Ren, Changliang

Changliang Ren is a Professor and Ph.D. Supervisor at Hunan Normal University, China. He received his Ph.D. in Physics from the University of Science and Technology of China in 2009. He subsequently held research and academic positions at Korea University, Hiroshima University, and the Chongqing Institute of the Chinese Academy of Sciences before joining Hunan Normal University.

His research focuses on quantum physics, quantum optics, and quantum information theory, with particular interests in quantum correlations, quantum measurement, quantum metrology, and quantum sensing. He has published more than 70 papers in leading international journals, including Physics Reports, Physical Review Letters, Photonics Research, Quantum Science and Technology etc. His recent work explores the fundamental limits of quantum resource recycling, sequential quantum measurements, and quantum-enhanced sensing.

A Unified Framework for Sequential Quantum Correlation Sharing

• Speaker: Changliang Ren

(Department of Physics, Hunan Normal University, Changsha 410081, China)

• Event: Quantum Technology Workshop 2026

Quantum measurements not only extract information but also reshape quantum states through measurement backaction, thereby determining how quantum resources can be distributed and recycled. In this talk, recent progress on the sequential sharing of quantum correlations will be reviewed from the perspective of generalized quantum measurements and quantum instruments. Particular emphasis will be placed on Bell nonlocality, EPR steering, entanglement, network nonlocality, and contextuality under sequential and weak-measurement scenarios. Recent advances on complementarity-based correlation sharing and unified measurement frameworks beyond conventional POVM descriptions will also be discussed, highlighting how different Kraus structures govern resource dissipation, robustness, and quantum resource recycling in multipartite and sequential quantum information protocols.

REFERENCE STYLE

[1] Z. Cai, C. Ren*, T. Feng, X. Zhou, J. Chen , A review of quantum correlation sharing: The recycling of quantum correlations triggered by quantum measurements, Physics Reports 1098, 1-53(2025). [2] Z. Cai, J. Song,. A. Asadian, C. Ren*, Unified Framework for Quantum Resource Recycling via Instrument-Dependent Back-action, arXiv:2605.03513. [3] Z. Cai, C. Ren*, Entanglement sharing in sequential quantum measurements revealed by complementarity, Phys. Rev. A, 113, 012217 (2026). [4] C. Ren*, X. Liu, W. Hou, T. Feng and X. Zhou , Nonlocality sharing for a three-qubit system via multilateral sequential measurements, Phys. Rev. A 105, 052221 (2022). [5] W. Hou, X. Liu, and C. Ren*, Network nonlocality sharing via weak measurements in the extended bilocal scenario, Phys. Rev. A 105, 042436 (2022). [6] T. Feng, C, Ren*, Y, Tian, M, Luo, H, Shi, J, Chen, and X, Zhou, Observation of nonlocality sharing via not-so-weak measurements, Phys. Rev. A 102, 032220 (2020).