📚 Supplementary Resources
Additional video lectures and playlists complementing the main QFT course
This page collects high-quality video lecture series that provide complementary perspectives and deeper dives into specific topics covered in the QFT course. These resources are organized by subject area and can be used alongside the main MIT lectures for enhanced understanding.
How to use these resources: Browse by topic, watch videos that align with your current study, or explore advanced topics at your own pace. All videos are freely available on YouTube.
⚡ Classical Electrodynamics
62 lecturesAdvanced Physics provides a comprehensive treatment of classical electromagnetism from Maxwell's equations through wave propagation, boundary conditions, radiation theory, and transmission lines.
Best for: Understanding the classical limit of QED, reviewing EM fundamentals, and seeing detailed applications of field theory to electromagnetic phenomena.
Connection to QFT: Part I: Electromagnetic Field
View All 62 Classical Electrodynamics Videos →
Maxwell's Equations & Fundamentals (7 lectures)
Video Lecture
Introduction and Equation of Continuity
Foundation of electromagnetic theory
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Video Lecture
Maxwell's Postulate: Displacement Current
The missing piece in Ampère's law
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Video Lecture
Physical Interpretation
Understanding displacement current
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Video Lecture
Illustrations
Examples and applications
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Field Equations - 1
Integral and differential forms
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Field Equations - 2
Derivations and symmetries
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Video Lecture
Field Equations - 3
Complete formulation
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Energy & Momentum in EM Fields (8 lectures)
Video Lecture
Poynting Theorem - 1
Energy conservation
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Video Lecture
Poynting Theorem - 2
Applications
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Video Lecture
Poynting Vector - 1
Energy flux
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Poynting Vector - 2
Calculations
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Video Lecture
Poynting Vector - 3
Advanced applications
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Video Lecture
Maxwell Stress - 1
Momentum in fields
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Video Lecture
Maxwell Stress - 2
Force and pressure
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Video Lecture
Radiation Pressure
Pressure from waves
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Wave Propagation (10 lectures)
Video Lecture
Waves in Free Space - 1
Wave equation
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Video Lecture
Waves in Free Space - 2
Polarization
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Video Lecture
Isotropic Dielectric - 1
Material effects
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Video Lecture
Isotropic Dielectric - 2
Refractive index
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Anisotropic Dielectric - 1
Birefringence
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Video Lecture
Anisotropic Dielectric - 2
Double refraction
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Video Lecture
Conducting Medium - 1
Skin depth
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Video Lecture
Conducting Medium - 2
Complex index
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Video Lecture
Conducting Medium - 3
Metals
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Video Lecture
Interaction with Matter
Absorption, scattering
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Boundary Conditions & Optics (8 lectures)
Video Lecture
BC for D & B
Discontinuities
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Video Lecture
BC for E & H
Components
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Video Lecture
Reflection & Refraction
Snell's law
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Video Lecture
Fresnel - 1
Amplitudes
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Video Lecture
Fresnel - 2
Polarization
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Video Lecture
R & T Coefficients
Energy conservation
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Video Lecture
Brewster's Law
Polarization
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Video Lecture
Total Internal Reflection
Evanescent waves
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Scattering (3 lectures)
Video Lecture
Scattering Cross-section
Quantifying scattering
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Video Lecture
Thomson Scattering - 1
Classical scattering
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Video Lecture
Thomson Scattering - 2
Cross sections
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Electrodynamics of Moving Charges (15 lectures)
Video Lecture
Potentials - 1
Time-varying sources
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Video Lecture
Potentials - 2
Gauge transformations
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Video Lecture
Retarded Potentials - 1
Causality
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Video Lecture
Retarded Potentials - 2
Green's functions
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Video Lecture
Liénard-Wiechert - 1
Moving charge
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Video Lecture
Liénard-Wiechert - 2
Derivation
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Video Lecture
Uniform Motion - 1
Lorentz fields
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Video Lecture
E Field in Motion
Field transformation
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Video Lecture
B Field in Motion
B field transform
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Video Lecture
Uniform Motion - 4
Complete structure
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Video Lecture
Arbitrary Motion - 1
Acceleration
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Arbitrary Motion - 2
Velocity fields
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Video Lecture
Arbitrary Motion - 3
Radiation zones
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Video Lecture
Radiation - 1
Larmor formula
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Video Lecture
Radiation - 2
Angular distribution
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Dipole Radiation (5 lectures)
Video Lecture
Oscillating Dipole
Introduction
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Video Lecture
Potentials
Vector & scalar
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Video Lecture
Magnetic Field
Near & far field
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Video Lecture
Electric Field
Field structure
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Video Lecture
Power Radiation
Radiated power
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Special Topics (6 lectures)
Video Lecture
Lorentz Force
Force and potentials
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Video Lecture
Uniform Fields
Gauge choices
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Video Lecture
Transmission Line - Intro
Distributed circuits
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Video Lecture
Line Equations
Telegrapher equations
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Video Lecture
Reflection
Impedance matching
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Video Lecture
Standing Waves
SWR
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📐 Tobias Osborne: QFT 2016
18 lecturesTobias Osborne (Leibniz Universität Hannover) provides a rigorous, mathematically detailed treatment of QFT with strong emphasis on path integrals and gauge theories. Perfect for students wanting a second rigorous perspective alongside MIT 8.323.
