Quantum Memory Assisted Entangled State Verification with Local Measurements

Jan 2, 2025·
Siyuan Chen
,
Wei Xie
,
Ping Xu
Kun WANG
Kun WANG
Corresponding Author
· 0 min read
Abstract
We consider quantum-memory-assisted state verification, where local verifiers store several copies of multipartite entangled states and measure them collectively. We derive an exact formula for optimizing two-copy verification and give a globally optimal two-copy strategy for multi-qubit graph states using only Bell measurements. For arbitrary memory capacity, we present a dimension-expansion technique and apply it to GHZ-like states. The resulting strategies become more efficient as memory resources grow and approach the theoretical limit.
Type
Publication
Physical Review Research 7, 013003
publication research
Quantum Verification Quantum Memory QCVV
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.