Fermi momentum
= Fermi momentum
{c}
{title2=$p_F$}
Fermi momentum is the momentum at the boundary of occupied one-particle states in a zero-temperature <Fermi gas>. For spin-one-half particles in three dimensions, counting the two spin states gives $p_F=\hbar(3\pi^2n)^{1/3}$, where $n$ is <number density>.