visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2022-09-23 11:00 
연사  
장소 E6-2 #1323 
세미나 영상은 아래 링크로 확인하시기 바랍니다. (공개기한: 2023.09.22.까지)
 
o Date / Time : Sep. 23.  2022, 11:00 AM
o Place : Room 1323, KAIST Natural Sciences Lecture Hall(E6) (자연과학동 1323호)
o Zoom Link : https://kaist.zoom.us/j/86450686082   회의 ID: 864 5068 6082
 
Speaker : Prof. Gil-Ho Lee (Department of Physics, Pohang University)
Talk Title :  Steady Floquet–Andreev states in graphene Josephson junctions
Abstract
Engineering quantum states through light-matter interaction has created a new paradigm in condensed matter physics. A representative example is the Floquet-Bloch state, which is generated by time-periodically driving the Bloch wavefunctions in crystals. Previous attempts to realise such states in condensed matter systems have been limited by the transient nature of the Floquet states produced by optical pulses, which masks the universal properties of non-equilibrium physics. Here, we report the generation of steady Floquet Andreev (F-A) states in graphene Josephson junctions by continuous microwave application and direct measurement of their spectra by superconducting tunnelling spectroscopy [1]. We present quantitative analysis of the spectral characteristics of the F-A states while varying the phase difference of superconductors, temperature, microwave frequency and power. The oscillations of the F-A state spectrum with phase difference agreed with our theoretical calculations. Moreover, we confirmed the steady nature of the F-A states by establishing a sum rule of tunnelling conductance, and analysed the spectral density of Floquet states depending on Floquet interaction strength. This study provides a basis for understanding and engineering non-equilibrium quantum states in nano-devices.
Attached: C.V
 
Inquiry: Prof. Se Kwon Kim(sekwonkim@kaist.ac.kr) / Prof. Hee Jun Yang (h.yang@kaist.ac.kr)
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)
286 2023-06-22 16:00    [High Energy Physics Seminar] The Branes Behind Generalized Symmetry Operators
285 2019-01-23 16:00    Ultrasensitive Microwave Bolometer: Opportunity for Axion Detectors file
284 2022-04-13 10:30    Harnessing topology and correlations from singularities in 3d-kagome metals
283 2024-05-08 16:30    [High Energy Theory Seminar] Black Holes from Heavy Operators in N=4 SYM
282 2023-08-23 16:00    [High Energy Theory Seminar] A spacetime tensor network for AdS3/CFT2
281 2023-01-09 16:00    Non-Hermitian Hopf-bundle Matter. Moon Jip Park (IBS-PCS)
280 2025-05-13 16:00  Mr. Heonjoon Park(Univ. Washington, USA)  Fractional Quantum Anomalous Hall Effect file
279 2020-12-11 14:30    Antisymmetric interlayer exchange coupling in magnetic multilayers
278 2024-01-24 15:00    Determination of single molecule loading rate during mechanotransduction file
277 2020-11-26 16:00    2020 가을학기 광학분야 특별세미나(Light Engineering Beyond the Diffraction Limit)
276 2024-04-11 16:00    Theoretical Studies of the Electric Field Induced Thermal Hall Effect in the Quantum Dimer Magnets XCuCl3 (X = Tl, K)
275 2016-10-17 11:00    IMS and examples of the studies on optoelectronic materials
274 2019-08-19 10:00    Tutorials on Multimode Quantum Optics in the Continuous Variable Regime file
273 2022-09-21 10:30    [Update 세미나 영상] Distinguished Lecture 'The Magic of Moiré Quantum Matter' Prof. Pablo Jarillo-Herrero(Department of Physics, MIT) file
272 2022-08-08 14:00    Classical Shadow Tomography for Analog Quantum Simulators
271 2025-04-21 16:00  Prof. Ambrose Sungseok Seo (Univ of Kentucky)  Condensed matter physics? All you gotta do is just meet me at the ... file
270 2020-12-09 10:00    Searching for the QCD axion with the ARIADNE experiment file
269 2019-08-22 16:00    Physics and Applications in Nanoelectronics and Nonomechanics file
268 2024-05-28 11:00    동적평균장 이론 소개
267 2022-03-25 11:00    (응집물리 세미나) Hund's metallicity in ruthenate systems file