CTN High-Energy Postgraduate Meetings

Meeting 1

On 02/12/13
Speaker: Hamid Afshar
Title: Entanglement Entropy I
Abstract: We will review computation of entanglement entropy in 2d conformal field theories.

 

Meeting 2

On 09/12/13
Speaker: Souvik Banerjee
Title: Entanglement Entropy II : Holography, Entanglement and Holographic Entanglement
Abstract: The talk will be divided into three parts - each of approximately 30 mins duration.
The first part will deal with an "intuitive' sketch of holography and its application. The second part will be a brief review of entanglement entropy and its properties with a briefer recap of the scheme Hamid presented in gory details in his talk. In the final part I shall discuss about the holographic proposal to compute entanglement entropy and if time permits, the justification of the same given by Maldacena in a recent paper.
 

Meeting 3

On 13/01/14
Speaker: Wout Merbis
Title: Constraint Hamiltonian Dynamics
Abstract: Following Blagojevic's book I will present the Dirac procedure of analyzing the physical degrees of freedom and gauge symmetries of a constraint Hamiltonian system. The analysis will be general, leaving a systematic treatment of asymptotic symmetries for next week.
 

Meeting 4

On 24/01/14
Speaker: Wout Merbis (Continuation of the previous talk)
Title: Asymptotic Symmetries in Three Dimensional Gravity

Abstract: Last week we discussed the Dirac procedure of analyzing constraint Hamiltonian systems. This week we will work out the example of Three Dimensional gravity with a cosmological constant. We follow the Dirac procedure and show that the theory is pure gauge an does not propagate local degrees of freedom. Afterwards, we show how the presence of a boundary together with non-trivial boundary conditions generate an asymptotic symmetry algebra which we compute in the case of pure 3D gravity. We will also remark on the relation to Chern-Simons gauge theories.

 

Meeting 5

On 10/02/14
Speaker: Marioto Galante
Title: Quantization of a field in a curved space-time
Abstract: Not available
 

Meeting 6

On 24/02/14
Speaker: Marija Kovacevic
Title: Higher Spins
Abstract:  I will give a small introduction about the higher spins in the first part and will comment mostly on the paper 1109.0382 later.

Meeting 7A

On 10/03/14
Speaker: Lorena Parra
Title: Supersymmetry, an introduction
Abstract: I will provide a brief introduction to supersymmetry, the topics that I will try to cover will be the free chiral supermultiplet, interactions of chiral multiplets, Lagrangians for gauge multiplets and supersymmetic gauge interactions.

 

Meeting 7B

On 17/03/14
Speaker: Lorena Parra (Continuation of the previous talk)
Title: Supersymmetry, an introduction
Abstract: I will provide a brief introduction to supersymmetry, the topics that I will try to cover will be the free chiral supermultiplet, interactions of chiral multiplets, Lagrangians for gauge multiplets and supersymmetic gauge interactions.
 

Meeting 8

On 07/04/14
Speaker: Thomas Zojer
Title:Short intro to super-space/-fields
Abstract:I will introduce the concept of super-space and super-fields, i.e. fields that depend not only on space-time coordinates x but also on fermionic coordinates. Then i will show how to construct multiplets in component formulation, i.e. how to obtain the form that one (people not living in super-space) normally uses. All formulas are based on (chapter 2 of) the super-space book by Gates, Grisaru, Rocek and Siegel (hep-th/0108200 ). (Because their conventions are weird in some places, and because its fun to change things whenever you can I will use slightly different notation.)
 

 

Meeting 9

On 30/04/14

Speaker: Sjoerd de Haan

Title:  Vierbein formulation of general relativity

Abstract: The Einstein-Hilbert action of general relativity is a second order differential of the metric. An equivalent formulation describes general relativity in terms of two fields called the vierbein and the spin connection.There are several situations in which it can be an advantage to work with the vierbein and the spin connection instead of the metric:

1) Fermions can be coupled in a natural way to general relativity in the vierbein formalism.

2) The mass term of the de Rham-Gabadadze-Tolly model for massive gravity can be expressed in terms of vierbeins in a natural way.

3) General relativity in three dimensions can be expressed as Chern-Simons theory of the dreibein and the spin connection.

4) For many geometries, the Riemann tensor can be calculated from the vierbein more easily then from the metric.

The goal of this lecture is to explain the form of general relativity in the vierbein formulation. We start replacing the metric by the vierbein and the spin connection. In order to reformulate the Einstein-Hilbert action, all we have to do is to rewrite the Riemann curvature tensor in terms of these two fields. We end with an expression for the cosmological constant in terms of the vierbein.

 

Meeting 10

On 12/05/14

Speaker: Marco Scalisi

Title:  An introduction to Inflation: lecture #1

Abstract: After a short review of the physics of the FRW space-times, we will presents the shortcomings of the standard big bang  cosmological model. Then, we will introduce a simple and powerful way to solve such issues, namely the inflationary paradigm.

 

Meeting 11

On 19/05/14

Speaker: Marco Scalisi

Title:  An introduction to Inflation: lecture #1

Abstract: We recap the main points of the first lecture and focus specifically on the two most famous shortcomings of the Standard Model of cosmology, namely the Flatness problem and the Horizon problem. We introduce the inflationary paradigm together with its dynamical implementation, the so-called “slow-roll” inflation, in terms of a scalar field.  The latter will lead us naturally to a classification of inflationary models depending on the field range and to a discussion on the well-known Lyth bound.

Meeting 12

On 23/06/14

Speaker: Souvik Banerjee

Title : Thermodynamics of AdS Black Holes (And gauge theory duals).

Abstract : I shall derive thermodynamics of AdS black holes from the action principle and discuss the phase transitions therein.

If time permits, I shall talk about some effective gauge theory models that capture those transitions and related physics at least near critical points.

 

 

 

 

 

 

Person whom you have to contact (in case you are willing to give a talk)/ who will contact you (in case you are not so willing!)

Marco Scalisi