  In solving the problem of finding a temperature distribution which, at zero
temperature, corresponds to superfluidity, i.e., to nonzero energy, the author
tried to quantize free energy. This was done on the basis of supersecondary
quantization whose special case is the usual secondary quantization for bosons
and with the help of which new representations of the Schr\"odinger equation
were obtained. The supersecondary quantization allowed the author to construct
a variational method whose zero approximation are the Hartree-Fock and
Bogolyubov-BCSch variational principles. This method works especially well in
the case of not a large number of particles. The new quantization and the
variational method are of general character and can be used in the quantum
field theory.
