visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Weiss fields for Quantum Spin Dynamics

2022.03.28 16:20

admin 조회 수:3973

날짜 2022-03-31 10:00 
연사  
장소 E6 #1501/zoom 
Title: Weiss fields for Quantum Spin Dynamics
presenter Dr. Samuel Begg (APCTP) 
Date: 10AM, 31th Mar. E6 #1501/zoom
       

https://us02web.zoom.us/j/86848081459?pwd=ai8rWSt2ZWxFeDNtZ09PVFgzNU1jZz09

회의 ID: 868 4808 1459

암호: 076668

 
abstract

Simulating non-equilibrium quantum spin dynamics beyond one-dimension remains a significant challenge, despite advances in computational methods over the last two decades. We tackle this issue using a Monte Carlo method in which the time-evolution of  quantum observables is encoded by averages over a classical stochastic process. An intuitive approach is to sample around a "well-chosen" mean-field spin configuration. This works only for relatively short timescales, with entanglement growth generically requiring that these mean-fields decay over time. New insights are therefore required to reach later times. We demonstrate that in our stochastic representation one may encode mean-field contributions for every trajectory individually. This improves the efficiency of Monte Carlo sampling exponentially for quenches of the quantum Ising model in 2D and 3D. Connections to gauge freedom in phase space representations of quantum problems are also discussed, with emphasis placed on current and future research directions

번호 날짜 연사 제목
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
466 2015-12-17 11:00    Wavefront engineering for in-vivo Deep brain imaging
465 2022-12-20 16:00    Studying Baryonic Flow Across the Cosmic Scales Using Radio and Millimeter Wavelength Experiments
464 2016-10-18 15:00    “Hybrid quantum systems with mechanical oscillators”
463 2016-07-08 14:00    Electronic quasiparticles in the quantum dimer model
462 2015-11-24 16:00    Topology-based understanding of spin dynamics in inhomogeneously magnetized systems
461 2022-04-01 16:00    High-field Electron Transport and Interaction Induced Phenomena in 2D Materials file
460 2018-11-29 16:00    양자 칸델라 실현을 위한 단일 광자 발생장치 개발 file
459 2024-03-07 16:00    [CAPP seminars] Development of Superconducting Transition Edge Sensors at SRON file
458 2021-06-11 16:00    Pseudogap in surface-doped black phosphorus file
457 2016-11-11 13:30    Bandgap Engineering of Black Phosphorus
456 2016-04-01 14:30    Interference of single charged particles without a loop and dynamic nonlocality
455 2016-05-31 16:00    Understanding 3D tokamak physics towards advanced control of toroidal plasma
454 2023-07-18 11:00    Non-Hermitian Casimir Effect of Magnons
453 2024-06-13 16:00    Magnonic $\varphi$ Josephson junction and its non-Hermitian Josephson diode effect
452 2023-09-14 16:00    [CAPP seminar] Dark matter searches in Water Cherenkov Detectors file
451 2018-05-11 14:30    Disordered Floquet topological insulators file
450 2016-12-09 16:00    Shift Charge and Spin Photocurrents in Dirac Surface States of Topological Insulator
449 2022-05-13 14:30    Topological Superconducting Spintronics Towards Zero-Power Computing Technologies file
448 2021-07-29 14:00    Gravitationally Induced Dark Sector and Inflationary Dynamics file
447 2015-12-11 13:30    Quantum spin liquid in the 1/3 depleted triangular lattice Ba3(Ru1-xIrx)Ti2O9