110.DYNAMICS OF FALSE VACUUM BUBBLE IN VAIDYA SPACETIME : Creation of a child universe in Vaidya spacetime with outgoing negative energy radiation

This science report is based on a cooperative study with T. Mishima (Nihon University) and N. Yoshino (Tokyo Institute of Technology). The relativistic dynamics of a domain wall in a radiation fluid is studied. As one of applications, we demonstrate an interesting model in which a false vacuum bubble, in the case of a certain kind of surface stress-energy tensor, expands monotonically and at the same time can create a child universe