Thermodynamic of mixtures of ultracold Rydberg gases with different levels of excitation

The physical model of the particle system describing the thermodynamics of mixtures of ultracold Rydberg gases with different levels of excitation are proposed. In our model system of particles is a mixture of atoms in S -state and atoms in the P -state. To calculate the thermodynamic of the mixture Rydberg gases the method of Monte-Carlo was used. Computational results of the spatial correlations of dipoles depending on the coupling parameter are presented. At some value of the nonideality parameter the dipole chains are formed. (paper)