Perturbation theory (quantum mechanics)

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Physics
Quantum field theory
Quantum electrodynamics

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Related lectures (32)

Time-Independent Perturbation Theory

Covers the theory of time-independent perturbations and the harmonic oscillator.

Optimal Linear Response: Stochastic Dynamical Systems

Explores optimal linear response for stochastic dynamical systems, addressing perturbations and mixing rate optimization.

Analytic Structure of Green's Function

Explores the analytic structure of Green's function, bound and scattering states, and perturbation theory.

Connected Diagrams: Free Energy and Semiclassical Propagator

Explains free energy as a sum over connected diagrams and the semiclassical propagator in quantum field theory.

Renormalization Group: Basic Structure and Counterterms

Covers the Renormalization Group and perturbation theory breakdown.

Quantum Perturbation Theory: Time-Dependent Part 1

Covers the basics of time-dependent perturbation theory in quantum mechanics.

Instanton Prefactor and Zero Mode

Explores instantons in quantum field theory, focusing on the instanton prefactor and the role of the zero mode.

Soft de Sitter Effective Theory

Explores Soft de Sitter Effective Theory, In-In perturbation theory, scalar fields, power counting interactions, and dynamical dimensional regularization.

Nonlinear Susceptibility: Perturbative Expansion

Explores nonlinear optics with two-level systems, perturbative expansion, and the dressed-state picture in the quantized field.

Spin relaxation mechanism

Explores spin relaxation mechanisms, perturbation theory, relaxation rates, momentum conservation, phonon drag, electron-magnon interactions, and symmetries.

Borel Resummation: Techniques and Applications

Covers the theory and applications of Borel resummation in physics.

Scattering Theory Overview

Explores scattering theory, S-matrix, T-product, perturbation theory, and Schrödinger equation solutions.

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