Prof. Prasenjit Saha

The sharpest images in astronomy (in the sense of angular resolution) are all at radio wavelengths --- most famously the black hole shadows reconstructed from the Event Horizon Telescope. Can comparable angular resolution be achieved at optical wavelengths? This talk will draw attention to several recent research groups who are attempting just that. The key is to exploit a quantum-optical phenomenon known as the Hanbury Brown & Twiss (HBT) effect. Most of the science cases for imaging at the sub-nanoradian scales are stellar astrophysics, but there are more exotic potential target too…