KEK 素粒子原子核研究所・理論セミナー（松尾善典氏)

 
カテゴリ理論セミナー
開始2019/05/28（火）11:00
終了2019/05/28（火）12:00
会場研究本館1階　第1会議室
講演タイトルVacuum energy and apparent horizon
講演者松尾善典氏（大阪大学・特任助教）
言語英語/English
連絡先石田裕之／ishidah-AT-post.kek.jp
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概要

Effects of the negative vacuum energy plays a crucial role in a small neighborhood of the apparent horizon of evaporating black holes. We consider spherically symmetric configurations in which the collapsing star has already collapsed below the Schwarzschild radius. For static case, there are no divergences around the Schwarzschild radius even in the Boulware vacuum, if the back reaction from the negative vacuum energy is taken into account. The geometry around the Schwarzschild radius is modified by the effect of vacuum energy and has no event horizon. Instead, there is a local minimum in the radius, like the geometry around the neck of the wormhole. The local minimum of the radius becomes the apparent horizon when the black hole is evaporating by the Hawking radiation. Information can get away from the apparent horizon since it is time-like because of the negative vacuum energy.

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