • Showcased effectiveness for 2-qubit mixed states.

Conclusions:

  • The proposed scheme offers an efficient method for bipartite entanglement detection.
  • Experimental validation confirms the protocol's effectiveness.
  • This work enables near-term quantum machines for multipartite entanglement detection.