 Klein-Gordon equation in Einstein notation

ID: klein-gordon-equation-in-einstein-notation

 Top articles  Latest articles New article in topic

Klein-Gordon equation in Einstein notation by

Ciro Santilli 37 Updated 2025-07-16

The Klein-Gordon equation can be written in terms of the d'Alembert operator as:

□ ψ + m^{2} ψ = 0

so we can expand the d'Alembert operator in Einstein notation to:

\partial_{i} \partial^{i} ψ - m^{2} ψ = 0

 Read the full article

 New to topics? Read the docs here!