korean english


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


번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1058659
162 <11/19> From Schrödinger's cat to quantum technology using light 2010.11.11 97445
161 <11/9(Fri.) 11:00am>Geometrically frustrated magnetism on triangular lattice 2018.11.05 97470
160 <4/19> Nuclear Reaction Theories 2011.04.14 97658
159 <4/5(Wed.) 11:00am>Adhesion forces between nanoparticles in gas-phase processes and application 2017.04.03 97755
158 <5/9> Nonequilibrium Critical Phenomena: Fractals and Self-Organized Criticality 2008.05.06 97758
157 <7/3> Complex networks and the graph structure of metabolism 2008.06.26 97799
156 <5/11>Emergent Geometry as Quantum Gravity 2009.05.07 98291
155 <9/26(Thu.) 4:30 pm ~ > Neutrino Physics and Dark Matter search in IBS 2019.09.24 98374
154 <11/28> Extremal Black Holes and Holographic C-theorem 2012.11.28 98435
153 <5/30(금)> 입자물리이론 그룹 미니 워크숍 개최 안내 2014.05.29 98639
152 <10/10> Spin transistor : Detection and manipulation of spin transport in semiconductor 2012.09.27 98996
151 <5/18> Baryons in AdS/QCD 2007.05.15 99813
150 <4/28> Generalised cosmological scaling solutions in braneworld and their duality properties 2006.04.24 100011
149 <7/24(Mon.)11:00>Antenna Arrays for Astroparticle Physics: Radio Detection of High-Energy Cosmic Rays 2017.07.19 100468
148 <11/26> Effective Holographic Theories for Condensed Matter Systems 2010.11.23 100514
147 <10/15> An Ideal Mean-Field Transition in a Driven Interacting System 2009.09.30 101332
146 <11/13(Tue.) 11:00am>Hund’s coupling driven role of $d_{3z^2-r^2}$ in stabilizing the hole-doped antiferromagnetic state in cuprates 2018.11.09 101344
145 <6/26> Hawking radiation and divergence anomalies 2008.06.26 101570
144 <Oct. 28(Wed.) 4:30 PM> Anomalous diffusion of single-molecules in living cells: at the interface of biology and statistical physics 2015.10.19 101592
143 <8/4> Remarks on the Scalar Graviton and Consistency of Horava Gravity 2010.07.28 101710