region. Accretion onto the polar cap is thus impossible with such an outflow.

### Mass ejection

We have shown that accretion is almost impossible for a pulsar after its birth. The question now is whether strong accretion is possible during the supernova explosion. It is known that a new born neutron star is very hot (the core temperature $T_{\rm c} \sim 10^{11}$K), and the mass ejected from such a hot neutron star during the first 10s is about $\sim
10^{-3} - 10^{-2} M_\odot$[@woosley]. It is expected that a hot new born strange star should also have such a high mass ejection rate, so that its surface is almost bare, since the ejected mass is considerably larger than the maximum crust mass of the strange star[@usov97; @usov98]. As discussed in section 2.1, the rate of energy release when forming a strange star is $\sim 10^{53}$erg/s. Most of this energy is carried away by neutrinos, but part of it will be converted to electromagnetic radiation. A nuclei above the quark surface will feel strong outward pressure by photons and neutrinos (note that the Eddington luminosity is only $\sim 10^{38}$erg/s), therefore normal nuclei can hardly remain being bound by the gravitational force above 