Many predictions of new phenomena given by strong field quantum electrodynamics (SFQED) will be tested on next BLADDER generation multi-petawatt laser facilities in the near future.These new phenomena are basis to understand physics in extremely strong electromagnetic fields therefore have attracted wide research interest.Here we discuss a new SFQED phenomenon that is named as vacuum radiation.In vacuum radiation, a virtual electron loop obtain energy from time dependent external electric field and radiate an entangled photon pair.
Features of Grill Door Hinge Spring vacuum radiation in a locally time dependent electric field including spectrum, characteristic temperature, production rate and power are given.