One of the major predictions of Einstein’s general relativity is gravitational lensing, the deflection or amplification of light by mass distributions. In my talk, I focus on gravitational wave lensing in wave optics (very long wavelength), as opposed to the standard geometric optics. I show how a supermassive black hole acts as a wave optics lens, for triple systems in in the regime of the LISA mission. Keeping track of the tensorial structure of the signal, the lensing process shows rich physical features in wave optics, such as non-preservation of the GW helicity and polarization content. This makes black holes a particularly interesting gravitational lens that may be probed in the next decades.

========
Join Zoom Meeting
https://u-paris.zoom.us/j/89154692428?pwd=UFo5RVNvNFhEb2RSc1Fic3A0SzBBZz09
Meeting ID: 891 5469 2428
Passcode: 999118