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The slope of the primordial power spectrum (the power spectrum of density fluctuations produced by inflation in the very early Universe before it had been modified by gravitational/hydro dynamics) is often written,
P(k) = A * k
and then in the same line referred to as scale invariant or the Harrison-Zeldovich scale invariant spectrum. How is this scale invariant when it is a function of the wave number k? Anyone know this?
P(k) = A * k
and then in the same line referred to as scale invariant or the Harrison-Zeldovich scale invariant spectrum. How is this scale invariant when it is a function of the wave number k? Anyone know this?