We combine the ideas of intensity interferometry, polarization optics, and Bell's measurement into an experimental proposal which is hosted in a ν =2 quantum Hall (QH) edge state. Our interferometer comprises of a single gate, that separates the spin-resolved edge states of ν =2 state. An analog of wave plate (from polarization optics) is realized by exposing the individual edges to nanomagnets over a finite length which facilitates coherent manipulation of the electron spin on the edge. We show that the in-plane rotation of magnetization direction of the nanomagnets results in oscillations observed solely in the cross-correlated noise which arises from two-particle interference. Through numerical simulations we demonstrate that our proposal is well within the reach of recent experimental developments of spin manipulations on the QH edge.