Fundamental physics and cosmology with LISA
Stanislav Babak, Jonathan R. Gair, Antoine Petiteau, Alberto Sesana
TL;DR
This paper reviews how the future LISA gravitational wave detector can advance fundamental physics and cosmology, including tests of General Relativity, cosmic string detection, and probing the early universe through gravitational wave backgrounds.
Contribution
It highlights new results demonstrating LISA's potential to constrain cosmological parameters via observations of coalescing massive black hole binaries.
Findings
LISA can detect gravitational wave bursts from cosmic strings.
LISA can measure a stochastic gravitational wave background.
LISA can constrain cosmological parameters using black hole binary observations.
Abstract
In this article we give a brief review of the fundamental physics that can be done with the future space-based gravitational wave detector LISA. This includes detection of gravitational wave bursts coming from cosmic strings, measuring a stochastic gravitational wave background, mapping spacetime around massive compact objects in galactic nuclei with extreme-mass-ratio inspirals and testing the predictions of General Relativity for the strong dynamical fields of inspiralling binaries. We give particular attention to new results which show the capability of LISA to constrain cosmological parameters using observations of coalescing massive Black Hole binaries.
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