Eigenstate transmission modes of birefringence optical fibers for entangled twin photons
Atsushi Masubuchi, Takeshi Ozeki · Electronics and Communications in Japan (Part III Fundamental Electronic Science) · 2000
When two photons are coded into entangled polarization states, one of the eigenstates of the direct product of the fiber transfer function matrix is found to be independent of the transmission fiber birefringence. The eigenstate is the entangled singlet state Ψ−, one of the Bell states. The entangled polarization state Ψ− can be transmitted through an optical fiber without degradation in fidelity. © 2000 Scripta Technica, Electron Comm Jpn Pt 3, 83(9): 69–72, 2000