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 1058980
681 2019학년도 2학기 콜로퀴움 일정 2019.07.17 424877
680 <12/3> Magnetic couplings, optical spectra, and spin-orbit exciton in 5d Mott insulator Sr2IrO4 2012.11.26 362733
679 <Mar.3(Wed.)>Scaling laws in Natural Language Processing 2021.02.25 321473
678 2017학년도 1학기 콜로퀴움 일정 2017.01.05 284572
677 <10/25> Wave properties of dipole-exchange spin waves in confined magnetic thin films 2006.10.25 269073
676 2020학년도 1학기 콜로퀴움 일정 2020.01.31 253329
675 <5/16> 물리학자가 바라 본 단백질: 왜, 어떻게 연구하는가? 2012.05.10 253299
674 BK 석학초청 특별세미나 - Frustration and dimensional reduction in multi-orbital systems 2011.10.28 247912
673 <6/11> Advanced Physiological Optics and Its Ophthalmic Applications 2014.05.28 236377
672 <3/14>Adaptive Optics for the Human Eye and Ophthalmic Applications 2008.03.12 236153
671 <11/6> Graphene plasmon and Plasmonics 2013.10.31 235836
670 <8/30(Wed.)10:30>​Technology convergence and applications of Large-Area Electronics, e-Textiles, bio-sensors and bio-electronics 2017.08.29 230353
669 <6/17> Oscillating Fuzzy Sphere and M5/anti M5 configurations in ABJM model 2009.06.16 229798
668 <12/21> Special Seminar by Professor Ilya Vekhter 2010.11.30 227677
667 <Jan.14(Thu.)>Oxygen sponge effects for epitaxial manganite thin film design 2021.01.11 220062
666 <11/5(화)> 특별세미나 개최 안내 2013.11.01 216402
665 <June.12(Wed.)> Ribocomputing: Cellular Logic Computation using RNA Devices file 2019.06.07 210881
664 <5/16(토)> 세미나 개최 안내 2015.05.18 207193
663 <Sep. 23(Wed.) 4:30 PM>Grain boundary effect in Metal : A journey of discovery from crystal to thin films without grain boundaries 2015.09.16 199539