Beyond Scalar Field Cosmology | Department of Physics

Seminar

QUEST Center event

No

Speaker

Ido Ben Dayan, Ariel / University of California at Berkeley

Date

13/12/2021 - 20:30 - 19:00Add to Calendar 2021-12-13 19:00:00 2021-12-13 20:30:00 Beyond Scalar Field Cosmology The Concordance Model of Cosmology describes the Universe on large scales and its parameters have been measured to an accuracy of a percent. I will discuss current challenges of the model and attempts to address them. Emphasis will be given to the role emergent collective phenomena beyond a single scalar field may have in the early and late Universe. As an application I will show that the thermal average of "unparticles" can avoid the Big Bang singularity, act as a Dark Energy model and reduce the Hubble tension. Note: This seminar will be given *only* on Zoom (meeting id 9290951953), from sunny California. Zoom: https://zoom.us/j/9290951953 Department of Physics physics.dept@mail.biu.ac.il Asia/Jerusalem public

Place

Zoom: https://zoom.us/j/9290951953

Abstract

The Concordance Model of Cosmology describes the Universe on large scales and its parameters have been measured to an accuracy of a percent.

I will discuss current challenges of the model and attempts to address them.

Emphasis will be given to the role emergent collective phenomena beyond a single scalar field may have in the early and late Universe.

As an application I will show that the thermal average of "unparticles" can avoid the Big Bang singularity, act as a Dark Energy model and reduce the Hubble tension.

Note: This seminar will be given *only* on Zoom (meeting id 9290951953), from sunny California.