Discussion Overview
The discussion focuses on methods to calculate the polarizability and permittivity of arbitrary compounds, specifically mentioning oxygen as an example. The scope includes theoretical approaches and computational methods relevant to these properties.
Discussion Character
- Technical explanation, Exploratory
Main Points Raised
- One participant seeks effective methods for calculating polarizability and permittivity of compounds.
- Another participant inquires whether the focus is on static or frequency-dependent properties.
- The original poster expresses a preference for frequency-dependent calculations but acknowledges that static calculations would suffice in many cases.
- A later reply suggests using a finite field approach to calculate static polarizability, invoking the Hellman-Feynman theorem and noting the need for diffuse basis sets for accuracy.
- This reply also mentions that calculating permittivity may require specialized software, referencing the CFOUR package for coupled cluster methods and suggesting that density functional methods might have other options.
Areas of Agreement / Disagreement
Participants do not reach a consensus on a specific method for permittivity calculations, and there are differing views on the preferred approach for polarizability calculations.
Contextual Notes
The discussion highlights the need for specific computational resources and methods, as well as the importance of basis set selection for accurate results. There are unresolved aspects regarding the software options for permittivity calculations.