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Everpresent Lambda: Theory meets Observations

Conference Date: 
Lundi, Novembre 11, 2019 (All day) to Vendredi, Novembre 15, 2019 (All day)
Scientific Areas: 
Cosmology

 

One of the biggest mysteries in cosmology and fundamental physics is the nature of dark energy that is responsible for the current acceleration of cosmic expansion. While a cosmological constant provides the simplest model of dark energy, recent observational tensions amongst supernovae Ia, gravitational lensing time delays, and cosmic microwave background suggest the need for a more complex dynamical dark energy. One of the oldest proposals for a dynamical dark energy is “Everpresent Lambda” proposed by Sorkin, which is inspired by the causal set model of quantum gravity. It was recently shown that this model can potentially resolve the  tensions in cosmological observations. The meeting aims to bring together a small number of experts in quantum gravity, causal sets, and cosmology, to carefully examine the model’s theoretical predictions and its observational tests, and pave the way for what might be an(other) exciting insight from cosmology into the fundamental nature of spacetime.

  • Elizabeth Gould, Perimeter Institute & Queens University
  • David Kubiznak, Perimeter Institute
  • Jian Li, Simon Fraser University
  • Levon Pogosian, Simon Fraser University
  • Sumati Surya, Raman Research Institute
  • Yasaman Yazdi, Imperial College London
  • Nosiphiwo Zwane, University of Eswatini - via teleconference
  • Alan Coley, Dalhousie University
  • David Kubizinak, Perimeter Institute

Monday, November 11, 2019

Time

Event

Location

10:15 – 10:30am

Registration

Reception

10:30 – 11:00am

Coffee Break

Bistro – 1st Floor

11:00 – 12:00pm

Sumati Surya, Raman Research Institute
Introduction Causal Sets

Space Room

12:00 – 2:00pm

Lunch

Bistro – 1st Floor
Reserved Table

2:00 – 3:00pm

Rafael Sorkin, Perimeter Institute
Introduction to Everpresent Lambda

Space Room

3:00 – 3:30pm

Coffee Break

Bistro – 1st Floor

3:30 – 4:30pm

Niayesh Afshordi, Perimeter Institute & University of Waterloo
Status of Hubble tension in Cosmology

Space Room

 

Tuesday, November 12, 2019

Time

Event

Location

10:30 – 11:00am

Coffee Break

Bistro – 1st Floor

11:00 – 12:00pm

Yasaman Yazdi, Imperial College London
Causal Set Action/Entropy

Space Room

12:00 – 2:00pm

Lunch

Bistro – 1st Floor
Reserved Table

2:00 – 3:00pm

Jian Li, Simon Fraser University
Observational constraints on modified gravity and dark energy

Space Room

3:00 – 3:30pm

Coffee Break

Bistro – 1st Floor

3:30 – 4:30pm

Rafael Sorkin, Perimeter Institute
Supplementary considerations on Everpresent Lambda

Space Room

 

Wednesday, November 13, 2019

Time

Event

Location

10:30 – 11:00am

Coffee Break

Bistro – 1st Floor

11:00 – 12:00pm

Nosiphiwo Zwane, University of Eswatini
Everpresent Lambda in CosmoMC

Space Room

12:00 – 2:00pm

Lunch

Bistro – 1st Floor
Reserved Table

2:00 – 3:00pm

Levon Pogosian, Simon Fraser University
Implementing a stochastic dark energy framework into CAMB

Space Room

3:00 – 3:30pm

Coffee Break

Bistro – 1st Floor

3:30 – 4:30pm

Discussion
Bayesian Evidence for Stochastic Models

Space Room

 

Thursday, November 14, 2019 

Time

Event

Location

10:30 – 11:00am

Coffee Break

Bistro – 1st Floor

11:00 – 12:00pm

Nosiphiwo Zwane, University of Eswatini
Big Bang Nucleosynthesis

Space Room

12:00 – 2:00pm

Lunch

Bistro – 1st Floor
Reserved Table

2:00 – 3:00pm

Discussion
Lyman-alpha forest and other high-z tests

Space Room

3:00 – 3:30pm

Coffee Break

Bistro – 1st Floor

3:30 – 4:30pm

David Kubiznak, Perimeter Institute
Lessons from Thermodynamics with Lambda

Space Room

5:00 – 8:00pm

Pub Night

Bistro – 1st Floor

 

Friday, November 15, 2019

Time

Event

Location

10:30 – 11:00am

Coffee Break

Bistro – 1st Floor

11:00 – 12:00pm

Niayesh Afshordi, Perimeter Institute & University of Waterloo
Dark Matter from causal sets

Space Room

12:00 – 2:00pm

Lunch

Bistro – 1st Floor
Reserved Table

2:00 – 3:00pm

Discussion
Big Bang and Black Holes

Space Room

3:00 – 3:30pm

Coffee Break

Bistro – 1st Floor

3:30 – 4:30pm

Niayesh Afshordi, Perimeter Institute & University of Waterloo
Wrap Up & Good-Bye

Space Room

 

Scientific Organizers:

  • Niayesh Afshordi, Perimeter Institute & University of Waterloo
  • Rafael Sorkin, Perimeter Institute