Interferometric weak measurement of photon polarization
M. Iinuma, Yutaro Suzuki, Gen Taguchi, Yutaka Kadoya, Holger Friedrich Hofmann, Timothy C. Ralph, Ping Koy Lam · AIP conference proceedings · 2011
We realize a minimum back‐action quantum non‐demolition measurement of variable strength on photon polarization in the diagonal(PM) basis by two‐mode path interference. This method uses the phase difference between the positive (P) and negative (M) superpositions in the interference between the horizontal (H) and vertical (V) polarized paths in the input beam. Although the interference can not occur when the H and V polarizations are distinguishable, a well‐controlled amount of interference is induced by erasing the H and V information using a coherent rotation of polarization toward a common diagonal polarization. This method is particularly suitable for the realization of weak measurements, where the control of the back‐action is essential.