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 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1091493
» <5/11> Hybrid Josephson Junctions of Various Nanostructures 2011.05.04 104932
275 <5/18> Three magics to hold an atom without perturbation 2011.05.09 101465
274 <5/25> 나노켈빈 원자 기체의 보즈-아인슈타인 응집 2011.05.18 85563
273 <6/1> Electron phonon coupling effect in 4d transition metal oxide magnetism 2011.05.26 107207
272 <6/8> 액체금속 및 물의 과냉각 현상과 국소구조와의 관계 : 정전기 공중부양 기술 및 dynamic diamond anvil cell 2011.06.07 112572
271 2011학년도 2학기 콜로퀴움 일정 안내 2011.08.22 89487
270 <9/7> 과학과 예술 (Science and Arts) 2011.08.30 81497
269 <9/21> Electronic phase transition in low dimensional SrTiO3/(Sr1-x,Lax)TiO3 oxide superlattices 2011.09.09 84944
268 <10/5> Acoustic Metamaterials and Reversal of Sound 2011.09.26 95451
267 <10/12> Introduction to the Proton Engineering Frontier Project 2011.10.10 81910
266 <10/26> 빛으로 보는 세상 2011.10.17 80123
265 <11/2> Color Science for Reflective mode Optical Shutter 2011.10.27 168379
264 <11/9> Bosons in high Tc superconductors: an experimental survey 2011.10.31 115347
263 <11/16> Study of carrier transport and charging effects in organic devices 2011.11.10 118251
262 <11/23> How statistical physics contributes to Internet world: perspectives, methods and applications 2011.11.15 93711
261 <11/30> 기능성 산화물의 현황과 응용 2011.11.24 80595
260 <12/7> Optical Antennas 2011.11.30 90192
259 2012학년도 1학기 콜로퀴움 일정 안내 [5] 2012.02.29 86197
258 <3/14> 시공간 왜곡과 우주론(Spacetime warp and Cosmology) 2012.03.07 79514
257 <3/21> 우주가속팽창의 원인 규명 2012.03.15 91233