Sequential unsharp measurement of photon polarization

We propose a general experimental scheme based on binary trees of partially polarizing beam splitters (PPBSs) for realizing sequential unsharp measurements photon polarization. The sharpnesses and the bases particular polarization can be chosen arbitrarily by using corresponding PPBSs phase plates in setup. In limit low realize weak measurements, too. develop formalism describing which are characterized appropriate measurement operators. show that straightforward realization this model is proposed scheme. output states after any correlation functions characterizing results easily calculated. Our used analyzing consequences applying postselection reselection measurement. derive anomalous mean value an with second-order function reselection. these anomalies measured