Condensed Matter Journal Club: Deconfined Quantum Criticality in Quantum Spin Models
- Event Type
- Seminar/Symposium
- Sponsor
- Condensed Matter Journal Club
- Location
- Loomis 222
- Date
- Dec 4, 2024 3:00 pm
- Speaker
- Xuan Zou (Tsinghua University, UIUC)
- Contact
- Amanda Gatto Lamas
- amandag6@illinois.edu
- Views
- 76
- Originating Calendar
- Physics - Condensed Matter Journal Club
Deconfined quantum critical points (DQCPs) describe continuous phase transitions beyond the Landau-Ginzburg-Wilson paradigm, occurring between two phases characterized by distinct symmetry breaking. The debate over whether genuine DQCPs exist in physical SU(2) spin systems or if the transitions are weakly first-order has been ongoing for many years. In this talk, I will first provide a brief introduction to the concepts of DQCPs, emphasizing their development through experimental and numerical findings and presenting theoretical perspectives. I will then present our quantum Monte Carlo simulations on two models: the checkerboard J-Q model, inspired by experimental observations in SrCu2(BO3)2, and a non-Hermitian easy-plane J-Q model, designed to investigate how non-Hermitian interactions influence transitions that exhibit DQCP behavior.