Sub-extensive non-stabilizerness in the Dyck-Fredkin spin chain
The stabilizer R\'enyi entropy is a quantitative measure of non-stabilizerness, or magic, and has typically been found to scale extensively with system size $N$ (i.e., $\Theta(N)$) for a variety of many-body quantum states. In this note, we study the stabilizer R\'enyi entropy of the ground state of the spin-$\frac{1}{...