Quantum Hall realization of polarized intensity interferometry

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 a single gate that separates the spin resolved edge states of the ν = 2 state. An analog of waveplate (from polarization optics) is realized by exposing the individual edges to nano-magnets 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 nano-magnets results in oscillations observed solely in the cross-correlated noise arising from two-particle interference. Through numerical simulations, we demonstrate that our proposal is well within the reach of recent experimental developments in spin manipulations on the QH edge.