# Quantum physics functions (plasmapy.formulary.quantum)

Functions for quantum parameters, including electron degenerate gases and warm dense matter.

## Functions

 chemical_potential(n_e, T) Calculate the ideal chemical potential. deBroglie_wavelength(V, particle) Return the de Broglie wavelength. Calculate the kinetic energy in a degenerate electron gas. quantum_theta(T, n_e) Compare Fermi energy to thermal kinetic energy to check if quantum effects are important. Calculate the thermal de Broglie wavelength for electrons. Calculate the exponential scale length for charge screening for cold and dense plasmas. Calculate the Wigner-Seitz radius, which approximates the inter-particle spacing.

## Aliases

PlasmaPy provides aliases of the most common plasma functionality for user convenience. Aliases in PlasmaPy are denoted with a trailing underscore (e.g., alias_). For further details, please refer to the contributor guide’s section on aliases.

 Ef_(n_e) Alias to Fermi_energy. lambdaDB_(V, particle) Alias to deBroglie_wavelength.