Quartic Interaction
This article refers to a type of self-interaction in scalar field theory, a topic in quantum field theory. Other types of quartic interactions may be found under the topic of four-fermion interactions. A classical free scalar field φ satisfies the Klein-Gordon equation. If a scalar field is denoted φ, a quartic interaction is represented by adding a potential term . The coupling constant λ is dimensionless in 4-dimensional space-time.
This article uses the (+−−−) metric signature for Minkowski space.
Read more about Quartic Interaction: The Lagrangian, Feynman Integral Quantization, Renormalization, Spontaneous Symmetry Breaking
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