korean english


Home > 게시판 > 세미나

다체계이론연구실과 고체전자구조계산연구실에서 University of Maryland의 김준현 박사님을 초청하여 아래와 같이 세미나를 개최합니다.

학과 구성원 여러분의 많은 참석을 부탁 드립니다.


Date/time: 2019. 05. 16(Thu.) 14:00


Place: 기초과학연구소 세미나실(31317)


Speaker: 김  준  현  박사님 (University of Maryland)


Title: The Chiral anomaly without Landau levels


Abstract:  We study the chiral anomaly in disordered Weyl semimetals, where the broken translational symmetry prevents the direct application of Nielsen and Ninomiya’s mechanism. In the weak disorder regime, there exists rare regions of the random potential where the disorder strength is locally strong, which gives rise to quasi-localized resonances and their effect on the chiral anomaly is unknown. We numerically show that these resonant states do not affect the chiral anomaly only in the case of a single Weyl node. At energies away from the Weyl point, or with strong disorder where one is deep in the diffusive regime, the chiral Landau level itself is not well defined and the semiclassical treatment is not justified. In this limit, we analytically use the supersymmetry method and find that the Chern-Simons term in the effective action which is not present in non-topological systems gives rise to a non-zero average level velocity which implies chiral charge pumping. We numerically establish that the non-zero average level velocity serves as an indicator of the chiral anomaly in the diffusive limit.

번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1089719
616 <Oct. 11(Wed.) 4:30 PM> Graphene Membrane for Imaging Molecular Assembly and Dynamics 2017.09.27 51467
615 <April. 12 (Wed.) 4:30 PM>디랙물질을 통해서 본 강상관 계의 양자 홀로그래피적 조명: 2017.04.05 51767
614 2022학년도 1학기 콜로퀴움 일정 2022.01.10 51767
613 <June 7(Wed.) 4:30 PM> 물리학으로 보는 인간과 사회 2017.05.31 51817
612 <9/24(Tue) 4:00 pm ~ > Structure Formation with Two Periods of Inflation: Beyond plain LCDM 2019.09.17 51939
611 <May 31(Wed.) 4:30 PM>중력파, 새로운 천문학과 물리학의 시작 2017.05.24 52263
610 <May 24(Wed.) 4:30 PM>누구나 과학을 통찰하는 법 2017.05.17 52701
609 <Dec.11(Wed.)>데이터 과학으로서의 물리학. 그리고 금융투자업 2019.12.04 53900
608 <April 25(Mon) 16:30> Neutron Recoil Polarization in Low‐energy Photodisintegration of the Deuteron 2016.04.25 54164
607 <June 1(Wed.) 4:30 PM> 중력으로 강한 핵력 이해하기 2016.05.26 54345
606 <May. 18(Wed.) 4:30 PM> Search for Hidden Neutrinos at the High Energy Frontier 2016.05.23 54659
605 <Mar. 15(Wed.) 4:30 PM>반도체 Fab Process와 물리학 전공자 2017.03.14 54704
604 <Nov. 9(Wed.) 4:30 PM> 20-nm resolution imaging of brain circuitry by next-generation expansion microscopy 2016.11.02 54705
603 <Dec. 14(Wed.) 4:30 PM>중력과 양자 얽힘 (tentative) 2016.12.07 54837
602 <Oct. 18(Wed.) 4:30 PM> AlGaN/GaN HEMT 센서플랫폼 (KANCSensGaNTM) 기술 소개 file 2017.10.11 54851
601 <May. 4(Wed.) 4:30 PM> 플라즈마를 이용한 표면처리 기술 2016.04.27 54902
600 <April. 27(Wed.) 4:30 PM> 로봇과 함께 살아갈 미래 2016.04.22 55071
599 <6/21(Thu.) ~ 22(Fri.)>Mini-workshop for the entanglement entropy at SKKU 2018.06.18 55406
598 <June 8(Wed.) 4:30 PM> 세계와 우리나라 우주개발 도전 2016.06.01 55825
597 <7/11(Wed.) 3:00pm> Traversable wormholes: two-dimensional example 2018.07.09 55965