I came across a research paper with the following paragraph in a research paper.
I am trying to fetch fluctuations from Kirchhoff's matrix and that is why I am interested in the (1) formulae.
The question I wish to ask is: In the formulae, Boltzmann's coefficient is multiplied with absolute zero temperature (according to the paragraph followed). However, absolute temperature is always zero (Kelvin scale). How will this fetch any other value than zero?
I got to know there is the combined value of kT. However, I couldn't find any source stating that it is not zero at absolute temperature.