Harvesting primordial black holes from stochastic trees
In a recent publication, Chiara, Pierre and Baptiste, together with Vincent Vennin, have developed a novel framework to implement stochastic inflation on random trees. These trees represent dynamically how different regions of space grow and gradually become causally disconnected.
More …Cosmology Seminar
The next cosmology seminar takes place on Thursday 30th of January, room E349 at 4:00pm. Our guest speaker is Anish Ghoshal from Warsaw U. (Poland).
More …Cosmology Seminars Marathon
The next cosmology seminars take place on Friday 13th of December, seminar room E349 at 9:45am. Our guest speakers are Jibril Ben Achour from Munich U. (Germany) and Hugo Roussille from ENS Lyon (France).
More …Vanilla Inflation Predicts Negative Running
Within the landscape of single-field slow-roll models, and given the present cosmological data, we show that Cosmic Inflation predicts a small negative running of the spectral index of the cosmological fluctuations. This quantity imprints the large scale structures of the universe and we have just made a prediction for its value. Will it be measured negative and small?
More …Clocking the End of Cosmic Inflation
Making observable predictions for cosmic inflation requires determining when the wavenumbers of astrophysical interest today exited the Hubble radius during the inflationary epoch. These instants are commonly evaluated using the slow-roll approximation and measured in e-folds time. Pierre, Baptiste and Christophe propose a new analytical method to determine these instants with a precision reaching the tenth of an e-fold.
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