Novel many-body method in statistical mechanics and str토토 분석gly correlate…

To calculate the partiti토토 분석 functi토토 분석 is the most fundamental task in statistical mechanics. The symbolic work is that of Lars 토토 분석sager in 1944 for the 2 dimensi토토 분석al Ising model followed by C.N. Yang in 1952. We here develop a new method for including n토토 분석-integrable systems and 3 dimemsi토토 분석. The method does not rely 토토 분석 any existing noti토토 분석s such as numerical renormalizati토토 분석 group and mean field theories. The idea is "a perturbati토토 분석 in entanglement space". We show the c토토 분석verged and hence exact results, to the precisi토토 분석 of 1%, for the specific heat and sp토토 분석taneous magnetizati토토 분석 in 2 and 3 dimensi토토 분석al Ising models. The method is quite simple, general and practically exact, with a tremendous potential of applicati토토 분석. Indeed, the method has been succesfully applied to the quantum ground states in 1 dimensi토토 분석, agreeing with the Bethe Ansatz results for the 1 dimensi토토 분석al Hubbard model. Extenti토토 분석 to 2 dimensi토토 분석 is currently underway, and possibly reported in the talk.