Macroscopic dynamics of chiral smectic C

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Abstract
The hydrodynamic equations describing the macroscopic behaviour of chiral smectic C are presented. To derive these equations the nature of the spontaneously broken continuous symmetries is considered and their consequences for the hydrodynamics are pointed out. Similarities and differences to achiral smectic C and cholesteric liquid crystals are investigated in some detail. The influence and the consequences of ferroelectricity on the hydrodynamics, in particular on the structure of the normal modes, is discussed. In two appendices we study flexoelectric and electrohydrodynamic effects for various other liquid crystalline phases