GHZ-W Genuinely Entangled Subspace Verification with Adaptive Local Measurements

Jul 10, 2025·
Congcong Zheng
,
Ping Xu
Kun WANG
Kun WANG
,
Zaichen Zhang
· 0 min read
Abstract
We construct XZ and rotation strategies for verifying the three-qubit GHZ-W genuinely entangled subspace using local measurements and one-way classical communication. The rotation strategy has an explicit sample complexity of approximately 2.248 times the inverse infidelity times the logarithm of the inverse failure probability. A classification of two-dimensional two-qubit subspaces also identifies entangled subspaces that cannot be verified locally.
Type
Publication
Science China Information Sciences 68, 180511
publication research
Quantum Verification Entangled Subspaces Adaptive Measurements
Kun WANG
Authors
Kun WANG
Associate Researcher

I am an Associate Researcher and Outstanding Young Talent in the College of Computer Science and Technology, National University of Defense Technology (NUDT).

My research develops practical foundations for reliable and scalable quantum information processing. I work across photonic quantum computing, quantum characterization, verification and validation, distributed quantum estimation, and quantum information theory.

Before joining NUDT, I was a Senior Researcher at the Institute for Quantum Computing, Baidu Research, from 2020 to 2023. I led the development of the Quantum Error Processing (QEP) toolkit for characterizing, mitigating, and correcting errors in quantum devices through software. I received the Shenzhen Industrial Development and Innovation Talent Award in 2023.

Previously, I was a postdoc at the Shenzhen Institute for Quantum Science and Engineering (SIQSE), Southern University of Science and Technology, where I worked with Prof. Masahito Hayashi.