The Spontaneous Broken Symmetry and Acoustic Speed in The Neutron Stars

The relation between the spontaneously broken symmetries and the acoustic speed in the neutron stars is discussed in this paper with σ-model and under the effects of the various vaccum state on the compact stars. Because of the existence of the abnomal nuclear state in the strong gravitational field, the acoustic speed Vs may be larger than the speed of light, C.This result might largely change the upper-limit of the mass of neutron stars and mag provide a new mechanism for the redshift of quasars.