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Dilatonic Wormholes and Black Holes
Sean A. Hayward,김성원,Hyunjoo Lee 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.42 No.III
The CGHS two-dimensional dilaton gravity model is generalized to include a ghost Klein-Gordon field, {\it i.e.}\ with negative gravitational coupling. This exotic radiation supports the existence of static traversible wormhole solutions, analogous to Morris-Thorne wormholes. Since the field equations are explicitly integrable, concrete examples can be given of various dynamic wormhole processes. In particular, if the ghost radiation supporting the wormhole is turned off and allowed to disperse, the wormhole collapses into a black hole. The dynamic stability of the wormhole is demonstrated by sending a pulse of radiation through it, forming a non-static wormhole, followed by a pulse of exotic radiation which returns it to a different static state.
Sean A. Hayward 한국물리학회 2010 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.57 No.31
Various refinements of trapped surfaces, intended to apply near the outer horizon of a black hole, and their relations are summarized. Assuming the null energy condition, minimal trapped implies outer trapped, which implies increasingly trapped. Variations of these three definitions form an interwoven hierarchy.