• HOME
  • >
  • 소식
  • >
  • 세미나
장소 Zoom and E6 #1323 
일시 Jan 12th (Wed), 11:00 AM 
연사 Joonseok Hur (MIT) 


Title: Spectroscopic study of trapped ions towards probing dark matter and new physics


Speaker: Joonseok Hur (MIT)


January 12th (Wednesday), 11:00, E6 #1323 &

Zoom link:



Historically, precise atomic spectroscopy has led to new physics in many instances. Precision low-energy experiments may thus supplement high-energy and astrophysical approaches. It has been proposed to measure the isotope shifts (ISs) in ions to probe new physics using King plots [1], a two-dimensional graph that maps the measured ISs [2]. The Standard Model (SM) predicts in the leading order that the points in King plots should lie on a straight line. Departure from such linearity is unambiguously observed in our recent experiments with narrow optical transitions in trapped ions [3]. However, the contribution of higher-order corrections to the non-linearity within the SM complicates the test. The sources of the observed violation should be examined carefully to decouple the SM corrections arising from nuclear physics from possible new-physics contributions.

Here I will present our latest experimental and theoretical efforts to observe the non-linearity, identify its physical origin, and obtain the bound on dark boson-mediated interaction as a particular type of new physics that is of increasing interest. Future works will be discussed subsequently.


[1] J. C. Berengut et al., Physical Review Letters 120, 091801 (2018); V. V. Flambaum, A. J. Geddes, and A. V. Viatkina, Physical Review A 97, 032510 (2018); C. Delaunay et al., Physical Review D 96, 093001 (2017).

[2] W. H. King, Isotope Shifts in Atomic Spectra (Plenum Press, New York, 1984).

[3] I. Counts*, J. Hur* et al., Physical Review Letters 125, 123002 (2020) for the early stage of the work.




Contact: Myeongsoo Kang (

번호 일시 장소 연사 제목
242 4. 4(월), 16:00  E6, #1501  김희철교수 (Postech 물리학과)  New paradigms in Quantum Field Theory
241 2. 28(월),16:00  E6, #1501  김동규교수 (KAIST 물리학과)  Spin-based training of optical microscopes
240 3. 7(월),16:00`  E6, #1501  손석우교수 (서울대 지구환경과학부)  Climate Physics and Modelling(우리말강의)
239 3. 14(월),16:00  E6, #1501  박용근교수 (KAIST 물리학과)  Quantitative phase imaging and artificial intelligence: label-free 3D imaging, classification, and inference
238 3. 21(월),16:00  E6, #1501  이상성교수 (한국천문연구원)  Multi-wavelength Studies on Relativistic Jets from Gamma-ray Bright Active Galactic Nuclei
237 2015/10/23-12/4 10:30 AM  E6, #1501  Prof. YongKeun Park & Prof. Tae-Young Yoon  How to write a good scientific paper[Open lecture series]
236 2016/03/07-06/13  E6, 1501  Prof. David Helfman(KAIST) 외  Physics Colloquium : 2016 Spring file
235 2015/09/07-12/01  E6, 1501  문은국 교수(KAIST) 외  Physics Colloquium : 2015 Fall file
234 2009/02/23-05/04  E6, 1501  안종현교수(성균관대) 외  Physics Colloquium : 2009 Spring file
233 2009/09/07-11/30  E6, 1501  이주영박사(KIAS) 외  Physics Colloquium : 2009 Fall file
232 2009/10/21, 4PM  E6, 1501  최석봉교수(서울대)  Interdimensional Universality of Dynamic Interfaces
231 2010/02/08-05/03  E6, 1501  최인수교수(서울대) 외  Physics Ciolloquium : 2010 Spring file
230 2011/09/03-12/06  E6, 1501  김용균교수(한양대) 외  Physics Colloquium : 2011 Fall file
229 2010/09/06-12/06  E6, 1501  조호진기자(조선일보) 외  Physics Colloquium : 2010 Fall file
228 2010/02/14-05/09  E6, 1501  황철주(주성엔지니어링 사장) 외  Physics Colloquium - 2011 Spring file
227 2011/05/16, 4PM  E6, 1501  서민교교수(KAIST)  Photonics with surface plasmon polaritons
226 2012/02/13-05/14  E6, 1501  Kenji Ohmori (Photo-Molecular Science, IMS)  Physics Colloquium : 2012 Spring
225 2012/04/02, 4PM  E6, 1501  Yong Hee Jeong  A new route to ferroelectricity in magnetic spinels: a case of Co2MnO4
224 2013/03/11-06/10  E6, 1501  강명수교수(KAIST) 외  Physics Colloquium : 2013 Spring
223 2013/09/09-12/09  E6, 1501  박혁규교수(부산대) 외  Physics Colloquium : 2013 Fall