visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2022-01-12 11:00 
일시 Jan 12th (Wed), 11:00 AM 
장소 Zoom and E6 #1323 
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: https://kaist.zoom.us/j/86232436126

 

 

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 (mskang@kaist.ac.kr)

번호 날짜 장소 제목
362 2018-12-07 14:30  E6-2. 1st fl. #1323  Spin generation from heat and light in metals file
361 2018-12-07 16:00  E6-2. 1st fl. #1323  Novel probes of interacting electrons in 2D systems file
360 2018-12-11 16:00  E6-2. 1st fl. #1323  Natural compact representation of Matsubara Green’s functions: applications to analytic continuation and quantum many-body simulations file
359 2018-12-16 16:00  E6-2. 1st fl. #1323  Lectures on 2d Conformal Field Theory file
358 2018-12-26 16:00  E6-1. 3rd fl. #3434  Informal Workshop on Topology and Correlation file
357 2018-12-26 16:00  E6-2. 1st fl. #1323  Brane-like defect in 3D toric code file
356 2018-12-27 16:00  E6-2. 1st fl. #1323  Quantum Innovation (QuIN) Laboratory file
355 2019-01-07 15:00  E6-2. 2st fl. #2501  Many-Body Invariants for Multipoles in Higher-Order Topological Insulators file
354 2019-01-09 16:00  E6-2. 2nd fl. #2501  Molecular Mott state in the deficient spinel GaV4S8 file
353 2019-01-23 16:00  Rm. C303, Creation Hall (3F), Munji Campus  Ultrasensitive Microwave Bolometer: Opportunity for Axion Detectors file
352 2019-02-21 16:00  #5313, E6-2  B-meson charged current anomalies - Theoretical status file
351 2019-02-25 16:00  Rm. 1501 (E6)  Spring 2019: Physics Colloquium file
350 2019-03-21 16:00  RM. 1323, E6-2  Spring 2019: Physics Seminar Serises file
349 2019-03-26 15:00  E6-2. 2st fl. #2501  Consideration of thermal Hall effect in frustrated and un-frustrated quantum magnets file
348 2019-03-29 14:30  E6-2. 1st fl. #1323  Epitaxial Multifunctional Oxide Thin Films for Novel Electronics file
347 2019-03-29 16:00  E6-2. 1st fl. #1323  Coherent Quantum Control and Magnetism on atoms – Trapped ion and ESR STM file
346 2019-04-04 16:00  #1323, E6-2  Chiral spin-photon interaction at nanoscale file
345 2019-04-11 16:00  #1323, E6-2  Massive screening for cathode active materials using deep neural network file
344 2019-04-19 11:00  #1323, E6-2  First-principles studies of semiconductors for solar cell applications file
343 2019-04-19 14:30  E6-2. 1st fl. #1323  A family of finite-temperature electronic phase transitions in graphene multilayers file