Bouwmeester et al.(1997) did the "experimental quantum teleportation" in the polarization basis. For this 'Alice' has to perform a complete measurement on the system (particle 1 and 2) in the "Bell operator basis" {Bennet et al. (1993)}. This is done experimentally, by a beam splitter, with two input ports and two detectors for coincidence measurements. All other states either one of the output port and only anti symmetric Psi(-) will give coincidence (25% probability). What is the theoretical reason behind this?
Yeh. Thanks for the reply. Later I read the quantum theory of beam splitter. If the incident system is bosonic, the particles will emerge from both sided. Since Psi(-) is anti symmetric, to conserve the bosonic nature of photons the spacial wavefunction will be fermionic.
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