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Twisted light, a new tool for General Relativity and beyond by Tamburini, Fabrizio; Feleppa, Fabiano; Thidé, Bo is a scholarly article available to read on EtoBox.

What is Twisted light, a new tool for General Relativity and beyond about?

We describe and present the first observational evidence that light propagating near a rotating black hole is twisted in phase and carries orbital angular momentum. The novel use of this physical observable as an additional tool for the previously known techniques of gravitational lensing allows us to directly measure, for the first time, the spin parameter of a black hole. With the additional information encoded in the orbital angular momentum, not only can we reveal the actual rotation of the compact object, but we can also use rotating black holes as probes to test General Relativity.

Author

Tamburini, Fabrizio; Feleppa, Fabiano; Thidé, Bo

Published

2021

Language

EN