Postdoctoral fellow
Department of Physics, University of Hong Kong
Room 217, HOC Building
Email: bchenhku@hku.hk | bunbun.d.chan@gmail.com
Research Interests
Developing accurate methods in quantum many-body computations intrigues people in contemporary condensed matter physics and also other relevant fields, which also poses a great challenge. In particular, efficient simulations at finite temperature are indispensable to bridge theoretical many-body models to quantum material measurements, and are also of fundamental interest.
My research interest focuses on the efficient numerical simulations of quantum many-body systems, including both spin and fermion systems. Working on the tensor network state, an efficient wave-function ansatz, we have proposed several finite-temperature algorithms, in order to accurately simulate strongly correlated systems and calculate the thermodynamic properties down to low temperature.
Utilizing the powerful tensor network methods, mainly the exponential tensor renormalization group (XTRG) and the renowned density matrix renormalization group (DMRG), we simulate frustrated spin systems as well as fermion systems with high precision, and discover novel many-body phenomena, including, two-temperature scale and the Kosterlitz-Thouless phase in frustrated spin systems, chiral spin liquid in triangular lattice Hubbard model, etc.
Educations
Feb 2018 - Mar 2020 |
Joint PhD student in Ludwig-Maximilians University, Munich |
Sep 2015 - Jul 2021 |
PhD student in Beihang University, Beijing |
Sep 2011 - Jul 2015 |
Undergraduate student in Beihang University, Beijing |
Publications
Oct 4, 2021 |
“Exciton Proliferation and Fate of the Topological Mott Insulator in a Twisted Bilayer Graphene Lattice Model ” |
Jun 08, 2021 |
“Parallel-Chain Monte Carlo Based on Generative Neural Networks” |
Feb 10, 2021 |
“Quantum Spin Liquid with Emergent Chiral Order in the Triangular-lattice Hubbard Model” |
Nov 15, 2020 |
“Realization of Topological Mott Insulator in a Twisted Bilayer Graphene Lattice Model” |
Aug 5, 2020 |
“Quantum Many-Body Simulations of the 2D Fermi-Hubbard Model in Ultracold Optical Lattices” |
Dec 5, 2019 |
“Automatic Differentiation for Second Renormalization of Tensor Networks” |
Dec 30, 2017 |
“Exponential Thermal Tensor Network Approach for Quantum Lattice Models” |
Sep 5, 2016 |
“Series-expansion thermal tensor network approach for quantum lattice models” |
Aug 25, 2020 |
“Kondo holes in the 2D itinerant Ising ferromagnet Fe3GeTe2” |
Jul 18, 2019 |
“Kosterlitz-Thouless melting of magnetic order in the triangular quantum Ising material TmMgGaO4” |
Apr 12, 2019 |
“Thermal Tensor Renormalization Group Simulations of Square-Lattice Quantum Spin Models” |
Nov 4, 2018 |
“Two-temperature scales in the triangular-lattice Heisenberg antiferromagnet” |