logo

korean english

게시판

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 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1056398
662 <Nov. 3(Wed.)>시공간의 구조: 상대성이론, 특이점, 우주상수 2021.10.28 8836
661 <April 21(Wed.)> 우주배경복사 편광 관측 - 남극점 기지 바이셉/켁 어레이(BICEP/Keck Array) 망원경 2021.04.12 9668
660 <April 28(Wed.)> 손에 잡히는 AI 2021.04.21 10147
659 <Dec.9(Wed.)>한국형 암흑물질 실험 2020.12.02 15174
658 <Oct.14(Wed.)>New Ways to Search for the Dark World 2020.10.12 15602
657 <Sep.23(Wed.)>나는 내 마음이야 2020.09.16 16343
656 <Sep. 8(Wed.)> Utilizing physics to build a trapped-ion quantum computer 2021.09.01 17337
655 <Sep.16(Wed.)>Artificial Crystal 2020.09.14 19298
654 <May 12(Wed.)> Nanomechanical oscillators for quantum technology 2021.05.06 20282
653 <July 21(Wed.)> Strongly Correlative Ionics 2021.07.19 20619
652 <Aug. 6(Fru.)> Gravitationally probing dark matter (DM) microphysics 2021.08.03 25588
651 <Mar.17(Wed.)> Glue spectrum for superconductivity obtained via optical spectroscopy 2021.03.10 26171
650 <June 23(Wed.)>Valley Polarization and Exciton Hall Effect in Transition Metal Dichalcogenides 2021.06.22 26439
649 <Nov.11(Wed.)>Nonlinear optics to study charge, spin, and crystalline structures 2020.11.04 28802
648 <8/1(Sat.)> Recent Advances in Deep Learning 2020.07.29 30486
647 <Oct. 27(Wed.)> How interactions shape ecological communities 2021.10.20 31756
646 <Oct. 13(Wed.)> Electric Quantum Oscillation: A New Form of Quantum Oscillation 2021.10.06 35085
645 <Nov. 5(Fri.)>Strongly Coupled Moire Photonics 2021.11.01 35521
644 <Nov.13(Wed.)>The Science of Quark-Gluon Plasma 2019.11.06 35768
643 <July 14(Wed.)> B1g phonon anomaly driven by Fermi surface instability at intermediate temperature in YBa2Cu3O7−δ 2021.07.13 36149