Fermionic Analogue of Black Hole Radiation with a High Hawking Temperature

Dr. Feng Liu
Department of Materials Science and Engineering
University of Utah

Measurement of gravitational Hawking radiation of black hole (BH) is prohibitive because of an extremely low Hawking temperature (TH). Efforts have been devoted to creating artificial BHs with a higher TH but having rather limited success. In this talk, I will discuss our recent theoretical studies demonstrating a fermionic analog of BH with a high TH ~ 3 K. We show that Floquet-Dirac states, formed in a periodically laser driven black phosphorous thin film, can be designed with a spatial gradient to mimic the “gravity” felt by fermionic quasiparticles as that for a Schwarzschild BH (SBH). Quantum tunneling of electrons from a type-II Dirac cone (inside BH) to a type-I Dirac cone (outside) emits a SBH-like Hawking radiation spectrum. This work provides a laboratory design of fermionic BH and a condensed-matter analogue to study fascinating astrophysical phenomena.