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# Monthly Archives: August 2019

## Generating functional for phi-4 theory

Generating functional for phi-4 theory

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## Perturbation expansion for functional integral – motivation

Perturbation expansion for functional integral – motivation

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## Propagator for free massive vector field

Propagator for free massive vector field

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## Transition amplitude for forced harmonic oscillator

Transition amplitude for forced harmonic oscillator

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## Wick’s theorem and path integrals

Wick’s theorem and path integrals

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## Lagrangian for gaussian integral

Lagrangian for gaussian integral

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## Scalar field theory with source field

Scalar field theory with source field

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