Gravitational Waves from Phase-Transition Induced Collapses of Neutron Stars

We study the gravitational wave signals emitted from phase-transition induced collapses of rapidly rotating neutron stars to strange stars by performing 3D numerical simulations. Our preliminary results suggest that the complete conversion of neutron stars to strange stars would occur within a fraction of millisecond. We also find that the gravitational waves generated from the collapse process may be detectable by the advanced LIGO for reasonable source distance. In addition, the study such gravitational wave signals would put useful constraint on the parameters of QCD.