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 1090361
58 <1/22>Vortices, Q-balls, domain walls on dielectric M2 brane 2009.01.19 83128
57 <1/14>Dark Matter signals from PAMELA and ATIC 2009.01.12 91068
56 <1/8>Supersymmetric states in AdS/CFT 2009.01.05 109969
55 <11/27> N=4,5,6,8 superconformal Chern-Simons theory 2008.11.25 80607
54 <11/14> Resonance collective mode in novel superconductors 2008.11.11 101702
53 <10/14> Applications of holographic QCD 2008.10.13 84710
52 <7/2> Dyonic Instanton and Its Higgs Structures 2008.07.01 73578
51 <7/3> Complex networks and the graph structure of metabolism 2008.06.26 107182
50 <6/26> Hawking radiation and divergence anomalies 2008.06.26 114267
49 <6/10> Traffic Problem in Physics and Its Application 2008.06.10 91970
48 <5/19> High Energy Physics and The Gas Electron Multiplier Detector Technology 2008.05.15 87050
47 <5/15>Black Hole Entropy Function in (Anti-)de Sitter Space-Time 2008.05.09 125837
46 <5/1> Schwinger Pair Production in dS_2 and AdS_2 2008.04.29 84932
45 <2/11>Marginal Deformations For Lower Dimensional D-bran... 2008.02.05 94336
44 <1/17>Quantum criticality and superconductivity 2008.01.16 90474
43 <9/10> Nanomaterials for Biotech Applicastions 2007.09.05 88446
42 <9/13> Multiferroic properties of BiFeO3 single crystal and 1D-Chain system 2007.09.04 83249
41 <5/18> Baryons in AdS/QCD 2007.05.15 108944
40 <5/15>Do we live in 5D? 2007.05.15 84873
39 <3/30> Abelian Decomposition of Gravitation 2007.03.29 83620