Institute of Theoretical Physics
Chinese Academy of Sciences

学术报告

Title
题目

Searching for Standard Clocks in the Primordial Universe

Speaker
报告人

Dr. Xingang Chen

Center for Theoretical Cosmology, DAMTP, University of Cambridge

Date
日期

2013-05-09 AM 09:30 Thursday

Venue
地点

Conference Hall 322, ITP/理论物理所322报告厅

Abstract
摘要

An outstanding challenge in modern cosmology is to search for direct evidences that can be used to distinguish between different primordial universe paradigms that lead to the Big Bang model, namely between inflation and other possible alternatives. We show that a generic type of signals that exist in the primordial universe can be used for such a purpose. These signals are induced by tiny oscillations of massive fields, and can be used as the "standard clock". They generate features in the primordial density perturbations that directly record the scale factor evolution a(t), and therefore can provide direct evidence for specific paradigm.

Collaborator
所内联系人

郭舒婷