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Jie Ren

Personal data

Contact information

School of Physics and Astronomy
University of Leeds
Leeds LS2 9JT, UK

Room: 3.16 Bragg Building
Email: [email protected]

Positions

  • 2024– : Postdoctoral Research Fellow, University of Leeds

Education

  • 2019–2024: PhD in Theoretical Physics, Institute of Physics, Chinese Academy of Sciences

  • 2015–2019: BSc in Physics, University of Chinese Academy of Sciences

Research interests

I work on quantum many-body dynamics, mainly on questions of how thermalisation can fail in interacting systems. My recent focus has been on quantum many-body scars, Hilbert space fragmentation, and other mechanisms that lead to unusually long-lived non-thermal behaviour. I also study various quantum circuit models, which often provide simple settings where one can understand dynamical features more clearly.

I am interested in monitored and open quantum systems as well, especially situations where measurements or dissipation produce new phases or unusual transport. More broadly, I like using ideas from quantum information to think about many-body dynamics, and I often work with numerical tools such as exact diagonalisation, tensor networks, and Gaussian-state simulations.

Programming skills

  • Exact diagonalisation: I developed and maintain the Julia package EDKit.jl, which supports general many-body exact diagonalisation. It includes routines for building Hamiltonians in chosen symmetry sectors and works with arbitrary Abelian symmetries. Users can also supply their own customised bases.
  • Tensor network algorithms: I wrote the Julia package iTEBD.jl for infinite TEBD calculations, aimed at quick prototyping and exploratory simulations of one-dimensional systems.
  • Group theory: I developed the Julia package FiniteGroups.jl, which computes character tables and irreducible representations from a user-provided multiplication table. I also wrote a Mathematica package, LieAlgebra, for constructing explicit representations of classical Lie algebras.