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説明
We show that any pure, two-mode, $N$-photon state with $N$ odd or equal to two can be transformed into an orthogonal state using only linear optics. According to a recently suggested definition of polarization degree, this implies that all such states are fully polarized. This is also found to be true for any pure, two-mode, energy eigenstate belonging to a two-dimensional SU(2) orbit. Complete two- and three-photon bases whose basis states are related by only phase shifts or geometrical rotations are also derived.
6 pages, no figure, references and an extended proof of unit polarization for all odd N added
収録刊行物
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- Physical Review A
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Physical Review A 71 2005-03-30
American Physical Society (APS)