Group Meetings
Published by admin on Monday, March 1, 2010
The Gravity Group at UMississippi has a regular weekly scheduled meeting throughout the year to discuss current research progress, topics of interest and new papers. Typically, each week, two members of the group each make a short presentation, either about their current area of research or a paper that has attracted their interest.
For Spring semester 2025, the Group meets on Mondays at 4-5PM for a research update, both a scheduled ca. half hour presentation and room for free-form updates, and on Wednesdays at 4-5PM for a journal club. The schedule of speakers for this period is:
Group Meeting Schedule(*subject to change)
| Date | Research Presentation | Paper Presentation |
|---|---|---|
| Jan 27 & Jan 29 | arXiv discussion | Round-table update |
| Feb 3 & Feb 5 | Aniket | Amitesh |
| Feb 10 & Feb 12 | arXiv discussion | Nauman (research) |
| Feb 17 & Feb 19 | Purnima | Dipika |
| Feb 24 & Feb 26 | Subhayu | Arindam |
| Mar 3 & Mar 5 | Amitesh | APS practice |
| Mar 10 & Mar 12 | [SPRING | BREAK] |
| Mar 17 & Mar 19 | [APS | MEETING] |
| Mar 24 & Mar 26 | Nathan | Seminar |
| Mar 31 & Apr 2 | Aniket (paper) | Purnima |
| Apr 7 & Apr 9 | Arindam | GCGM prep |
| Apr 14 & Apr 16 | Nauman (paper) | Seminar |
| Apr 21 & Apr 23 | James | Nathan |
| Apr 28 & Apr 30 | Seminar | Seminar |
The group also has a running series where an external speaker is invited to give seminar talk during one of the usual meetings on their area of research or any topic of interest. The seminar then replaces the usual format of the meetings on those days. The list of external speakers will be updated as time goes on.
Tentative List of Seminars(*subject to change)
| Date | Speaker | Affiliation | Title of talk |
|---|---|---|---|
| March 26 | Raj Patil | AEI Potsdam | Precision Gravity: Gravitational waves using Feynman diagrams |
| April 16 | Konstantinos Kritos | Johns Hopkins | TBA |
| April 28 | Patrick Dawson | University of Sydney | TBA |
| April 30 | Macarena Lagos | UNAB | TBA |
The next scheduled seminar speaker is Raj Patil.
Title: Precision Gravity: Gravitational waves using Feynman diagrams
Abstract: Observations of gravitational waves (GW) have the potential to unravel the mysteries of cosmic origins, constrain the equations of state of compact objects, and serve as a test of general relativity. To achieve these scientific goals, it is crucial to develop highly precise and accurate waveform templates to minimize systematic errors. My talk will focus on computing state-of-the-art effective two-body Hamiltonians and fluxes using techniques from quantum field theory and scattering amplitudes. These Hamiltonians and fluxes serve as fundamental building blocks for waveform templates, and dictate the accuracy of the waveform model.In particular, I will describe the effects of spinning and tidally deformed compact objects on evolution of the binary system. I will present computations of the linear-in-spin Hamiltonian, which captures the interaction between the binary’s orbital angular momentum and the spin of one constituent at 4.5PN order, as well as the quadratic-in-spin Hamiltonian, which describes spin-spin coupling at 5PN order. Furthermore, I will describe oscillation modes of neutron stars (NS) induced by tidal interactions, particularly the fundamental-mode dynamical tides, which are expected to play a crucial role in constraining the NS equation of state in upcoming GW observing runs. I will discuss the computation of fluxes up to 2PN for adiabatic tidal interactions and effective Hamiltonians up to 3PN for both dynamic and adiabatic tidal interactions. The latter is particularly interesting as it requires introducing counterterms to remove divergences, leading to a renormalization group flow of the post-adiabatic Love number.
The archive of previous seminars is here.
Note: Due to the current COVID-19 situation, the meetings have shifted to a hybrid format. This format will be followed until otherwise announced. In case one wishes to participate, please direct your queries to either Dr. Leo Stein <lcstein@olemiss.edu> or Dr. Anuradha Gupta <agupta1@olemiss.edu>.