On June 16th, the School of Physics and Electronics held a "Dongjian Forum" report meeting in the Shuhui Hall Lecture Hall of Changqing Lake Campus. Professor Wang Bogen, the dean of the School of Physics at Nanjing University, was invited to give an academic report. CAI Yangjian, a member of the Standing Committee of the Party Committee and Vice President of the university, presented the "Dongjian Forum" lecture cup to Wang Bogen. More than 200 people, including Du Wei, the deputy secretary of the Party Committee of the college, Zhang Chao, the vice dean for academic affairs, relevant professional teachers, postgraduate and undergraduate students, participated in this event. The report meeting was presided over by Vice President Song Yuzhi.

Professor Wang Bogen delivered an academic report titled "Fractional Quantum Hall States Derived in Boson Systems". He pointed out that as an important milestone in condensed matter physics, the fractional quantum Hall effect reveals that the correlated electron system can give rise to new topological states beyond the Landau paradigm, opening up a new path for exploring topological quantum states. Starting from the research background, this report focuses on applying the Chern-Simons field theory method to handle correlated quantum spin systems and proposes a new theoretical description framework for antiferromagnetic states. Professor Wang Bogen highlighted the significant discovery of his team: In a two-layer system with electron-hole imbalance, the hindrance effect induces strong quantum fluctuations, causing excitons not to undergo conventional condensation but to evolve into fractional quantum Hall state - exciton topological orders with long-range quantum entanglement properties. Key experimental evidence includes: under zero magnetic field conditions, physical gaps caused by exciton hindrance, chiral exciton edge states, and strange edge state transport phenomena have been observed. These phenomena jointly confirm that the system has undergone spontaneous breaking of time-reversal symmetry. This work, through the close integration of theory and experiment, has for the first time revealed strong evidence of the existence of fractional quantum Hall states in exciton systems.

After the report, Professor Wang Bogen interacted and communicated with the teachers and students on the spot, patiently and in detail answering the questions raised by them, deepening the breadth and depth of this academic exchange, and was warmly welcomed by the teachers and students. This "Dongjian Forum" effectively promoted the collision of academic ideas, stimulated the strong interest of teachers and students in the cutting-edge research of condensed matter physics, and injected new vitality into the continuous innovation and development of related fields in the college.

Wang Bogen is a professor and doctoral supervisor at the School of Physics, Nanjing University, and currently serves as the dean of the School of Physics, Nanjing University. In 2008, he was awarded the National Science Fund for Distinguished Young Scholars. In 2009, he was selected as a Specially-appointed professor of the Chang Jiang Scholars Program of the Ministry of Education and the chief scientist of the National Key Research and Development Program. For a long time, I have been engaged in condensed matter physics research, including the study of charge and spin transport characteristics in low-dimensional quantum structures using the non-equilibrium Green's function method, as well as the study of novel quantum states and their phase transitions in correlated electron systems using the renormalization group method. More than 160 SCI papers have been published in academic journals such as Nature, Nature's sub-journals and PRL, and invited to give invited reports at domestic and international academic conferences such as APS March Meeting.