Ruprecht Karls Universität Heidelberg

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

joint [2020/02/13 10:58]
marta [Selected topics in theory and observations of Dark Energy (ITP Cosmology Tunch) + Journal Club]
joint [2020/02/13 11:00] (current)
marta
Line 28: Line 28:
 == 13th February 2020: Journal Club == == 13th February 2020: Journal Club ==
  
-TBA+Christof Wetterich - The great emptiness at the beginning of the Universe 
 + 
 +This informal discussion concerns the proposal of the great emptiness as a possible beginning of the Universe in the infinite past of physical time. In the beginning, particles are very rare and effectively massless. Only expectation values of fields and average fluctuations characterize the lightlike vacuum of this empty Universe. Our observed inhomogeneous Universe can be extrapolated backwards to the lightlike vacuum in the infinite past, and therefore can have lasted eternally. There is no physical big bang singularity. Standard inflation models admit a primordial flat frame for which spacetime is flat in the infinite past. 
 + 
 +This discussion is based [[ https://​arxiv.org/​abs/​1912.00792 | view arXiv ]] \\ 
  
 == 6th February 2020: Selected topics in theory and observations of Dark Energy (Tunch) == == 6th February 2020: Selected topics in theory and observations of Dark Energy (Tunch) ==
Line 38: Line 42:
 == 30th January 2020: Journal Club == == 30th January 2020: Journal Club ==
  
-TBA+David Camarena 
 + 
 +Cosmological model insensitivity of local H0 from the Cepheid distance ladder \\ 
 +S. Dhawan, D. Brout, D. Scolnic, A. Goobar, A.G. Riess, V. Miranda \\ 
 +[[ https://​arxiv.org/​abs/​2001.09260 | view arXiv ]] \\
  
 == 23rd January 2020: Selected topics in theory and observations of Dark Energy (Tunch) == == 23rd January 2020: Selected topics in theory and observations of Dark Energy (Tunch) ==

Interna    Links    Tel.    InfoScreen                      Kontakt