QG4 - Loop Quantum gravity, Quantum Geometry, Spin Foams |
Speaker_ |
Ashtekar, Abhay |
Co-autors |
Tomasz Pawlowski and Parampreet Singh |
Talk _ |
Recent Advances in Loop Quantum Cosmology |
Abstract _ |
As requested by the session organizer, I will summarize some recent advances in loop quantum cosmology which have resulted through the introduction of new analytical and numerical methods. They enable one to go significantly beyond the singularity resolution. In simple models one can introduce a convenient `emergent time', construct the physical Hilbert space and Dirac observables, show that the classical big big-bang is replaced by a quantum bounce and that the pre and post big-bang branches are joined by a deterministic quantum evolution. |