IntPDF
Academy
Get started

A Review of Gravitational Memory and BMS Frame Fixing in Numerical Relativity

Gravitational memory effects and the BMS freedoms exhibited at future nullinfinity have recently been resolved and utilized in numerical relativitysimulations. With this, gravitational wave models and our understanding of thefundamental nature of general relativity have been vastly improved. In thispaper, we review the history and intuition behind memory effects and BMSsymmetries, how they manifest in gravitational waves, and how controlling theinfinite number of BMS freedoms of numerical relativity simulations cancrucially improve the waveform models that are used by gravitational wavedetectors. We reiterate the fact that, with memory effects and BMS symmetries,not only can these next-generation numerical waveforms be used to observenever-before-seen physics, but they can also be used to test GR and learn newastrophysical information about our universe.

Further reading

Prev
Stop Explaining Black Box Machine Learning Models for High Stakes Decisions and Use Interpretable Models Instead
Next
Slow and Steady Wins the Race: Maintaining Plasticity with Hare and Tortoise Networks