Spontaneous breaking of Euclidean invariance oand classifications of topologically stable defects and configurations of crystals and crystals and liquid crystals

Collection : Michel, Louis

Auteur(e.s) : MICHEL

Date : 12/1977

Description : Abstract : We show how many mesomorphic states illustrate the following general scheme: The symmetry group of an equilibrium state of Euclidean-invariant quantum statistical mechanics is a subgroup H of the Euclidean group E such that the orbit E/H is compact. Moreover, the homotopy groups of
E/H yield a classification of the topologically stable defects and configurations of these ordered media. This suggests a predictive value of this scheme for yet unobserved media and for defects.

Sujet(s) : THEORIE QUANTIQUE

Source : P/77/198

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