Conserved charges in gravity and entropy
- December 10 at 13:00 - 14:30, 2020 (JST)
- Dr. Shinya Aoki (Professor, Yukawa Institute for Theoretical Physics, Kyoto University) Edit
- via Zoom
We propose a manifestly covariant definition of a conserved charge in gravity. We first define a charge density from the energy momentum tensor with a Killing vector, if exists in the system, and calculate the energy (and angular momentum) of the black hole by a volume integral. Our definition of energy leads to a correction of the known mass formula of a compact star, which includes the gravitational interaction energy and is shown to be 68\% of the leading term in some case. Secondly we propose a new method to define a conserved charge in the absence of Killing vectors, and argue that the conserved charge can be regarded as entropy, by showing the 1st law of thermodynamic for a special case. We apply this new definition to the expanding universe, gravitational plane waves and the black hole. We discuss future directions of our research.
If you would like to participate, please register using the form below.