Observing the Big Bang: the Quantum Universe and its Imprint in the Sky Achucarro Boyarsky Schalm (Leiden) Freivogel Van der Schaar (UvA) Postma (Nikhef) Roest (Groningen) Prokopec Pajer (Utrecht) Bicep2 detecEon of primordial B-‐mode polarizaEon in the Cosmic Microwave Background radiaEon directly sourced by gravitaEonal waves from the big bang (inflaEon) If confirmed, this detec?on is -‐A detec?on of primordial gravitaEonal waves, the final missing predicEon from infla?on a quantum origin for large scale structures -‐A direct measure of the rate of expansion -‐-‐i.e. energy scale O(1016 GeV) -‐-‐ during infla?on the universe as the ul3mate accelerator -‐The first evidence of a quantum regime for gravity quantum gravity in the sky Many ques?ons Foregrounds – is the signal primordial? Is it tensor modes? Tension with Planck? (running, features…) High scale, large field infla?on -‐-‐ UV sensi?ve ! how is it embedded in a UV complete theory? features? Is it infla?on? (tensor spectrum) A(nother) new window for observing the Big Bang (*) B mode polariza?on (2014) Primordial non-‐gaussianity (2013) viewed through Large Scale Structures (*) We cannot repeat the experiment Next: large scale structures Map the distribution of matter in the universe (dark and luminous) and how it evolves in time EUCLID European Space Agency Expected launch 2020 Bicep/keck/pol CMB LSS Challenges 1.Ini?al condi?ons 2.From LSS to infla?on BF Bicep/keck/pol KS EP DR AA EP THC@NL community AB DR BF Bicep/keck/pol KS MP JP EP DR AB AA TP EP AA JP KS EP MP Exper?se AB BF Bicep/keck/pol KS PhD PD PD PD PD EP PhD PhD DR PhD PD AA EP AB The proposal PD Our challenges and goals: 1. To characterize the ini?al perturba?ons and their quantum origin: the mechanism of inflaEon 2. To connect late-‐?me observa?ons (CMB, LSS) to the physics of the primordial universe EffecEve field theory of large scale structures
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