String Theory Group at YMSC

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Sinong Liu

Postdoctoral Fellow, Yau Mathematical Sciences Center, Tsinghua University

Basic Information

Email: sinongliu (at) tsinghua.edu.cn
Office: Shuangqing Complex Building C552

Research Areas

Theoretical physics, mathematical physics, quantum gravity, and quantum-information tools in quantum gravity.

Education

2011-2015, B.S., Fudan University.
2016-2021, Ph.D., University of Kentucky.

Research Summary

Sinong Liu studies quantum information, nonequilibrium field theory, and quantum gravity, with a recent emphasis on complexity as a diagnostic of dynamics. His work on Krylov and density-matrix complexity, spread complexity, PXP scars, and topological transitions in the Kitaev chain explores how operator growth and state spreading capture features that are not visible in ordinary correlation functions. Related studies of lowest-Landau-level and half-BPS sectors, quantum quench, and Liouville walls in two-dimensional string theory connect these information-theoretic tools to emergent spacetime and singularity dynamics.

Representative Publications

P. Caputa, N. Gupta, S. S. Haque, S. Liu, J. Murugan, H. J. R. Van Zyl, “Spread Complexity and Topological Transitions in the Kitaev Chain,” JHEP 01 (2023) 120.
P. Caputa, S. Liu, “Quantum Complexity and Topological Phases of Matter,” Phys. Rev. B 106 (2022) 195125, arXiv:2205.05688.
S. R. Das, A. Kaushal, S. Liu, G. Mandal, S. P. Trivedi, “Gauge Invariant Target Space Entanglement in D-Brane Holography,” JHEP 04 (2021) 225.
S. R. Das, S. Hampton, S. Liu, “Quantum Quench in c = 1 Matrix Model and Emergent Space-times,” JHEP 04 (2020) 107.
S. Liu, “Complexity and scaling in quantum quench in 1+1 dimensional fermionic field theories,” JHEP 07 (2019) 104.
A. Bhattacharyya, Z.-S. Gao, L.-Y. Hung, S. Liu, “Exploring the Tensor Networks/AdS Correspondence,” JHEP 08 (2016) 086.