Home ContactSitemap CAS中文
About Us
Brief Introduction
History
Directors
Organization
Research Groups
Scientific Progress
Seminars
Colloquia
CAS Members
Experts
Faculty
Research Fields
Center for Astro-geodynamics
Center for Galaxy and Cosmology
DRAST (Division of Radio Astronomy Science and Technology )
High Technology Laboratories

Location: Home>Research>Seminars
Testing Fundamental Physics With Fast Radio Bursts
Author:
ArticleSource:
Update time: 2017-05-08
Close
Text Size: A A A
Print

Talk delivered in Chinese, with slides in English 
Title: Testing Fundamental Physics With Fast Radio Bursts 
Speaker: Xuefeng Wu (PMO) 
Time: 3 PM, May 11th (Thursday)  

Abstract: 
The Einstein's weak equivalence principle (WEP) is one of the foundations of general relativity and many other metric theories of gravity. At the post-Newtonian level, the accuracy of the WEP can be tested through the numerical values of the parametrized post-Newtonian (PPN) parameters, such as the parameter γ.  Specifically, the WEP accuracy/violation can be constrained by comparing the γ values for different kinds of particles, or for the same kind of particle with different energies, since all gravity theories satisfying the WEP predict the same γ values for different test particles. On the other hand, the question of whether the photon has a finite rest mass is one of the most important and interesting issues in modern physics, as it is closely related to many fundamental questions such as charge conservation and quantization, and so on. Hence, it is need to push the constraints on the photon mass as far as possible. The most direct method of constraining the photon mass is to detect a possible frequency dependence of the speed of light. In this talk, I will show that both the WEP violation and the rest mass of photon can be well constrained using the time delay of photons with different frequencies arising in extragalactic fast radio bursts (FRBs), which is a new type of millisecond radio burst transients attracting wide attention in the recent years.  

Shanghai Astronomical Observatory, All Rights Reserved
80 Nandan Road, Shanghai 200030, China
Tel: +86-21-64386191 Email:shao@shao.ac.cn