Different Environments in Quantum Statistical Mechanics: To $\beta$ or not to $(k_{\mathrm{B}}T{)}^{-1}$

Ellen T. Ekstrøm, Jacob Pedersen, Ida-Marie Høyvik

We piece together textbook material to re-derive the parameter $\beta$ entering reduced density operators from quantum statistical mechanics. By re-deriving $\beta$, we show that the conte…