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Prof. Feng Liu: Fermionic analogue of black hole radiation with a high Hawking temperature (2018/10/23)

( 2018-10-22 )

题目

Fermionic analogue of black hole radiation with a high Hawking temperature

报告人

Prof. Feng Liu

Department of Materials Science & Engineering,

University of Utah, USA

时间

2018年10月23日(星期二)下午2:00

地点

微尺度国家研究中心一楼科技展厅

报告人简介

刘锋,材料物理学家,美国犹他大学材料系终身教授、系主任,美国物理学会会士(APS Fellow),物理评论快报编辑(PRL Divisional Associate Editor)。曾获德国洪堡高级研究奖,澳大利亚国际教授奖,中国基金委海外杰青奖等。刘锋教授主要从事应变薄膜纳米自主装,石墨烯,拓扑材料的基础和应用研究。已发表280多篇学术论文。另外,刘锋教授还是10多项专利的发明人。2011年,刘锋教授的团队发明了纳烯(Nanoxene)复合材料并创办了Life-E公司,目前正在开拓纳烯材料技术在电热产品中的应用。

报告摘要

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.  


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