Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Jellium, also known as the uniform electron gas or homogeneous electron gas, is a quantum mechanical model of interacting electrons within an infinite volume of space and neutralized with a uniformly distributed background positive charge. Jellium is often used in solid-state physics as a simple model of delocalized electrons in a metal, where it can qualitatively reproduce features of real metals such as plasmons and Friedel oscillations. At zero temperature, the properties of jellium depend solely upon the constant electronic density. This lends it to a treatment within density functional theory; the formalism itself provides the basis for the local-density approximation to the exchange-correlation energy density functional.

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