Qudit
= Qudit
{title2=$\mathbb C^d$}
A <qudit> is a quantum subsystem with $d$ distinguishable basis states and <Hilbert space> $\mathbb C^d$. A <qubit> is the special case $d=2$. Tensor products of <qudits> give a natural setting for <local Hamiltonians> and finite-dimensional <quantum circuits>.