Background

From the discovery of high-Tc cuprates, Anderson conjectured that an antiferromagnetic Heisenberg model on square lattice with nearest neighbor (NN) couplings J1 and next nearest neighbor (NNN) couplings J2 (known as the square lattice J1-J2 model) would also support a quantum spin liquid state, which could serve as the primary low-energy metastable state and could be the key mechanism to high-Tc cuprates. According to Anderson’s RVB scenario for quantum spin liquid, a superconducting ground state will naturally develop upon doping. In the early days of high-Tc research, the square lattice J1-J2 model was thus one of the most important frustrated magnet models, and attracted intense research interest, both theoretically and experimentally.

Very recently, many new duality relations and quantum anomalies are discovered for DQCP, and these different formulations give rise to completely different pictures for our understanding of DQCP. In particular, On one hand, it has been shown that DQCP can be regarded as a special class of anomalous gapless surface phase of certain topological states. On the other hand, DQCP can also be regarded as a theory describing topological phases transitions. Thus, DQCP also builds up a natural relation between topological phase transitions and anomalous gapless surface phase. Such a triangular relation among DQCP, anomalous gapless surface phase and topological phase transitions might be very universal and apply to any quantum phase transitions beyond the Landau theory.

 

Date

January 7-9, 2020

 

Venue

Room G26, G/F., Science Centre North Block, The Chinese University of Hong Kong, Shatin, Hong Kong

 

Invited Speakers

Prof. Xiao-Gang Wen, Massachusetts Institute of Technology, USA

Prof. Gang Chen, The University of Hong Kong, Hong Kong

Prof. Weiqiang Chen, Southern University of Science and Technology, China

Prof. Xi Dai, The Hong Kong University of Science and Technology, Hong Kong

Prof. Shoushu Gong, Beihang University, China

Dr. Wenyuan Liu, The Chinese University of Hong Kong, Hong Kong

Prof. Jianjian Miao, The Chinese University of Hong Kong, Hong Kong

Prof. Tai-Kai Ng, The Hong Kong University of Science and Technology, Hong Kong

Dr. Shang-Qiang Ning, The University of Hong Kong, Hong Kong

Prof. Dong-Ning Sheng, California State University, USA

Prof. Ziqiang Wang, Boston College, USA

Dr.Jianhao Zhang, Tsinghua University, China

Prof. Fei Zhou, University of British Columbia, Canada

 

Organizing Committee

Prof. Zhengcheng Gu, The Chinese University of Hong Kong, Hong Kong

Prof. Xiao-Gang Wen, Massachusetts Institute of Technology, USA

Prof. Chenjie Wang, The University of Hong Kong, Hong Kong

 

Organizer

Department of Physics and Institute of Theoretical Physics, The Chinese University of Hong Kong

 

For Enquiries

Please contact Ms. P. Y. Ho at pyho@phy.cuhk.edu.hk.