Twisted XXZ next-nearest-neighbour correlation conjecture

For the even-site ground state $|\Psi^{(2n)}\rangle$, define the normalized expectation of an operator $O$ by

$$\langle O\rangle_{2n}=\frac{\langle\Psi^{(2n)}|O|\Psi^{(2n)}\rangle}{\langle\Psi^{(2n)}|\Psi^{(2n)}\rangle},$$

and define $\alpha_i=(1+\sigma_i^z)/2$. The twisted XXZ next-nearest-neighbour correlation conjecture.

$$\langle\alpha_i\alpha_{i+2}\rangle_{2n}=\frac{71n^4-19n^2+20}{16(4n^2-1)^2}.$$

This is the twisted-boundary analogue of an earlier correlation conjecture; the source states that it is open at this point.