Quantum switch teleportation with continuous variables using two-mode squeezed light

Summary form only given. The scheme for continuous variable switch teleportation was proposed by using a pair of two-mode squeezed state lights on beamsplitter of 50% and polarizing beam splitter. Teleportation ability is examined by the criteria proposed by Ralph and Lam (1998) from a small signal quantum optical point of view. A pair of two-mode squeezed lights, which are coupled by two modes with identical frequency but orthogonal polarization, are mixed on a 50:50 beamsplitter. The outgoing fields are separated into A,B,C,D, by the polarizing beam splitter based on the polarization. It results in entanglement between the mode A and mode B or mode A and mode D in turn depending the input relative phase between two input two-mode squeezed lights or the quadrature components of squeezing. Thus, switching EPR beams with continuous variable are obtained.