Cosmology News & Events

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3-form Cosmology

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Speaker
Nelson Nunes (CAUL, Lisbon U.)
Event date
Venue
GAP room
Event type
Seminars

Abstract: Three-forms can give rise to viable cosmological scenarios of inflation and dark energy with potentially observable signatures distinct from standard single scalar field models. When applied to inflation, a three-form can provide a scale invariant scalar perturbations power spectrum and I will discuss the effect on primordial non-gaussianity. Finally I will discuss a

Cosmology

Thomas Metcalf visits Gr@v

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Thomas Metcalf, a graduate student from the University of Edinburgh, is visiting our group from October to December 2013. Thomas is currently working with João Rosa in particle physics and cosmological models of warm inflation.

Cosmology

Introduction to Cosmology

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Speaker
João Rosa
Event date
Venue
GAP room
Ends on
Event type
Courses
This is an introductory course in Cosmology, aimed primarily at Masters and PhD students but open to anyone who would like to know more about the Universe. It will focus mainly on describing the Hot Big Bang paradigm, its mathematical properties and the observational basis on which it stands. The course will be mostly self-contained but some parts of the course will require a basic knowledge of general relativity, quantum field theory and thermodynamics, although the main concepts will be revised.
Cosmology

From the dark ages to dark energy: Cosmology with the next generation of radio telescopesSlides

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Speaker
Mário Santos (Instituto Superior Técnico - CENTRA)
Event date
Venue
GAP room
Event type
Seminars

Abstract: A new generation of radio telescopes with unprecedented capabilities for astronomy and fundamental physics will be in operation over the next few years. I will address some of the possibilities for Cosmology offered by this new generation of telescopes, such as ASKAP, MeerKAT, LOFAR and the future SKA.

Cosmology

QFT on Quantum Bianchi I Space-time

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Speaker
Yaser Tavakoli (Univ. da Beira Interior)
Event date
Venue
GAP room
Event type
Seminars

Abstract: In this talk we discuss the quantum theory of a scalar field on LQC Bianchi I geometry. By focusing on single modes of the scalar field, we show that, evolution of the quantum field on the background quantum space-time leads to a classical effective geometry emerging whose components depend on the quantum geometrical operators.

Cosmology
High Energy Physics

Warm inflation in beyond the Standard Model scenarios

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Speaker
Joao Rosa (U. Edinburgh)
Event date
Venue
GAP room
Event type
Seminars

Abstract: Warm inflation provides an attractive solution to the so-called eta-problem that generically plagues supergravity and string theory models, with additional dissipation damping the inflaton's motion and simultaneously producing radiation during inflation.

Cosmology

n-DBI gravity

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Speaker
Yuki Sato (Nagoya and Niels Bohr Institute)
Event date
Venue
GAP room
Event type
Seminars

Abstract: n-DBI gravity is a gravitational theory introduced in arXiv:1109.1468[hep-th], motivated by Dirac-Born-Infeld type conformal scalar theory and designed to yield non-eternal inflation spontaneously. I explain that any solution of Einstein gravity with a particular curvature property is a solution of n-DBI gravity.

Strong Gravity
Cosmology

General Relativity, Cosmology and Black Holes course

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Speaker
Carlos Herdeiro
Event date
Venue
GAP room
Ends on
Event type
Courses
An extra curricular course on "General Relativity, Cosmology and Black Holes" will run throughout the second semester 2011/12. Only basic knowledge of special relativity and Newtonian gravity will be assumed. By default, sessions will take place every friday at 14H00 in the GAP room. Some lecture notes will be handed out and exercises will be set in every session and solved in the following one.
Strong Gravity
Cosmology
Astrophysics