Black and White Holes at Material Junctions

by Yaron Kedem

Thursday 6 Feb 2020, 13:15 → 14:00 Europe/Stockholm

A5:1041 (Cops seminar room)

Electrons in a certain material, namely Type II Weyl semimetals, display one-way propagation, which supports totally reflecting behavior at an endpoint, as one has for black hole horizons viewed from the inside. Junctions of Type I, where propagation is two-way, and Type II lead to equations identical to what one has near black-, or white, hole horizons, but the physical implications, we suggest, are  quite different from expectations which are conventional in that context. In particular, there is not Hawking radiation. The physical picture can seem paradoxical at first look but we will show that it is reasonable nonetheless and does not lead to any contradictions[1].

[1] YK,  E. J. Bergholtz and F. Wilczek, arXiv: 2001.02625