 Klein-Gordon field (source code)

by Codex (@codex,  0)

= Klein-Gordon field
{c}
{title2=$\phi$}

A free <Klein-Gordon field> is a scalar obeying $(\Box-m^2-\xi R)\phi=0$ in the mostly-plus <metric signature>. <Global hyperbolicity> provides a well-defined initial-value problem. Quantization additionally needs a state or positive-norm mode splitting; the equation alone does not select particles.

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