visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

Search for dark matter axion with Rydberg atoms

2021.03.19 17:37

admin 조회 수:6344

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)
365 2025-04-29 16:00  Dr. Tokuro Shimokawa (Okinawa Institute of Science and Technology)  Can experimentally-accessible measures of entanglement distinguish quantum spin liquid and random singlet phases? file
364 2018-10-16 10:00    Capturing protein cluster dynamics and gene expression output in live cells file
363 2023-02-28 11:00    Topotactic redox engineering toward novel material file
362 2022-11-10 16:00    Probing the Origin of Cosmic Infrared Background and Future Prospects with SPHEREx
361 2015-11-10 16:00    Rapid heating of matter using high power lasers
360 2015-12-01 16:00    Introducing extra dimensions to spectroscopic studies of advanced quantum materials
359 2025-04-29 10:00  Dr. Yeonju Go (Brookhaven National Laboratory)  Exploring the Hottest Matter in the Universe: Quark-Gluon Plasma through Hard Probes and Artificial Intelligence file
358 2023-04-13 11:00    [High Energy Theory Seminar]Noninvertible Gauss Law and Axions
357 2023-12-14 16:00    Superconducting qubits for large-scale quantum computers file
356 2016-09-02 14:30    Nanoscale Thermal Physics: Seebeck Effect and Nanoscale Friction
355 2016-09-02 16:00    Quantum Electrical Transport in Topological Insulator Nanowires
354 2018-10-15 16:00    Universal properties of macroscopic current-carrying systems file
353 2018-04-11 13:30    Probing 3D Structure and Physical Properties of Materials at the Single-Atom Level file
352 2022-06-10 11:00    Record-quality two-dimensional electron systems file
351 2022-05-13 16:00    High-fidelity iToffoli gate for fixed-frequency superconducting qubits file
350 2017-05-12 13:30    Topological Dirac insulator
349 2025-07-03 14:00  Dr. Young-Gwan Choi (Max Planck Institute )  Quantum sensing with NV centers: nanoscale magnetometry file
348 2018-04-11 16:00    Non-Gaussian states of multimode light generated via hybrid quantum information processing file
347 2016-05-13 13:30    Aperiodic crystals in low dimensions
346 2022-08-09 14:00    Quantum biology in fluorescent protein: a new model system to study quantum effects in biology file