Index Concordia

Scattering amplitudes à la Alday-Maldacena (II)

Posted in AdS/CFT, Gauge Theory, String Theory by Index Guy on June 20, 2008

Continuing what we started before, I would like to discuss the four-point scattering amplitude using AdS/CFT methods.

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Scattering amplitudes à la Alday-Maldacena (I)

Posted in AdS/CFT, Gauge Theory, String Theory by Index Guy on June 19, 2008

I would like to summarize the work of Luis Fernando Alday and Juan Maldacena on gluon scattering amplitudes at strong coupling via AdS/CFT methods. I will follow mostly (i.e. verbatim) these two preprints from the arXiv:

0804.0951 and 0705.0303

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Very basic stuff on AdS/CFT

Posted in AdS/CFT, Gauge Theory, Supergravity by Index Guy on June 10, 2008

We continue our discussion (started here) of very basic notions in the study of the AdS/CFT correspondence. I have followed very closely the following review:

arXiv:0711.4467

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Very basic stuff on strings

Posted in AdS/CFT, Gauge Theory, String Theory by Index Guy on June 5, 2008

I would like to share some of the stuff I learned from

arXiv:0711.4467

about basic notions from string theory and the AdS/CFT correspondence. The review is focused on gauge/gravity dualities and mesons, but it contains a nice overview of some concepts to bring readers up to speed. Some stuff bellow might be verbatim; most comes from the reference mentioned above.

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What Alday & Maldacena did (I)

Posted in AdS/CFT, Gauge Theory, Paper discussion, Quantum Field Theory by Index Guy on June 3, 2008

Let us start with the work of Alday and Maldacena on scattering amplitudes of gluons at strong coupling (arXiv:0705.0303). I will summarize what I got from reading the first few pages below, but most of it is really verbatim from the preprint. For future references I will include some questions between square brackets that I need to answer. Section names headline summary of the corresponding preprint. Yes, I even summarized the “Abstract”. I know… 🙂

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Notes on BRST

Posted in Classical Mechanics, Gauge Theory, References by Index Guy on May 10, 2008

Just found a nice set of lectures notes on BRST quantization on the arXiv:

arXiv:hep-th/0201124

Will try to go through it later.