Journal of Physical Studies 15(3), Article 3003 [7 pages] (2011) DOI: https://doi.org/10.30970/jps.15.3003 RANDOM PHASE APPROXIMATION FOR BOSE SYSTEMS ABOVE THE TEMPERATURE OF PHASE TRANSITION I. O. Vakarchuk, V. S. Pastukhov Ivan Franko National University of Lviv, Department for Theoretical Physics, 12, Drahomanov St., Lviv, UA--79005, Ukraine

The theory of non-superfluid Bose-liquid is built. In the general case the properties of the spectrum of collective modes are analyzed. The most simple estimation for the critical exponent $η$ is made.

PACS number(s): 05.30.Jp, 03.75.Kk, 64.60.F-

pdf