The 2nd International Symposium on Cosmology and Ali CMB Polarization Telescope

Session

science-6:

8 Sep 2019, 15:50

京师大厦3楼6会议室 (北京师范大学)

Contribution list Timetable

36. Analysis techniques for CMB B-mode experiments

Prof. Ben Wandelt (Flatiron)

08/09/2019, 15:50

The hunt for CMB polarization B-modes is on. Many obstacles lie along the way besides the obvious cost driver of high sensitivity. Instrumental, atmospheric, and astrophysical systematics are challenges that can be addressed with sophisticated analysis techniques. I will advertise a series of recent results that break through several of these obstacles: optimal and efficient B-mode...

9. Propagation of the gravitational waves in a cosmological background

Prof. Xian Gao (SYSU)

08/09/2019, 16:20

Based on the framework of spatially covariant gravity, we derive the general quadratic action for the gravitational waves in a cosmological background. Special attention is paid to the propagation speed of the gravitational waves. In particular, we identify a large class of spatially covariant gravity theories with parity violation, in which both the polarization modes propagate in the speed...

38. Deep learning the cosmic large scale structure

Prof. Xiao-Dong Li (SYSU)

08/09/2019, 16:35

We use the deep CNN to map the complex, non-linear cosmic large-scale structure to the underlying cosmological parameters $\Omega_m$, $\sigma_8$. In the ideal case, we can achieve a constraint 6 times better than the Planck CMB results, just using a $(256 \rm Mpc/h)^3$ box of dark matter density field with 2 Mpc/h resolution. Machine learning may play a very important role in the future...

27. Effective field theory of small r

Prof. Taotao Qiu (CCNU)

08/09/2019, 16:50

In this talk, I will utilize the effective field theory approach to explore the general features of cosmological models in the early universe that give rise to small tensor-to-scalar ratio, which is favored by current (and probably future) observations.

30. Future constraints from the gravitational wave standard siren data

明辉 杜 (大连理工大学)

08/09/2019, 17:05

The detection of gravitational waves (GW) by the LIGO and Virgo collaborations offers a whole new range of possible tests and opens up a new window which may shed light on the nature of gravitaion, dark energy and dark matter, etc. Recently, our group investigate how future gravitational wave standard siren (GWSS) data could help to constrain different cosmological models. In particular, our...