Patent ID: 7317878
Filing Date: 2008-01-08
Classification: H04B,H04L

Abstract:
1. A quantum switch teleportation system, comprising: only one pair of two-mode squeezed light source devices that generate a pair of two-mode squeezed lights; a first beam splitter that mixes and separates said pair of two-mode squeezed lights; a first polarizing beam splitter that separates one of the said pair of two-mode squeezed lights separated by the first beam splitter based on its polarization; a second polarizing beam splitter that separates the other one of the pair of two-mode squeezed light separated by the first beam splitter based on its polarization; a second beam splitter that mixes an input signal with the two-mode squeezed light separated by the first polarizing beam splitter and separates the mixed input signal and the two-mode squeezed light separated by the first polarizing beam splitter; a quantum information input section that inputs the input signal comprising quantum states having quantum information; a pair of detectors that detect a pair of two-mode squeezed lights mixed and separated on the second beam splitter and transform the pair of two-mode squeezed lights into electric currents containing information; a first receiving device; a second receiving device; a first transmit path that transmits a difference information relating to the electric currents transformed by said detectors to the first receiving device and to the second receiving device; and a second transmit path that transmits a sum information relating to the electric currents transformed by said detectors to the first receiving device and to the second receiving device, wherein only the first beam splitter is used to initially mix the pair of two-mode squeezed lights.