Author Archives: kiwinerd

Lecture 26 Mar

Posted on 2008/03/25 by kiwinerd

Today we discuss BPS states, the Bogomolnyi bound, Kaluza-Klein reduction on the circle, and S-duality.  Here are my notes (BPS states and S Duality).

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Replacement Lecture

Posted on 2008/03/25 by kiwinerd

We will have an extra (replacement) lecture on Monday, March 31st, at 2pm Location TBA.

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No Lecture 21.Mar

Posted on 2008/03/20 by kiwinerd

Hi everyone, Suddenly I realized that 21.Mar is a holiday … it’s Good Friday in the Christian calendar (which we apparently celebrate as a country and as a university). I’d like to reschedule the missing hour. Please expect an email … Continue reading →

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Homework 4

Posted on 2008/03/18 by kiwinerd

Note: since you all found the first three homeworks relatively easy, this one (and the last) will be a bit longer and a bit tougher… New due date: Mon.31.Mar before 18:00 (6pm). Question 1A Separated Dp-branes and an Op-plane Z14.4 … Continue reading →

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Lecture 19 Mar

Posted on 2008/03/14 by kiwinerd

Here are my [overcomplete] notes: The [super]string density of states and the Hagedorn temperature The Superstring Duality Web, Part 1: Why strings carry NS-NS two-form charge while Dp-branes carry R-R (p+1)-form charge. Identifying conserved charges.

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Lecture 14 Mar

Posted on 2008/03/12 by kiwinerd

Today we talked about material Z-bach focuses on in Chapter 17. We explained in detail T-duality on closed and open strings propagating on R1,8 x S1, flat spacetime times a circle. The important bits were: (a) solving the string wave … Continue reading →

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Lecture 12 Mar

Posted on 2008/03/07 by kiwinerd

Based on material in Chapter 14 of Zwiebach, we wrapped up the story of the mass of fundamental open strings stretched between stacks of Dp and Dq branes (StringsBetweenDpAndDqBranes). We also gave a first introduction to T-duality (IntroducingTduality). Before Friday’s … Continue reading →

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How to find Prof Peet

Posted on 2008/03/07 by kiwinerd

If you need to find me, please check my approximate weekly timetable online and  identi.ca feed.

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Topic schedule post-break

Posted on 2008/03/07 by kiwinerd

20080227 (W): Building the superstring state space in light-front gauge. Closed superstrings. Open superstrings. Neveu-Schwarz (NS) and Ramond (R) sectors. Dilaton, Kalb-Ramond field. [Z.Ch.13] 20080229 (F): The gamma matrix algebra and Spinors in diverse dimensions D. The Fock space representation. … Continue reading →

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Lecture 07 Mar

Posted on 2008/03/02 by kiwinerd

Today’s focus was how to calculate the mass of open strings stretched between Dp-branes. Specifically, we worked out the cases of 1 Dp-brane, which has a U(1) Maxwell field (with some transverse scalars) living on it; N Dp-branes, which have … Continue reading →

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