korean english


Home > 게시판 > 세미나

위상양자물성 연구실에서 National High Magnetic Field Laboratory 이경민 박사님을 초청하여 아래와 같이 세미나를 개최합니다.

학과 구성원 여러분의 많은 참석을 부탁 드립니다.

온-오프 혼합으로 진행되는 세미나입니다.


Title: Frustration-induced Athermal Behaviors: Hilbert Space Fragmentation and Quantum Many-Body Scars

Speaker: 이  경  민  박사님 (National High Magnetic Field Laboratory)

Date/time: 2021. 6. 1 (Tue.) 16:30

○ 온라인 참여방법: https://meet64.webex.com/meet/pr1829909900

○ Place: Natural Science 1,  Room No. 31317

Abstract: Although most interacting quantum systems thermalize locally on short time scales independent of initial conditions, recent developments have shown that this is not always the case: Athermal behaviors have been observed in disordered systems, and more recently, evidence for athermal eigenstates, known as quantum many-body scars, has emerged in disorder-free models with constrained dynamics. In this talk, I will demonstrate that geometric frustration provides a pathway to athermal behaviors without disorder. In a clean system, local constraints can lead to a fragmented Hilbert space where certain initial states fail to reach the thermal steady state. Such fragmentation naturally arises in many frustrated systems with low-energy “ice manifolds” which gives rise to a broad range of relaxation times for different initial states. Focusing on the highly frustrated kagome lattice, I will discuss the phenomenology of fragmentation in two spin-1/2 Hamiltonians with simple two-body interactions: the Balents-Fisher-Girvin model (easy-axis regime), and the three-coloring model (easy-plane regime), both with constrained Hilbert spaces. Furthermore, I will discuss the existence of quantum many-body scar eigenstates in modified three-coloring models with robust quantum revivals, which can be generalized to other lattices.

번호 제목 날짜 조회 수
공지 2022학년도 1학기 콜로퀴움 일정 2022.01.10 2693
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 814331
667 2019학년도 2학기 콜로퀴움 일정 2019.07.17 405749
666 2020학년도 1학기 콜로퀴움 일정 2020.01.31 243336
665 2017학년도 1학기 콜로퀴움 일정 2017.01.05 194040
664 <12/3> Magnetic couplings, optical spectra, and spin-orbit exciton in 5d Mott insulator Sr2IrO4 2012.11.26 183616
663 <5/16(토)> 세미나 개최 안내 2015.05.18 143515
662 2016학년도 1학기 콜로퀴움 일정 2016.02.03 127971
661 2020학년도 2학기 콜로퀴움 일정 2020.07.16 123018
660 <4/2> Radio Detection of Ultra High Energy Cosmic Rays and Neutrinos in Antarctica 2014.03.26 115431
659 2019학년도 1학기 콜로퀴움 일정 2019.01.08 114873
658 2018학년도 2학기 콜로퀴움 일정 2018.07.03 111865
657 <11/7> On-Film Formation of Bi Nanowires with Extraordinary Electron Mobility 2008.11.03 107665
656 2021학년도 1학기 콜로퀴움 일정 2021.01.13 107225
655 <11/11>Leptogenesis in triplet seesaw models 2006.11.08 105181
654 <5/26>BK21 물리연구단 석학초빙 특별 세미나 2010.05.17 104461
653 2018학년도 1학기 콜로퀴움 일정 2018.01.03 104290
652 <12/3> Characteristic of risk asset in financial market. 2010.11.29 103974
651 2017학년도 2학기 콜로퀴움 일정 2017.07.04 101420
650 2014학년도 2학기 콜로퀴움 일정 2014.09.11 101016
649 <3/13> Probing hidden magnetism and quantum criticality in unconventional superconductors 2009.03.06 99700