Spin fractionalization and zero modes in the spin-$\frac{1}{2}$ XXZ chain with boundary fields

Parameshwar R. Pasnoori, Yicheng Tang, Junhyun Lee +3

In this work we argue that the antiferromagnetic spin $\frac{1}{2}$ XXZ chain in the gapped phase with boundary magnetic fields hosts fractional spin $\frac{1}{4}$ at its edges. Us…