VI series of Majorana Lectures - Gabriele Veneziano - Challenges in early- and late-time cosmology

Name: VI series of Majorana Lectures - Gabriele Veneziano - Challenges in early- and late-time cosmology
Start: 2017-02-20T10:20:00+01:00
End: 2017-02-22T13:00:00+01:00
Location: Dipartimento di Fisica Ettore Pancini

20 Feb 2017, 10:20 → 22 Feb 2017, 13:00 Europe/Rome

Aula Caianiello (Dipartimento di Fisica Ettore Pancini)

Aula Caianiello

Dipartimento di Fisica Ettore Pancini

Description

Gabriele Veneziano

(Collège de France and CERN)

Challenges in early- and late-time cosmology

Participants

Adriana Pecoraro
Alessandro Di Marco
Alessandro Spallicci
Alice Aldi
Andrea Addazi
antonio coniglio
Antonio de Candia
Bruno Cimmino
Cosimo Stornaiolo
Emanuela Scardapane
Emmanuele Battista
Fabio Mele
Fedele Lizzi
Francesco Cirotto
Francesco D'Andrea
Francesco Tramontano
Franco Pezzella
Franco Ventriglia
Gabriele Franzese
Gaetano Fiore
Giampiero Esposito
Giancarlo D'Ambrosio
Giovanni De Gregorio
Giovanni Fusco
Giovanni La Rana
Giulia Ricciardi
Luca Buonocore
Luca De Angelis
Luigi Cappiello
Luigi Coraggio
Luigi Rosa
Marcello Miranda
Marco Laudato
Mario Nicodemi
Massimo Bianchi
Mattia Manfredonia
Maurizio Paolillo
Nunzio Itaco
Ofelia Pisanti
Orlando Luongo
Patrizia Vitale
Pietro Santorelli
Raffaele Marotta
Roberto Bastone
Rosa Mele
Salvatore Capozziello
Salvatore Esposito
stefano morisi
Tokuro Fukui
Wolfgang Mueck

Monday 20 February
- 10:20 → 10:30
  
  Opening 10m
  
  Saluti del direttore della sezione di Napoli dell'INFN, Giovanni la Rana, e del direttore del Dipartimento di Fisica "Ettore Pancini", Leonardo Merola.
  
  Speakers: Giovanni La Rana (NA), Leonardo Merola (NA)
- 10:30 → 13:00
  
  The concordance model of cosmology after Planck 2h 30m
  
  I will start by reviewing why we need to abandon the old Hot Big Bang scenario in favor of a new, broadly-defined, inflationary paradigm. I will then argue that, in the absence of quantum mechanics, inflation would not be a viable alternative to the old paradigm and briefly review the mechanism by which a calculable spectrum of cosmological perturbations of quantum origin is generated.
  
  Speaker: Prof. Gabriele Veneziano (Collège de France and CERN)
Tuesday 21 February
- 10:30 → 13:00
  
  Big bang or Big Bounce? 2h 30m
  
  I will first illustrate the successes of the particular implementation of the inflationary idea known as slow-roll inflation. I will then illustrate a possible alternative to slow-roll inflation suggested by string theory. A comparison of the relative merits of those two implementations of the inflationary paradigm will conclude the early-cosmology part of the course.
  
  Speaker: Prof. Gabriele Veneziano (Collège de France and CERN)
Wednesday 22 February
- 10:30 → 13:00
  
  Inhomogeneities and precision cosmology 2h 30m
  
  I will discuss the way in which inhomogeneities in the recent and present Universe may affect the determination of basic cosmological parameters. A new adapted coordinate system simplifies considerably the study of light-like signals propagating in an inhomogeneous Universe. I will illustrate this on the so-called Hubble (redshift vs. distance) diagram claiming that inhomogeneities cannot replace dark energy as an explanation for cosmic acceleration. I will conclude with the amusing example of calculating time-of-flight differences for ultra relativistic particles propagating in a non-homogeneous Universe.
  
  Speaker: Prof. Gabriele Veneziano (Collège de France and CERN)