On the Locality of Physics in Metals, Semiconductors, and Insulators

Sohrab Ismail-Beigi, Tomas Arias

We present an analytical study of the spatial decay rate $\gamma$ of the one-particle density matrix $\rho (\vec{r},{\vec{r}}^{\prime })\sim \exp (-\gamma |\vec{r}-{\vec{r}}^{\prime }|)$ for systems described by single part…