visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Search for dark matter axion with Rydberg atoms

2021.03.19 17:37

admin 조회 수:2937

날짜 2021-03-25 16:00 
일시 Mar25(Thur), 04:00PM 
장소 Online Seminar (Zoom) 
연사 Prof. Atsushi Tokiyasu (Tohoku Univ.) 

Topic: Search for dark matter axion with Rydberg atoms

 

Speaker: Prof. Atsushi Tokiyasu


Date: March 25, 2021 (Thursday)
Time: 4:00 PM

 

Venue: Online Seminar (Zoom Teleconference System)
 
https://kaist.zoom.us/j/6108068959?pwd=TXV2OGlWdVRtcGhmNXVTRWlla2pHQT09

Meeting ID: 610 806 8959

Passcode: 131015
     

Abstract:     

 

Axion is a hypothetical particle, originally proposed to solve the Strong CP problem in the QCD theory. Axion is believed to be generated in the early universe, and it is known to be one of the candidates of cosmic dark matter.

Many search experiments were performed, but the existence of axion has not been established yet.

From the recent observation on the cosmic microwave and the theoretical calculation, it is suggested that the
axion has a mass of O(100) micro-eV. We are aiming to search for axion in this mass region (New-CARRACK
project).
In the New-CARRACK project, we are planning to search for axion by using a single photon detection method.
Single photon detection is free from the standard quantum limit, and allows us to search for axion with a wide
range of mass without degrading its detection sensitivity.
If the mass of axion is O(100) micro-eV, the converted photon with strong magnetic field have the frequency of O
(10) GHz. It is difficult to detect this photon with a micro-wave cavity, and we will use a Rydberg atom, which is an excited atom that have electrons with high principal quantum number (n~100).
Rydberg atom is known to be sensitive to micro-wave photons. By changing the excited level with the laser
system, we can control the sensitive frequency. In addition, we can search for axion in the wide mass range by
using direct photo-ionization processes.
 
We are now constructing a detector system which consists of superconducting magnet, a dilution refrigerator and high-precision laser system to excite a Rydberg atom.We have also found a new method to improve S/N of axion search which utilize
a cooled and bunched beam of Rydberg atoms.
 

 

In this seminar, the recent results of axion search experiments are reviewed. The overview of New-CARRACK project are
introduced, and the preparation status will be reported.
Poster_Tokiyasu (Revised).jpg

 

introduced, and the preparation status will be reported.

 

번호 날짜 장소 제목
344 2023-03-24 11:00  E6-2 #1323  (응집물리 세미나)Floquet simulators of topological surface states in isolation
343 2023-03-30 16:00  E6-2 #1323  (광학분야 세미나)Scalable quantum entanglement in trapped-ions based quantum computer
342 2023-01-11 16:00  E6-2 #1323  Non-abelian anyons and graph gauge theory on a superconducting processor, Eun-Ah Kim (Cornell University/Ewha Womans University)
341 2023-01-09 16:00  E6-2 #1323  Non-Hermitian Hopf-bundle Matter. Moon Jip Park (IBS-PCS)
340 2023-01-12 16:00  E6-2 #1323  Spin wavepackets in the Kagome ferromagnet Fe3Sn2: propagation and precursors
339 2023-01-10 16:00  E6-2 #1323  Terahertz Spectroscopy of Quantum Materials, Jae Hoon Kim (Yonsei University)
338 2022-09-29 16:00  E6-2 #1323  (광학분야 세미나) Ultrafast THz Field-Induced Nonlinear Optics
337 2023-04-06 16:00  E6-2 #1323  (광학분야 세미나)Nanophotonics-based approaches to explore Berry physics
336 2022-09-22 16:00  E6-2 #1323  (광학분야 세미나) Quasi-particle-like optical vortices in magnetic materials
335 2023-01-11 11:00  E6-2 #1323  Directly proving magnetoelastic coupling in a soft ferromagnet using Lorentz 4D-STEM file
334 2023-03-16 16:00  E6-2 #1323  (광학분야 세미나) Investigation of 3D cell mechanics using refractive-index tomography
333 2022-11-03 13:00  E6-2 #1323  [High-Energy Theory Seminar] Supersymmetric observables via Fermi-gas method
332 2022-11-17 16:00  E6-2 #1323  (광학분야 세미나) Ultrastructural and Spectroscopic Studies by Super-Resolution Fluorescence Microscopy
331 2023-04-27 16:00  E6-2 #1323  (광학분야 세미나)On-chip spectrometers based on CMOS image sensors
330 2022-10-27 16:00  E6-2 #1323  (광학분야 세미나) Cavity optomechanical systems for quantum transduction
329 2023-05-19 11:00  E6-2 #1323  (응집물리 세미나)Dipole condensations in Tilted Bose-Hubbard Chains
328 2023-04-14 12:00  E6-2 #1323  (응집물리 세미나)Exotic quantum phenomena in two-dimensional materials file
327 2023-05-12 11:00  E6-2 #1323  (응집물리 세미나)Interlayer conductivity and plasmon in weakly coupled layered systems
326 2022-11-11 11:00  E6-2 #1323  [Update 세미나영상] (응집물리 세미나) Honeycomb oxide heterostructures for quantum spin liquid file
325 2022-10-07 11:00  E6-2 #1323  [Update 세미나 영상] (응집물리 세미나) Competing orders in a vanadium-based kagome metal monolayer file