Temperature dependence of pion condensation instability

The π-condensate instability of nuclear matter via its temperature corresponding to a given energy of excitation is investigated. The π N, NN, NΔ33 interactions in the nuclear matter and their influence on the π-condensate instability at T >=0 are discussed. There is found the dependence of the critical density rho sub(cr)(T) on T under various assumption of the nuclear interactions and the dependence of the rhosub(cr) (T) on the volume of the system when the temperature is being varied