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Lectures on String Theory
These lecture notes provide a detailed introduction to the bosonic string and conformal field theory, aimed at "Part III" (i.e. masters level) students. The full set of lectures notes can be downloaded here and weigh in at around 200 pages. Individual sections can be downloaded below. Last updated February 2012.This covers the following: The Classical String, The Quantum String, Open Strings and D-Branes, Introducing Conformal Field Theory, Path Integrals and Ghosts, Scattering Amplitudes, Low Energy Effective Actions, Compactification and T-Duality
Author(s): David Tong, Cambridge university
NA Pages 
Kadath a spectral solver for theoretical physics
This note contains below topics, Setting the geometry, Spectral expansion, Setting equations, Solving the system, User interface, Test problems, Perspectives.
Author(s): Philippe Grandclement
51 Pages
Theoretical Physics Reference Ondrej Certik
The Theoretical Physics Reference is an attempt to derive all theoretical physics equations from the general and special relativity and the standard model of particle physics.The topics in this pdf include nbsp Introduction, Contributors, Mathematics, Classical Mechanics, Special and General Relativity, Classical Electromagnetism, Thermodynamics and Statistical Physics, Fluid Dynamics, Quantum Field Theory and Quantum Mechanics.
Author(s): Ondrej Certik
448 Pages
MPhys Option in Theoretical Physics
This note covers the following topics: Path Integrals in Quantum Mechanics, Stochastic Processes and Path Integrals, Statistical mechanics in one dimension, Classical Field Theory , Canonical Quantization, Interacting Quantum Fields, Path Integrals in Quantum Field Theory, Many-Particle Quantum Systems, Phase Transitions.
Author(s): John Chalker and Andre Lukas
113 Pages
Eight Lectures on Theoretical Physics
This note covers the following topics Reversibility and Irreversibility, Thermodynamic States of Equilibrium in Dilute Solutions, Atomic Theory of Matter, Equation of State for a Monatomic Gas, Heat Radiation and Electrodynamic Theory, Heat Radiation. Statistical Theory, General Dynamics. Principle of Least Action, Principle of Relativity.
Author(s): Max Planck
99 Pages
Concepts in Theoretical Physics
These lectures provide bite sized introductions to a handful of topics in theoretical physics, aimed at first year undergraduates. They were given from 2008 to 2011. Presentations can be downloaded below.The lecture notes can be downloaded in both PDF and PS formats
Author(s): David Tong, Cambridge university
NA Pages
Introduction To String Field Theory PDF 247p
This book covers the following topics: General light cone, General BRST, General gauge theories, Particle, Classical mechanics, Light-cone quantum mechanics, BRST quantum mechanics, Graphs, BRST field theory, Light-cone field theory and Gauge-invariant interactions.
Author(s): Warren Siegel
247 Pages
Electricity Optics and Modern Physics
This note explains the following topics Electric fields, Electric forces, Electromagnetic waves, Geometical optics, Gauss law, Diffraction and polarization, Interference of light, Capacitance, Current and resistance, Magnetic fields, Inductance, Faradays law and Nuclear energy.
Author(s): Georgia State University
NA Pages
This note explains the following topics: String Basics, Closed strings,Open strings,Modes, gravitons,Interactions,Perturbation theory, D-branes, Superstrings, Extra dimensions, Kaluza-Klein theory, String duality, M-theory, Black holes.
Author(s): John M. Pierre
NA Pages