Lectures on String Theory

Abstract

This is a one semester course on bosonic string theory aimed at beginning graduate students. The lectures assume a working knowledge of quantum field theory and general relativity. Contents: 1. The Classical String 2. The Quantum String 3. Open Strings and D-Branes 4. Introducing Conformal Field Theory 5. The Polyakov Path Integral and Ghosts 6. String Interactions 7. The Low-Energy Effective Action 8. Compactification and T-Duality

210ish pages, lots of figures. These lectures were given in Part III of the Mathematical Tripos at the University of Cambridge. V2 and V3: Typos corrected. Individual chapters can be downloaded from http://www.damtp.cam.ac.uk/user/tong/string.html . The notes on the course webpage will be updated more frequently than those on the arXiv

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• Temperature and chemical potential dependence of the gluon condensate: a holographic study
• From topological to non-topological solitons: kinks, domain walls and Q-balls in a scalar field model with non-trivial vacuum manifold
• M2 to D2 and vice versa by 3-Lie and Lie bialgebra
• Violations of the Null Energy Condition in QFT and their Implications
• Asymptotic safety and quantum gravity amplitudes
• The cosmological constant problem in heterotic-M-theory and the orbifold of time
• Quasi-Local 3D Quantum Gravity : Exact Amplitude and Holography
• Holographic JT gravity with quartic couplings
• Flux-tubes in confining gauge theories with gravitational dual
• Black Holes in String Theory
• Wheeler-DeWitt equation in Null-foliated spacetimes
• Quantum Gravity for Dummies
• Quantum mechanics before the big bang in heterotic-M-theory