Bounce Scenarios in Cosmology

Conference Date: 
Monday, June 26, 2017 (All day) to Wednesday, June 28, 2017 (All day)
Scientific Areas: 


In standard cosmology, the history of the Universe started with an initial big bang singularity where the description by general relativity breaks down. This basic incompleteness of cosmology suggests the need to go beyond general relativity, or beyond matter satisfying the Null Energy Condition, in order to account for the origin of the Universe. An attractive possibility which has gained popularity in recent years is to replace the big bang by a bounce, in which an expanding Universe emerges from a prior period of contraction. This workshop will bring together researchers who have developed different types of bounce scenarios in cosmology. Focus points of the workshop will be comparison of foundations of the different approaches, discussion of conceptual questions, such as whether a classical description of a bounce can make sense or quantum mechanics is essential, and relation to cosmological observations, in particular in light of the usual claim that physics at the big bang is observationally irrelevant.

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  • Stephon Alexander, Brown University
  • Abhay Ashtekar, Pennsylvania State University
  • Aurlien Barrau, Laboratory of Subatomic Physics & Cosmology of Grenoble
  • Martin Bojowald, Pennsylvania State University
  • Robert Brandenberger, McGill University
  • *Claudia de Rham, Imperial College London
  • Brajesh Gupt, Pennsylvania State University
  • Jean-Luc Lehners, Albert Einstein Institute
  • Mairi Sakellariadou, Kings College London
  • Paul Steinhardt, Princeton University
  • Edward Wilson-Ewing, Albert Einstein Institute

* via teleconference

Scientifc Organziers:

  • Steffen Gielen, Perimeter Institute & CITA
  • Neil Turok, Perimeter Institute