  The quantum vacuum contribution to Berry's geometric phase of photon fields
inside a noncoplanarly curved (coiled) fiber is considered by means of the
second-quantization formulation. It is shown that the quantum vacuum Berry's
phases of left- and right-handed circularly polarized light have the equal
magnitudes but opposite signs, and are therefore eliminated entirely by each
other. In order to realize such a novel vacuum effect, a scheme to separate the
quantum vacuum Berry's phase of one polarized light from another by using the
chiral medium fiber is suggested. We think the present study might be the first
treatment for the time evolution of vacuum zero-point energy.
