PIRSA:25120055

Complexity of quantum many-body dynamics - Quantum Matter Seminar

(2025). Complexity of quantum many-body dynamics - Quantum Matter Seminar. Perimeter Institute. https://pirsa.org/25120055

Complexity of quantum many-body dynamics - Quantum Matter Seminar. Perimeter Institute, Dec. 01, 2025, https://pirsa.org/25120055 

          @misc{ pirsa_PIRSA:25120055,
            doi = {},
            url = {https://pirsa.org/25120055},
            author = {},
            keywords = {Condensed Matter},
            language = {en},
            title = {Complexity of quantum many-body dynamics - Quantum Matter Seminar},
            publisher = {Perimeter Institute},
            year = {2025},
            month = {dec},
            note = {PIRSA:25120055 see, \url{https://pirsa.org}}
          }
Xiehang Yu
Talk numberPIRSA:25120055
Collection
Talk Type Other
Subject

Abstract

In this talk, I will discuss the projects I have done in my Ph.D. https://scholar.google.com/citations?user=SiMLZi8AAAAJ&hl=en. My research lies at the intersection of quantum many-body physics and quantum information, aiming to unravel the intrinsic complexity of many-body dynamics using both analytical methods and quantum informational approaches. In the first direction, we develop several analytical frameworks, including solvable quantum circuit dynamics, tensor-network states, and non-equilibrium field-theoretic calculations, to study both non-equilibrium physics and open-system dynamics. In particular, we proposed the concept of mixed state deep thermalization, a new paradigm that extends conventional thermalization to the ensemble of conditional mixed states. In the second direction, we investigate the quantum complexity of non-Markovian open many-body systems, establishing Lieb–Robinson bounds and determining the optimal digital-simulation resources required to simulate such dynamics.