Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Status Confirmed
Seminar Series RENC-THEO
Subjects hep-th
Date Thursday 30 November 2017
Time 10:00
Institute IHP
Seminar Room 314
Speaker's Last Name Reall
Speaker's First Name Harvey
Speaker's Email Address
Speaker's Institution DAMTP, Cambridge, UK
Title On the well-posedness of Lovelock and Horndeski theories of gravity
Abstract Lovelock theories are the most general theories of a metric tensor with second order equations of motion. Horndeski theories are the most general four-dimensional theories of a metric tensor and a scalar field with second order equations of motion. Many hundreds of papers have been written about these theories. But it is unknown whether they satisfy a basic consistency requirement, namely well-posedness of the initial value problem. I will discuss this problem and explain why the method used to establish well-posedness of the Einstein equation fails for Lovelock theories and the most general Horndeski theories.
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