Study on microscopic mechanism of nematic LCD using quantum theory

In this paper, we researched the collective effect of nematic LCD using quantum theory. The Hamiltonian of system can be expressed by the quasi-creation operator and the quasi destruction operator, which are associated with two kinds of eigenstate of system. In a proper approximation, the Hamiltonian could be diagonalizable. Then the scalar order parameter S is derived, and the expression is in accordance with the result of experiment.