Status | Confirmed |
Seminar Series | RENC-THEO |
Subjects | hep-th |
Date | Thursday 14 March 2019 |
Time | 10:00 |
Institute | IHP |
Seminar Room | 314 |
Speaker's Last Name | Hartong |
Speaker's First Name | Jelle |
Speaker's Email Address | |
Speaker's Institution | Edinburgh U. |
Title | Non-relativistic Gravity |
Abstract | In this talk I will discuss the expansion of general relativity in inverse powers of the speed of light. This expansion can be truncated at any desired order and, when truncated at the next- to-leading order, it can be used to derive an action principle for a diffeomorphism invariant description of non-relativistic gravity. This describes Newtonian gravity as well as strong gravity extensions thereof (e.g. due to time dilation effects). I will show how to couple such a theory to matter (point particles, scalar fields and fluids) and use this to show that the Tolman-Oppenheimer-Volkov star solution and the Friedmann equations can both be viewed as solutions to the equations of motion of matter coupled non-relativistic gravity. By looking at geodesics in a spherically symmetric background one can show that the phenomenon of perihelion precession is also described by this theory. Time permitting I will end with some comments about string and holographic extensions of these results. |
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