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Angular distributions and polarization correlations of two-photon spherical states
The properties of angular polarization at the center of mass reference of a system of two-photon spherical Landau states in momentum space are analyzed in detail. The angular distributions for fixed values of J and M do not depend on the parity of P, but are determined by two different functions of the polar angle between the relative momentum and the quantization axes. Two-photon polarization density matrices are derived for each value of J, M and P. The correlations of the linear polarization of individual photons are analyzed in detail. In addition to the usual correlation laws for J ≥ 2, expressed in terms of sin and cos angles between analyzer orientations, correlations are found in terms of the sum of analyzer orientation angles. Keywords: two-photon states, quantum entanglement, parity, selection rules, helicity, polarization, angular momentum, Wigner function, stokes parameters.
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