This is video of a seminar I gave at the University of Sussex. Slides.
In the talk I mention an introductory colloquium on the history of black holes and the connection to entropy and information. See slides.
Has Hawking's Black Hole Information Paradox Been Resolved? Quantum Hair and Black Hole Information
Abstract: In 1976 Stephen Hawking argued that black holes cause pure states to evolve into mixed states. Put another way, quantum information that falls into a black hole does not escape in the form of radiation. Rather, it vanishes completely from our universe, thereby violating a fundamental property of quantum mechanics called unitarity. I give a pedagogical introduction to this paradox, suitable for non-experts. Then I discuss recent results concerning the quantum state of the gravitational field of a compact matter source. These results demonstrate the existence of quantum hair, violating the classical No Hair Theorems. I then discuss how this quantum hair affects Hawking radiation, allowing unitary evaporation of black holes.
See this related blog post: Has Hawking's Black Hole Information Paradox Been Resolved?
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