The longer the cavity and the narrower the beam waist, the better the beam quality of the laser emission, or
$|langle\; x\; |\; s\; rangle|^2\; =\; sum\_\{j=1\}^N,Psi(r\_j)^2\; +2\; sum\_\{j=1\}^N,Psi(r\_j)bigg(sum\_\{m=j+1\}^N,Psi(r\_m)cos(Omega\_m-Omega\_j)bigg)$

What It Means

This is a placeholder explanation generated by the low-overhead model. It interprets "The longer the cavity and the narrower the beam waist, the better the beam quality of the laser emission, or
$|langle\; x\; |\; s\; rangle|^2\; =\; sum\_\{j=1\}^N,Psi(r\_j)^2\; +2\; sum\_\{j=1\}^N,Psi(r\_j)bigg(sum\_\{m=j+1\}^N,Psi(r\_m)cos(Omega\_m-Omega\_j)bigg)$" in the context of "in Pulsed Narrow-Linewidth Tunable Laser Oscillators, F. J. Duarte (2003), Tunable Laser Optics page: 147, publisher: Elsevier Academic, ISBN: 0-12-222696-8" to mean that wisdom is timeless.