I have a question regarding the two-particle density function, in particular its Fourier transform. I know that in a liquid or gas the function [tex]n_2(\mathbf{R}_1, \mathbf{R}_2)[/tex] is the probability that two particles will be found at [tex]\mathbf{R}_1[/tex] and [tex]\mathbf{R}_2[/tex]. But what is the significance of its Fourier transform,(adsbygoogle = window.adsbygoogle || []).push({});

[tex]G(\mathbf{k}) = \frac{1}{2} \int d^{3N}\mathbf{R}_1 d^{3N}\mathbf{R}_2 e^{\imath \mathbf{k}\cdot(\mathbf{R}_1 - \mathbf{R}_2)} n_2(\mathbf{R}_1, \mathbf{R}_2) [/tex]

My guess is that it is some sort of momentum distribution, but that's only a guess.

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# The Two-Particle Density function

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