Free resources on theoretical physics.

A collection of high quality video lectures and notes. (Last revised: April, 2019)

[Home page] The following is a collection of high quality video lectures, and accompanying notes, on theoretical physics. All of the resources are freely available on the Web. Every resource has been reviewed, and should allow you to make "quick" progress in fundamental physics. It should be possible to more or less work your way downwards through the list of material. You should find the additional articles very helpful in developing your understanding.

If you have successfully completed a college course in mathematics / physics you could definitely work your way through the material on this website in just a few years. You would then be able to follow progress in fundamental physics at CERN, LIGO etc.

Thank you for visiting my website. If you would like to get in touch, please send me an email [email protected].

Classical Mechanics & Special Relativity

Classical Mechanics, Jacob Linder

Special Relativity, Leonard Susskind

Lectures on Classical Dynamics, David Tong | Notes | PDF

The Feynman Lectures on Physics Volume I & II

Quantum Mechanics

Quantum Physics I, Barton Zwiebach, Video Lectures & Lecture Notes

Quantum Mechanics, Professor J.J. Binney | Notes

Mastering Quantum Mechanics, Barton Zwiebach [1], [2] & [3] Lecture Notes

The Feynman Lectures on Physics Volume III

Advanced Quantum Mechanics

Advanced quantum theory, Tobias Osborne

Quantum Mechanics II, Prof. Dr. Namık Kemal PAK

The Feynman Lectures on Physics Volume III

Mathematical Physics

Multivariable Calculus, Edward Frenkel

Differential Equations and Linear Algebra, Gilbert Strang

Physical Mathematics (15), Kevin Cahill | Physical Mathematics (16), Kevin Cahill | Physical Mathematics (17), Kevin Cahill

Quantum Field Theory

Particle Physics 1: Basic Concepts, Leonard Susskind

Quantum Field Theory, David Tong | Notes

Quantum Field Theory, Tobias Osborne

Introduction to Quantum Field Theory, Matthew Schwartz. This book was previously available for download on the website.

If you would like to purchase a book: I can also highly recommend Field Quantization by Walter Greiner et al. & Gauge Theories in Particle Physics (Volume I From Relativistic Quantum Mechanics to QED) by I J R Aitchison and A J G Hey

Advanced Quantum Field Theory

Advanced quantum field theory: the theory of elementary interactions, Tobias Osborne

Quantum Field Theory (HEP-QFT), Prof. S. Randjbar-Daemi, ICTP Postgraduate Diploma Programme 2017-2018

Quantum Field Theory (Fall 2012), Kevin Cahill | Lecture Notes | Kevin Cahill's Website

The following book along with solutions may be helpful for reference: Quantum Field Theory, Mark Srednicki. This book was previously available for download on the website.

Introduction to conformal field theory, Tobias Osborne

Standard Model of Particle Physics

Particle Physics, Alan Martin, African Summer Theory Institute, in 2004. | Q&A | Slides

Introduction to High Energy Physics, Paul Langacker

The Standard Model, Paul Langacker | Lecture Notes

The Future of Particle Physics, David Gross

General Relativity & Cosmology

General Relativity, Leonard Susskind

General Relativity, Neil Turok

The Early Universe, Alan Guth | More information.

Lecture Notes on General Relativity, Sean M. Carroll | PDF


Particle Physics 3: Supersymmetry and Grand Unification, Leonard Susskind

Explorations in Particle Theory, Ben Allanach | Notes

Cambridge Lectures on Supersymmetry and Extra Dimensions, Fernando Quevedo

Supersymmetry and Gauge Theory, Neil Lambert

Supersymmetry, David Shih

String Theory

String Theory, Barton Zwiebach

Lectures on String Theory, David Tong

An Introduction to String Theory, Kevin Wray

Introduction to String Theory, Neil Lambert | Notes | Exercises

String Theory and Holographic Duality, Prof. Hong Liu | Notes

Introduction to Superstrings and M-Theory, Michio Kaku (Free download from Springer)

Strings, Conformal Fields, and M-Theory, Michio Kaku (Free download from Springer)

If you would like to purchase a book: I can also highly recommend A First Course in String Theory by Barton Zwiebach & Supersymmetric Gauge Field Theory and String Theory by D. Balin and A. Love

String theory to the rescue, Joe Polchinski

Quantum Gravity / Loop Quantum Gravity

Space and Time in Loop Quantum Gravity, Carlo Rovelli

Quantum Gravity, Renate Loll

Quantum Gravity, Carlo Rovelli

Covariant Loop Quantum Gravity, Carlo Rovelli, Francesca Vidotto

Theoretical Physics websites:

The Feynman Lectures on Physics

Richard Feynman’s Messenger Lecture Series

The Theoretical Minimum

David Tong: Lectures on Theoretical Physics

The collected papers of Albert Einstein

2015 - General Relativity’s Centennial


Dear Dr. B: How come we never hear of a force that the Higgs boson carries?, Sabine Hossenfelder

You Should Love (or at least respect) the Schrödinger Equation, Sean M. Carroll

Alice and Bob Meet the Wall of Fire, Jennifer Ouellette

Why Stephen Hawking’s Black Hole Puzzle Keeps Puzzling, Jennifer Ouellette

Why Is There Something, Rather Than Nothing?, Sean M. Carroll

QCD Made Simple, Frank Wilczek

Screams for Explanation: Finetuning and Naturalness in the Foundations of Physics, Sabine Hossenfelder

Space and Time in Loop Quantum Gravity, Carlo Rovelli

Parallel Universes, Max Tegmark


Thinking for Oneself, Arthur Schopenhauer:

How to Live on Twenty-Four Hours a Day, The Desire to Exceed One's Programme, Arnold Bennett:

First transmitted in 1974, Michael Parkinson's guest is Dr Jacob Bronowski, the presenter and writer of the 1973 documentary series, The Ascent of Man

A Mathematician's Apology, G. H. Hardy

Pure Mathematics:

A Course of Pure Mathematics, G. H. Hardy

The Theory of Functions, E. C. Titchmarsh

A Course of Modern Analysis, E. T. Whittaker & G. N. Watson

Reviewing .....

Symmetries and groups, Hugh Osborn

1951 Lectures on Advanced Quantum Mechanics, Freeman J. Dyson

Notes from Sidney Coleman's Physics 253a, Sidney Coleman

Grand Unification and the Standard Model, Paul Langacker

Introduction to the Standard Model and Electroweak Physics, Paul Langacker

Quantum Theory, Groups and Representations: An Introduction, Peter Woit

A Supersymmetry Primer, Stephen P. Martin

Superspace, or One thousand and one lessons in supersymmetry, S.J. Gates Jr, M.T. Grisaru, M. Rocek, W. Siegel

D-Brane Primer, Clifford V. Johnson | PDF

Introduction to Superstring Theory, John H. Schwarz

Introduction to Supersymmetry, Joseph D. Lykken

Introduction to String Theory and D–Branes, Clifford V. Johnson

Memories of a Theoretical Physicist, Joseph Polchinski

Why Trust a Theory?

Who to follow:

Peter Woit | Sean Carroll | Sabine Hossenfelder

You can also a find a large collection of curated videos on my youtube channel. If you have a physics question you can ask it me on Quora.

Thank you for visiting my website. If you would like to get in touch, please send me an email [email protected].

"We must know, we will know." David Hilbert