Best for: Rigorous study, path integral methods, alternative derivations, gauge field theory, and comprehensive treatment of the Dirac field.
Foundations (Lectures 1-7)
Classical field theory, symmetries, quantization, causality
7 lecturesInteractions (Lectures 8-13)
Feynman diagrams, S-matrix, perturbation theory
6 lecturesFermions (Lectures 14-18)
Dirac field, quantization, QED
5 lectures🎥 DrPhysicsA: Visual QFT
13 lecturesDrPhysicsA (Dr. Andrew) provides exceptionally clear, visual explanations of particle physics and quantum field theory. Perfect for building conceptual understanding before diving into mathematical formalism.
Best for: Visual learners, conceptual introductions, understanding Standard Model structure, and connecting mathematical formalism to physical intuition.
Standard Model Overview
Complete introduction to fundamental particles and forces
1 lectureQED & QCD
Particle interactions through gauge bosons
3 lecturesParticle Physics Series
Operators, gauge theory, Higgs, supersymmetry
6 lectures🎓 QFT Deep Dive: Klein-Gordon & Dirac
27 lecturesComprehensive QFT lecture series covering the Klein-Gordon equation, Klein paradox, Dirac equation derivation, gamma matrix mastery, Lorentz covariance, field quantization, and propagators. Essential for understanding relativistic quantum mechanics and the foundations of QFT.
Best for: Step-by-step derivations, understanding gamma matrices, Klein-Gordon and Dirac field theory, connecting Peskin & Schroeder textbook to visual explanations.
Connection to QFT: Part I: Scalar Fields, Part I: Dirac Field, Part II: Propagators
View All 28 QFT Deep Dive Videos →
Klein-Gordon Equation (3 lectures)
Video Lecture
Lecture 1: Klein-Gordon Equation
Single particle introduction
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Video Lecture
Lecture 2: Klein Paradox
Transmission/reflection from potential barrier
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Video Lecture
Why We Need QFT
Derivation of Klein-Gordon Lagrangian density
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Dirac Equation Derivation (5 lectures)
Video Lecture
Lecture 3: Deriving the Dirac Equation
And gamma matrices!
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Video Lecture
Lecture 5: Finding Antimatter
Spin & probability current, Dirac hole theory
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Video Lecture
Dirac Equation in QFT
Field theory formulation
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Video Lecture
Dirac Implies Klein-Gordon
Proving the connection
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Video Lecture
Free-Particle Solutions
All steps explained
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Mastering Gamma Matrices (7 lectures)
Video Lecture
Lecture 6: Gamma Matrices Part 1
Introduction and properties
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Video Lecture
Lecture 7: Master the Gamma Matrices
Advanced techniques
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Video Lecture
16 Gamma Matrices: Linear Independence
Proof + inverse matrices
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Video Lecture
Any 4x4 Matrix in Gamma Matrices
Complete representation proof
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Video Lecture
Commuting with ALL Gamma Matrices
Proportional to unit matrix proof
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Video Lecture
All Representations Equivalent
Pauli's fundamental theorem
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Video Lecture
Spin Sum Identity
Useful identity for Dirac field
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Lorentz Transformations & Covariance (2 lectures)
Video Lecture
Lecture 8: Lorentz Transformation
Introduction to Lorentz invariance
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Video Lecture
Lecture 9: Covariance of Dirac Equation
Lorentz invariance proof
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Weyl Spinors (1 lecture)
Video Lecture
Weyl Spinors & Weyl Equations
Introduction in QFT
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Klein-Gordon Field Quantization (6 lectures)
Video Lecture
Quantizing Klein-Gordon as Harmonic Oscillators
Fully explained
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Video Lecture
Vacuum Energy & UV Divergence
Why QFT fails (and how to fix it)
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Video Lecture
Noether's Theorem & Momentum
Klein-Gordon field momentum
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Video Lecture
Interpretation & Bose-Einstein
Statistics of the Klein-Gordon field
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Video Lecture
Causality and Propagators
Free Klein-Gordon QFT
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Video Lecture
Klein-Gordon & Feynman Propagators
Peskin & Schroeder Eq. 2.54 & 2.56 explained
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Complex Scalar Field (2 lectures)
Video Lecture
Hamiltonian for Complex Scalar
Peskin & Schroeder 2.2a
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Video Lecture
Charge of Complex Scalar Field
Peskin & Schroeder 2.2c solution
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Dirac Field Hamiltonian (1 lecture)
Video Lecture
Deriving the Hamiltonian for Dirac Field
Complete derivation
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Mathematical Techniques (1 lecture)
Video Lecture
Feynman's (almost) impossible integral
Advanced integration techniques used in QFT
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🌀 EigenChris: Spinors for Beginners
25 lecturesEigenChris provides an exceptionally visual, geometric introduction to spinor theory - essential mathematics for understanding the Dirac field and fermions in QFT. From Jones vectors and Pauli matrices through Clifford algebras to the Dirac equation.
Best for: Understanding spinors geometrically, preparing for Dirac field study, learning Clifford algebras, and connecting group theory to physics.
Introduction (1-10)
Pauli spinors, SU(2), double cover
10 lecturesClifford Algebras (11-15)
Geometric algebra, spin groups
5 lecturesLie Theory (16-20)
Representations, Lorentz group
5 lecturesQFT (21-25)
Dirac, Klein-Gordon, Maxwell
5 lectures