Translational-internal entanglement states and quantum information for single photons
Goren Gordon, Noam Erez, Gershon Kurizki · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2009
We consider single photons propagating along two paths, with the polarization correlated to the path. Two information related aspects of this translational-internal entanglement (TIE) are analyzed: a) Using the polarization to record the path (a "flying detector" scheme), we characterize the tradeoff between path- and phaseinformation. b) We investigate the effects of non-Markovian noise on the two-qubit quantum channel consisting of the photon path and polarization (that are both used to encode information), and suggest noise protection schemes.