Formation of ordered structures of exciton condensed phases in quantum wells

The spatial distribution of the density of indirect excitons is studied in double quantum well in the case when condensed and gas phases coexist. The both the nucleation (Lifshits-Slyozov-Wagner) theory and spinodal decomposition (Chan-Hillert) theory are applied generating them on a system of unstable particles. Comparison with experiments is presented. The creation of structures in non-homogeneous external fields is investigated. The periodical distribution density, which arises in quantum well under a slot in conductive electrode, is analyzed in detail. The transformation of the structures with changing of a pumping and a width of the slot.