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Free Theoretical Physics Books

Basic Physics
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Theoretical Physics
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Modern Physics
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Condensed Matter
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Atomic Physics
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Particle Physics
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Nuclear Physics
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Quantum Physics
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Quantum Field Theory
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Quantum Mechanics
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Electricity&Magnetism
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ElectroDynamics
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Solid State Physics
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Superconductivity
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Mathematical Physics
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Plasma-Physics
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Thermodynamics
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Fluid Mechanics
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Mechanics
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Stastical Mechanics
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Continuum Mechanics
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Classical Mechanics
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Chemical Physics
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Vibration&Waves
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Conservation Laws
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Computational Physics
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Medical Physics
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Optics
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Dynamics
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Relativity
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Astronomy
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BioPhysics
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GeoPhysics
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Psychophysics
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Kinetic Theory
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Statistical Physics
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This section contains free e-books and guides on Theoretical Physics, some of the resources in this section can be viewed online and some of them can be downloaded.

Theoretical Physics Books
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Eight Lectures on Theoretical Physics

PDF | 99 Pages | English
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.

 
String Theory for Undergraduates

Online | NA Pages | English
This note covers the following topics: Lorentz transformations, Light-cone coordinates, Energy and momentum, Compact dimensions, orbifolds, Relativistic electrodynamics, Gauss' law, Gravitation and Planck's length, Gravitational potentials, compactification, and large extra dimensions, area formula for spatial surfaces, Relativistic strings: Nambu-Goto action, equations of motion and boundary conditions, Periodicity conditions for the motion of closed strings, The formation of cusps, Conserved currents in E&M, Conserved charges in lagrangian mechanics, Closed strings and Heterotic string theory.

 
Concepts in Theoretical Physics

Online | NA Pages | English
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

 
Lectures on String Theory

Online | NA Pages | English
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

 
Introduction To String Field Theory (PDF 247p)

PDF | 247 Pages | English
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.

 
Introduction to String Theory (PDF 79p)

PDF | 79 Pages | English
This book covers the following topics: Strings in QCD, The classical string, Open and closed strings, Quantization, Lorentz invariance, Interactions and vertex operators, BRST quantization, The Polyakov path integral, T-Duality, Complex coordinates, Fermions in strings, The GSO Projection, Zero modes.

 
Electricity, Optics and Modern Physics

Online | NA Pages | English
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, Faraday's law and Nuclear energy.

 
The Meaning of Einstein's Equation

Online | NA Pages | English
This is a brief introduction to general relativity, designed for both students and teachers of the subject. It mainly deals with Einstein's Equation and Some Consequences.

 
Does mass really depend on velocity, Dad
Einstein and the existence of atom

Online | NA Pages | English
The background of Einsteinís 1905 Brownian motion paper is discussed, including the work of people like Brown, Boltzmann, and Bachelier. The paper is discussed as is its aftermath. The question is raised as to whether atoms exist.

 
Classical theoretical physics
What is String Theory [PDF 153p]
Fields [PDF 885p]
Introduction to Superstring Theory [PDF 244p]
Theory of Solids I
Theory of Solids II
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