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: Three magics to hold an atom without perturbation

 

연사: 조   동   현 교수님 (고려대학교)

 

일시: 2011년 5월 18(수) 오후4:30

 

장소: e+첨단강의실 (31214호실)

 

초록: Trapped atoms with long interrogation time provide excellent sample for both spectroscopy an uantum information processing (QIP). Potential well of a trap, however, perturbs internal state of toms as well as holding them. Even in an optical trap, which is least perturbative
among  various raps, systematic shift and inhomogeneous broadening of a transition seriously limit its utility as a tool in spectroscopy and QIP. We will report some of the tricks developed to overcome this difficulty.
For a transition in an optical frequency domain, magic wavelength using three-level system has been emonstrated for cesium and ytterbium atoms.

We have proposed magic power for a pulsed optical rap, which can result in a perturbation-free spectroscopy of a transition in an optical frequency
omain. The idea is applicable to a general two-level system and we carried out a proof-of-principle experiment using cesium atoms. For a hyperfine

transition of a ground-state alkali metal atoms, dual beam optical trap and spin-echo have been tried to overcome the inhomogeneous broadening
with a limited success. Recently we proposed the idea of magic polarization, where difference in he scalar polarizabilities of the two hyperfine levels

is compensated by the vector polarizabilities.With a proper polarization of th trapping beam, the vector term can be tuned to eliminate the ystematic
shift  and  the inhomogeneous broadening of a microwave transition. We will report our progress in the magic polarization experiment using lithium

atoms.
 

번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1079487
130 <10/12> Introduction to the Proton Engineering Frontier Project 2011.10.10 81357
129 <10/5> Acoustic Metamaterials and Reversal of Sound 2011.09.26 92965
128 <9/21> Electronic phase transition in low dimensional SrTiO3/(Sr1-x,Lax)TiO3 oxide superlattices 2011.09.09 83999
127 <9/7> 과학과 예술 (Science and Arts) 2011.08.30 80958
126 2011학년도 2학기 콜로퀴움 일정 안내 2011.08.22 87871
125 <6/8> 액체금속 및 물의 과냉각 현상과 국소구조와의 관계 : 정전기 공중부양 기술 및 dynamic diamond anvil cell 2011.06.07 109288
124 <6/1> Electron phonon coupling effect in 4d transition metal oxide magnetism 2011.05.26 104769
123 <5/25> 나노켈빈 원자 기체의 보즈-아인슈타인 응집 2011.05.18 85000
» <5/18> Three magics to hold an atom without perturbation 2011.05.09 99422
121 <5/11> Hybrid Josephson Junctions of Various Nanostructures 2011.05.04 101484
120 <5/4> Kondo effect in nanoscopic devices 2011.04.28 84676
119 <4/27> RENO Reactor Neutrino Experiment 2011.04.18 109047
118 <4/6> Knowledge is power: Maxwell's demon in the quantum wonderland 2011.03.31 143545
117 <3/30> Supersolidity in Helium 2011.03.25 85385
116 <3/23> 동서양의 세계관과 풍경화 2011.03.17 85367
115 <3/16> Inelastic X-ray Scattering: past, present, and the future 2011.03.10 88075
114 <3/9> Understanding the Nature of Metal-Insulator Transition in a Single Crystalline VO2 nanowires 2011.03.04 96129
113 2011학년도 1학기 콜로퀴엄 일정 안내 2011.01.25 80001
112 <12/3> Characteristic of risk asset in financial market. 2010.11.29 127973
111 <11/26> The Carbon New Age 2010.11.18 94200