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# Quantum Fields and Strings

This series consists of talks in the area of Quantum Fields and Strings.

## Seminar Series Events/Videos

Currently there are no upcoming talks in this series.

## Quantum Horizons of the Standard Model Landscape

Jeudi fév 08, 2007
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Mardi fév 06, 2007
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The duality between theories of quantum strings and Yang-Mills gauge theories, in particular the AdS/CFT conjecture, has over the years given rise to many important physical insights. Recently, the realization that both sides of the duality, in certain limits, can be be described by integrable systems has lead to a good deal of progress. In this talk we will review the construction of these integrable structures and their usefulness in understanding strings in curved backgrounds/strongly coupled gauge theories.

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## Hagedorn divergences and Tachyon potential

Mardi jan 30, 2007
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TBA

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## Einstein geometry and conformal field theory

Mardi nov 28, 2006
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TBA

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## Black Hole - String Transition and Rolling D-brane

Vendredi nov 24, 2006
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The exact boundary states for the rolling D-brane solution in two-dimensional black hole systems will be presented.I will study the physical significance of the solution in relation to the tachyon-radion correspondence\" and the black hole - string transition\". When the alpha\' corrections become larger, when at the same time the Hawking temperature coincide with the Hagedorn temperature, the phase transition occurs and the physics changes drastically. It also suggests the universal feature of the decaying D-brane and its failure in the strong quantum regime.

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## Problems with Computing Jet Quenching From AdS/CFT

Mardi nov 21, 2006

I will discuss some ambiguities involved in using the AdS/CFT correspondence
to calculate the ultra-relativistic jet quenching parameter for quarks moving in
an N=4 super Yang-Mills thermal bath. Along the way, I will investigate the behavior of various string configurations on a five-dimensional AdS black hole
background.

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## Massless 4D gravitons from 5D Asymptotically AdS spacetime

Mardi nov 07, 2006
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## A Microscopic Limit on Gravitational Waves from D-brane Inflation

Jeudi oct 19, 2006
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TBA

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## Kahler Metrics for Chiral Matter in Calabi-Yau String Compactifications

Jeudi oct 19, 2006
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In string compactifications, Kahler metrics for chiral matter fields are an essential prerequisite for the computation of soft supersymmetry breaking terms. I describe new techniques for computing these in Calabi-Yau string compactifications. This involves deducing the modular behaviour of the Kahler metric from that of the physical Yukawa couplings. Using these techniques I derive Kahler metrics for both KKLT and large-volume models. For the latter case, I discuss two applications.

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## How a black hole emerges from a pure state

Mardi oct 17, 2006
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