visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Search for dark matter axion with Rydberg atoms

2021.03.19 17:37

admin 조회 수:3379

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
» 2021-03-25 16:00    Search for dark matter axion with Rydberg atoms file
256 2021-04-02 14:30    Quantum computing and entanglement generation using trapped ions and photons
255 2021-04-02 16:00    Van der Waals heterostructures for orbital gating-based phototransistors and electronic spectroscopy
254 2021-04-09 10:00    Integrated Lithium Niobate Photonics file
253 2021-04-19 19:00    Evidence of Electrical Switching in Antiferromagnets and Coherent Spin Pumping file
252 2021-05-14 14:30    Electrically tunable spin valve effect in vertical van-der-Waals magnetic tunnel junctions file
251 2021-05-14 16:00    Spatial and temporal separation of environmental dephasing sources from solid-state quantum emitters file
250 2021-05-17 17:00    Spin current generation and detection in uniaxial antiferromagnets file
249 2021-05-27 16:00    찾아가는 물리연구 현장(유럽 입자물리학연구소 소개) file
248 2021-06-08 10:00    Photonic crystal devices for sensing file
247 2021-06-11 14:30    Engineering sound waves and vibrations in multi-mode nanomechanical systems file
246 2021-06-11 16:00    Pseudogap in surface-doped black phosphorus file
245 2021-06-22 17:00    Spintronics meets Quantum Materials file
244 2021-07-29 14:00    Gravitationally Induced Dark Sector and Inflationary Dynamics file
243 2021-11-02 16:00    Metrology of Band Topology via Resonant Inelastic X-ray Scattering file
242 2021-12-03 14:30    Topological Spin Textures: Skyrmions and Beyond file
241 2021-12-03 16:00    Nonequilibrium Heat Transport in Elemental Metals Probed by an Ultrathin Magnetic Thermometer file
240 2022-01-11 15:00    Ultrafast optical studies on CDW collective modes of the Weyl-CDW (TaSe4)2I file
239 2022-01-12 11:00    Spectroscopic study of trapped ions towards probing dark matter and new physics file
238 2022-01-17 14:00    Five Lectures on Observational Probes of Dark Energy file