logo

korean english

게시판

Home > 게시판 > 세미나

아래와 같이 콜로퀴움을 개최하오니 많이 참석해 주시기 바랍니다.

4시 20분부터 제1과학관 31214 e+강의실에서 다과를 준비하오니 많은 참석 부탁드립니다

 

아 래

 

제목: Hybrid Josephson Junctions of Various Nanostructures

 

연사: 도  용  주 교수님 (고려대학교)

 

일시: 2011년 5월 11(수) 오후4:30

 

장소: e+첨단강의실 (31214호실)

 

초록: Recent advances in nanofabrication techniques, however, have enabled the fabrication of hybrid quantum devices of superconductors and nanostructures (such as nanowires, carbon nanotube, and graphene), the Josephson coupling energy of which can be tuned electrically by the application of the gate voltage. We observed the macroscopic quantum tunnelling (MQT) of a Josephson phase particle, which exhibits a crossover from the classical to quantum regime, in a superconductor-graphene-superconductor (SGS) Josephson junction. Most importantly, the crossover temperature was controlled with the gate voltage, implying that the discrete energy level of a phase particle is also gate-tunable and a new class of quantum device such as a gate-tunable phase quantum bit (qubit) would be possible utilizing the MQT behaviour of the SGS junctions. We believe that our results demonstrate a powerful new approach in the controllability of macroscopic quantum states in a Josephson junction, and can be readily generalized for other nanostructures, including semiconductor nanowires and carbon nanotubes. Ultimately, this will be a key step toward developing a nanostructure-based superconducting qubits.

번호 제목 날짜 조회 수
공지 2022학년도 1학기 콜로퀴움 일정 2022.01.10 27512
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 971827
600 <9/17(Tue) 4:00 pm ~ >Dynamics of multiple-Q spin textures and its effect on electronic state 2019.09.10 53585
599 <Sept.11(Wed.)> Fantastic physics and materials, how to find them? 2019.09.06 59426
598 <9/2(Mon) 15:00 ~ >Status of the KM3NeT Deep Sea Neutrino Telescope 2019.08.26 57395
597 <8/30(Fri) 16:00 ~ >Structures of light neutron-rich nuclei, 17,19C 2019.08.22 55592
596 <8/26(Mon) 14:00 ~ >Constructing viable models of bouncing scenarios 2019.08.20 49103
595 <8/19(Mon) 13:30 ~ >Detection of cosmic rays in the PeV to EeV energy range file 2019.08.16 59548
594 <8/14(Wed.)>3D-strain induced superconductivity in La2CuO4+δ using a simple vertically aligned nanocomposite approach 2019.08.13 55185
593 <8/19(Mon) 14:00 ~ >Exploring topological matter in an atomic quantum simulator file 2019.07.26 57943
592 2019학년도 2학기 콜로퀴움 일정 2019.07.17 416327
591 <June.12(Wed.)> Ribocomputing: Cellular Logic Computation using RNA Devices file 2019.06.07 81704
590 <June.5(Wed.)> Fluid gravity duality 2019.05.29 50394
589 <May.22(Wed.)> Introduction to exotic quantum states in solids 2019.05.15 57549
588 <May.15(Wed.)> Three-body problems and three-body forces in Classic and Quantum Systems 2019.05.08 52956
587 <5/16(Thu.) 14:00 ~ >The Chiral anomaly without Landau levels 2019.05.08 68743
586 <May.8(Wed.)> Genesis of Matter 2019.05.01 39683
585 <May.1(Wed.)> Introduction of AMS Application 2019.04.24 47935
584 <April.17(Wed.)> Emerging Artificial Synapse for Learning- and Energy-Efficient Neuromorphic System 2019.04.11 66491
583 <April.10(Wed.)> 자성 반데르발스 물질 발견과 전망(Discovery and Perspective of magnetic van der Waals materials) 2019.04.04 43397
582 <April.3(Wed.)> 전자구조계산을 이용한 새로운 양자물질 연구 2019.03.27 42044
581 <Mar.27(Wed.)> Ultrafast Movie Maker for Photo-induced Dynamics: Ultrafast Electron Microscope 2019.03.20 72497