초청 세미나

Jongchul Mun (KRISS) jcmun@kriss.re.kr

TITLE: Ultracold bosonic and fermionic atoms in an optical lattice

Abstract

A standing wave of a laser beam provides artificial crystal structure, which is called optical lattice. The optical lattice is fully controllable and it offers tunability and dynamical control to experimental system. Systems of ultracold atoms loaded in an optical lattice provide experimental means to realize matter-wave interferometers as well as to model many condensed matter systems, especially Hubbard system. In Bose-Hubbard model, there are two quantum phases: superfluid(SF), Mott insulator(MI). After the quantum phase transition between SF and MI phases using Bose Einstein condensates (BEC) in an optical lattice was demonstrated in 2002, many studies has been followed to understand the MI phase of this system, an important paradigm for the suppression of transport by particle correlation. In this talk, I am going to briefly report three experiments done using BEC in optical lattice; atom parametric amplification in optical lattice, shell structures of the MI phase, and transport proerties of the SF and MI phase. Then, the experiment with fermionic atoms in an optical lattice is covered.

약력: 1998-2002: KAIST 물리학 학사 2002-2008: MIT 물리학 박사 주제: Bose-Einstein Condensate in Optical Lattice, 지도교수: Wolfgang Ketterle, David Pritchard 2008 -현재: KRISS 선임연구원, 프로젝트: 초저온 페르미 양자기체를 이용한 물질파 간섭계