Fluctuation effects in block copolymers

Using recently developed techniques for locating phase transitions, we study the effects of fluctuations in a field theoretic model on block copolymer behavior. Specifically, we couple the use of complex Langevin dynamics within a field theoretic framework and thermodynamic integration techniques for the calculation of free energies of fluctuating systems to show a revised prediction of the diblock copolymer phase diagram. Further, these methods are extended into blend systems to investigate unbinding transitions and critical micelle concentrations in cylindrical phases.