visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Search for dark matter axion with Rydberg atoms

2021.03.19 17:37

admin 조회 수:2321

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
389 2022-03-29 10:00  E6 #1501/zoom, E6 #2502/zoom  Non-reciprocal phase transitions file
388 2022-10-04 16:00  E6 #2501  Distinguishing 6d (1, 0) SCFTs
387 2022-04-14 16:00  E6 1323  (광학분야 특별세미나)Holographic tomography of dielectric tensors at optical frequency
386 2022-04-28 16:00  E6 1323  (광학분야 특별세미나)Adiabaticity and symmetry in optical waveguide design
385 2022-05-10 16:00  E6 1323  (광학분야 특별세미나)Testing quantum thermodynamics using quantum optics
384 2022-05-26 16:00  E6 1323  (광학분야 특별세미나)Topological photonic devices
383 2022-06-23 11:00  E6 Room(#1322)  JILA’s search for the electron’s Electric Dipole Moment (eEDM) to probe physics beyond the standard model file
382 2023-02-28 11:00  E6 Room(#1322)  Topotactic redox engineering toward novel material file
381 2018-11-22 15:00  E6 Room(#1323)  Experimental and Computational Study on Physical Properties based on Granular System file
380 2019-05-08 16:00  E6 Room(#1323)  Imaging valley dependent electron transport in 2D semiconductors file
379 2019-08-16 14:00  E6 Room(#1323)  Multiferroic and Magnetoelectric Effects by Tailoring Interfacial Chemistry and Physics in Correlated Oxides file
378 2019-08-01 14:00  E6 Room(#1323)  Low-density Superconductivity in SrTiO3 Probed by Planar Tunneling Spectroscopy file
377 2019-08-06 16:00  E6 Room(#1323)  Visualization of in-plane piezoresponse vector fields file
376 2022-05-25 14:00  E6 Room(#2501)  Atomic-level insights into ferroelectric switching and preferred orientation of ultrathin hafnia file
375 2019-07-08 14:00  E6, #1322  Ultrabroadband squeezed pulses and their relation to relativity file
374 2023-07-10 16:00  E6, #1323  Electronic structures of magnetic and non-magnetic ordering in d- and f-electrons systems
373 2024-02-16 10:00  E6, #1323  Optical conductivity of superconducting states driven by Van Hove singularities
372 2015-10-23 10:30  E6, #1501  How to write a good scientific paper[Open lecture series]
371 2022-02-28 16:00  E6, #1501  Spin-based training of optical microscopes
370 2022-03-07 16:00  E6, #1501  Climate Physics and Modelling(우리말강의)