visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Search for dark matter axion with Rydberg atoms

2021.03.19 17:37

admin 조회 수:6364

날짜 2021-03-25 16:00 
연사  
장소 Online Seminar (Zoom) 

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 연사 제목
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
305 2022-01-12 11:00    Spectroscopic study of trapped ions towards probing dark matter and new physics file
304 2019-09-10 15:00    (2+1) D Duality Web from 3D Euclidean Lattice file
303 2022-01-25 15:00    Emulating twisted double bilayer graphene with a multiorbital optical lattice file
302 2019-07-21 12:00    Challenges and Opportunities in Theoretical Particle Physics 2019 file
301 2024-03-13 16:00    [High-Energy Theory Seminar] The Schwarzschild Black Hole from Perturbation Theory to all Orders
300 2019-08-06 16:00    Visualization of in-plane piezoresponse vector fields file
299 2012-02-13 16:00    Physics Colloquium : 2012 Spring
298 2016-06-01 16:00    Laboratory experiments relevant to mesospheric clouds, Saturn’s rings & astrophysical jets
297 2023-03-22 16:00    (High Energy Theory Seminar) Boltzmann or Bogoliubov? A Case of Gravitational Particle Production
296 2019-07-03 15:00    Many-body quantum electrodynamis (QED) with atoms and photons: A new platform for quantum optics" file
295 2023-01-12 14:40    JILA 1D Wannier-Stark optical lattice clock file
294 2018-07-26 14:00    Inflation in String Theory and Backreaction file
293 2018-07-26 14:00    Inflation in String Theory and Backreaction file
292 2023-08-29 16:00    [High Energy Theory Seminar] Towards string loop corrections in Calabi-Yau orientifold compactifications.
291 2024-10-30 14:30    [Seminar Invitation] Mario Cuoco (CNR-SPIN, c/o University of Salerno, Fisciano, Italy) / 2024.10.30. 14:30 / E6-2, #3441
290 2020-08-17 20:00    Using magnetic tunnel junctions to compute like the brain file
289 2020-08-25 20:00    KAIST Global Forum for Spin and Beyond (Second Forum) file
288 2025-03-10 16:00  Marko Rancic (University of Luxembourg)  Quantum computing for physics and optimization problems file
287 2024-07-10 16:00    [High Energy Theory Seminar] The Weak Gravity Conjecture in Perturbative String Theory
286 2023-06-14 16:00    [High-Energy Theory Seminar]Vertex algebras and extended operators in 4d N=2 SCFTs