  The properties of the low-energy 12C+12C molecular resonances, which
potentially enhance the fusion reaction rate at low temperatures, have been
investigated by a full-microscopic nuclear model employing various nuclear
energy density functionals. We show that some density functionals plausibly
describe the observed high-spin 12C+12C molecular resonances and predict many
0+ and 2+ resonances at low energies, which enhance the reaction rate. We also
discuss how the uncertainty in the nuclear energy density functionals
propagates to that of the reaction rate.
