Kirkwood–Buff integrals: From fluctuations in finite volumes to the thermodynamic limit
Simon, Jean-Marc; Krüger, Peter; Schnell, Sondre Kvalvåg; Vlugt, Thijs J.H.; Kjelstrup, Signe; Bedeaux, Dick
Peer reviewed, Journal article
Accepted version
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Date
2022Metadata
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Abstract
The Kirkwood–Buff theory is a cornerstone of the statistical mechanics of liquids and solutions. It relates volume integrals over the radial distribution function, so-called Kirkwood–Buff integrals (KBIs), to particle number fluctuations and thereby to various macroscopic thermodynamic quantities such as the isothermal compressibility and partial molar volumes. Recently, the field has seen a strong revival with breakthroughs in the numerical computation of KBIs and applications to complex systems such as bio-molecules. One of the main emergent results is the possibility to use the finite volume KBIs as a tool to access finite volume thermodynamic quantities. The purpose of this Perspective is to shed new light on the latest developments and discuss future avenues.