Towards the path integral for gravity

開始日時 2021/08/03 16:00
終了日時 2021/08/03 17:00
講演者 Prof. Neil Turok( The University of Edinburgh )
会場 Online (Zoom)
言語 English


We show how Feynman’s path integral for quantum mechanical theories may be defined without a Wick rotation to imaginary time. Instead, we employ analytic continuation (and Cauchy’s theorem) in the complexified space of paths being integrated over. We outline a new existence proof for real time path integrals and describe physical applications, from nonrelativistic quantum mechanics to interference patterns in radio astronomy and caustics in Yang-Mills theories. Our target is gravity: I outline the remaining challenges.