  We propose a version of the volume conjecture that would relate a certain
limit of the colored Jones polynomials of a knot to the volume function defined
by a representation of the fundamental group of the knot complement to the
special linear group of degree two over complex numbers. We also confirm the
conjecture for the figure-eight knot and torus knots. This version is different
from S. Gukov's because of a choice of polarization.
