Strongly correlating liquids

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Strongly correlating liquids are defined as those for whom \(R \ge 0.9\) where (Eq. 6 ^[1])

\[R=\frac{\langle \Delta \mathcal{V} \Delta U \rangle}{ \sqrt{ \langle (\Delta \mathcal{V})^2 \rangle \langle (\Delta U)^2 \rangle } }\]

where \(\Delta U\) represents fluctuations of the potential in the NVT ensemble and \(\mathcal{V}\) is the virial (see also Virial pressure).

[edit] Isomorphs

The liquid phase formed by the Lennard-Jones model is an example of a strongly correlating liquid^[3].