Quantum description of the orientational degrees of freedom in a biaxial nematic liquid

Details Quantum description of the orientational degrees of freedom in a biaxial nematic liquid Quantum description of the orientational degrees of freedom in a biaxial nematic liquid

1998-10-19

arxiv.org/abs/cond-mat/9810236v1

Physics

Condensed Matter

33 pages, Latex, 11 figures

Scientific paper

10.1016/S0378-4371(99)00200-9

The quantum mechanical version of a classical model for studying the orientational degrees of freedom corresponding to a nematic liquid composed of biaxial molecules is presented. The effective degrees of freedom are described by operators carrying an SU(3) representation, which allows the explicit calculation of the partition function in the mean field approximation. The algebraic consistency conditions are solved numerically and the equilibrium phases of the system are determined. In particular, the entropy, the specific heat and the order parameters are presented for different choices of the constituent biaxial molecules. Our results reproduce the classical calculation in the limit of high temperatures and high quantum numbers.

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