String Theory Seminars
A Neumann Boundary for Gravity (The Quantum Spacetime Seminar Series)
by Dr. Chethan Krishnan (Centre for High Energy Physics, Indian Institute of Science, Bangalore)
Monday, March 19, 2018 from to (Asia/Kolkata)
It was more than 40 years ago that a general Dirichlet boundary term was written down for general relativity by Brown and by Gibbons-Hawking. But a general Neumann boundary term seems to have never been constructed. We will argue that a natural way to do this is to covariantize the Neumann problem. When one does this, a Neumann boundary term emerges effortlessly. We will discuss a list of closely related ideas that arise naturally from Neumann, some in AdS and some in flat space.