PHYSICS/BK21 Seminar[09.06.02]

"       “Entanglement perturbation theory : a novel
     many-body Method in statistical mechanics
           and strong correlation physics”
  
♦Speaker : Prof. Sung Gong Chung (Western Michigan Univ.)
♦Place : Physics Seminar Room (Science Bldg, 3-201)
♦Date & Time : June,  2(Tue)  4:00  ~  5:00 pm

Abstract
  
Since the very beginning of quantum theory, to calculate the partition functions and solve the Schrodinger
equation for macroscopic quantum systems have been a fundamental task of theoretical physics. It would
not be an exaggeration to say that due  to  lack  of  such  methods,  a  tremendous  effort  of  theoretical
physicists has been devoted to the development of  a  variety  of  approximate  methods  and  numerical
simulations. While we have seen a  considerable  progress  in  rigorous  treatment  of  quantum  1D  and
classical 2D systems over the last several decades, these rigorous methods cannot handle non-integrable
models nor generalizable to higher dimensions. On the other hand, the method of numerical renormalization
group has seen a remarkable success in quantum 1D systems and in finite  Fermi  systems.  However,  in
spite of a huge effort, this approach has not been quite successful for macroscopic 2D quantum systems,
indicating the very idea of Hilbert space truncation breaks down in two dimensions. Over the recent years,
we have been  developing  a  novel  many-body  method,  entanglement  perturbation  theory (EPT),  for
calculating partition functions and solve the Schrodinger equation,  particularly in the strongly correlated
condensed matter systems.  

             Contact Person : Prof. Byung Il Min(054-279-2074, bimin@postech.ac.kr)
"