visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2020-12-10 13:55 
연사  
장소 Zoom 

Title : Consistency of Boltzmann equation and light dark matter from inflaton decay 

 
Speaker: Dr Yin Wen (University of Tokyo)

 

Abstract:
Boltzmann equation plays important roles in particle cosmology in studying the evolution of distribution functions (also called as
occupation numbers) of various particles. For the case of the decay of a scalar condensation into a pair of scalar particles, we
point out that the system may not be well described by the Boltzmann equation when the occupation number of daughter particles becomes large even in the so-called narrow resonance regime.
In the second part, I will show a new simple mechanism for the light dark matter (DM) production from the decay of the oscillating
inflaton condensation. If the reheating temperature after inflation is higher than the inflaton mass, which is of the same order of the momentum of the DM at the time of the production, the DM momentum can be suppressed compared to the temperature of the thermal plasma if the interaction of the DM is weak enough. In addition, the DM can be abundant enough.

 

Zoom Link:
Time: Dec 10, 2020 01:55 PM Seoul

 

 

Meeting ID: 875 7667 2928
Passcode: 028371
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)
394 2019-04-19 16:00    Graphene and hBN heterostructures file
393 2019-04-23 16:00    From Mott physics to high-temperature superconductivity file
392 2019-04-26 16:00    Robust Quantum Metrology using Strongly Interacting Spin Ensembles and Quantum Convolutional Neural Network file
391 2019-05-01 16:00    Raman and x-ray scattering study on correlated electron systems: two case examples file
390 2019-05-02 16:00    Anomalous optical properties of halide perovskites file
389 2019-05-03 11:00    Exotic Magnetism file
388 2019-05-08 16:00    Imaging valley dependent electron transport in 2D semiconductors file
387 2019-05-09 16:00    Quantum Optical Sensing Using Single Photons And Single Photon Emission from Single Emitters file
386 2019-05-21 16:00    Classification of flat bands according to the band-crossing singularity of Bloch wave functions file
385 2019-05-24 16:00    Infrared spectroscopy study on metal-insulator transitions in layered perovskite iridates file
384 2019-05-30 16:00    Tuning the excitonic properties of semiconductors with light-matter interactions file
383 2019-05-31 11:00    Cavity QED with Spin Qubits file
382 2019-06-04 17:00    Stochastic nature of bacterial eradication using antibiotics file
381 2019-06-12 15:00    The relation between free and interacting fermionic SPT phases file
380 2019-06-17 10:30    Chiral Spintronics file
379 2019-06-24 11:00    Topological photonic anomalies file
378 2019-06-27 14:00    Gapless Kitaev Spin Liquid to Loop and String Gases file
377 2019-06-28 13:30    Magnetic domains and domain wall conduction in pyrochlore iridate thin films and heterostructures file
376 2019-06-28 14:00    1st Research-exchange meeting of computational material physics file
375 2019-07-03 15:00    Many-body quantum electrodynamis (QED) with atoms and photons: A new platform for quantum optics" file