visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2020-10-15 17:00 
연사  
장소 https://bit.ly/3ndIiJn 
제목 : Time crystals, quasicrystals, and time crystal dynamics in the superfluid universe
 
연사 : Dr. Samuli Autti
일시 : 5:00pm, October 15, 2020
 
초록 : Time crystals are a novel phase of condensed matter, characterised by continuous, repeating motion in their quantum ground state. In our experiments, we explore this new phase using magnetic quasiparticles in the superfluid universe of 3He: We observe the formation of a quantum time quasicrystal and its transformation to a superfluid time crystal – a time supersolid [1]. We then bring two superfluid time crystals to touch each other, and observe oscillating particle exchange between the time crystals – the AC Josephson effect [2]. These ground-breaking experiments substantiate the theoretical excursion started by F. Wilczek, and provide novel, magnetic building block for quantum devices and quantum information processing – potentially even at room temperature [3].
 
[1] S. Autti et al, PRL 120 (2018)
[2] S. Autti et al, Nature Materials (2020), https://doi.org/10.1038/s41563-020-0780-y 
[3] Kreil, A. J. E. et al. arXiv:1911.07802 (2019)
 
고맙습니다.
 
최형순 드림

 

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)
494 2017-03-21 16:00    Spring 2017: Physics Seminar Serises file
493 2017-03-24 14:30    Topological Dynamics
492 2017-03-24 16:00    Graphene based nano electronics and nano electromechanics; focusing on precise control of nano structures for studying accurate physical properties
491 2017-04-05 12:00    2017년 4월 첫수 융합포럼 개최 안내(물리학과 & 원자력 및 양자공학과 공동 개최)/The First Wednesday Multidisciplinary Forum in April 2017 organized by Dept. of Physics & Dept. of Nuclear & Quantum Engineering file
490 2017-04-06 16:00    For whom the Belle tolls
489 2017-04-27 16:00    반도체 양자점을 이용한 단광자 광원
488 2017-04-28 14:30    Hot electron generation at surfaces and its impact to catalysis and renewable energy conversion
487 2017-04-28 16:00    Carbon nanotubes coupled to superconducting impedance matching circuits
486 2017-05-12 13:30    Topological Dirac insulator
485 2017-06-02 14:30    Quasiparticle Interference and Fourier transform scanning tunneling spectroscopy in WTe2 (Weyl semimetal) file
484 2017-06-02 16:00    Maxwell's demon in quantum wonderland file
483 2017-07-10 16:00    “Intertwined Orders in a Heavy-fermion metal” file
482 2017-07-14 15:00    Chiral anomaly in disordered Weyl semimetals file
481 2017-08-16 16:00    Phonon-driven spin-Floquet valleytro-magnetism file
480 2017-08-31 14:00    “Berry phase and nonlinear response: photocurrent in noncentrosymmetric insulators and Weyl semimetals” file
479 2017-09-12 16:00    Exact Solution for the Interacting Kitaev Chain at Symmetric Point file
478 2017-09-13 16:00    An Introduction to Quantum Spin Liquids file
477 2017-09-22 13:00    Superconductor-metal-insulator transition in thin Tantalum films file
476 2017-09-22 14:30    Quantum Electronic Transport in Graphene Hybrid Nanostructures file
475 2017-09-22 16:00    Unexpected Electron-Pairing in Integer Quantum Hall Effect file