A scheme for the teleportation of an arbitrary two-particle state via two non-maximally entangled particle pairsis proposed. We show that teleportation can be successfully realized with a certain probability if the re...A scheme for the teleportation of an arbitrary two-particle state via two non-maximally entangled particle pairsis proposed. We show that teleportation can be successfully realized with a certain probability if the receiveradopts an appropriate unitary-reduction strategy. A specific strategy is provided in detail The probability of successful teleportation is determined by the smaller coefficients of the two entangled pairs.展开更多
The schematic optical realization of deterministic multicopy(three-copy)entanglement concentration under local operations and classical communication(LOCC)is presented,which can resort to the linear optical elements,c...The schematic optical realization of deterministic multicopy(three-copy)entanglement concentration under local operations and classical communication(LOCC)is presented,which can resort to the linear optical elements,controlled-NOT gate that uses weak cross-Kerr nonlinearity effect and entangled qudits with different degrees of freedom.This concentration is based on Nielsen's theorem,which in principle quantifies the unit success probability.In addition,the required positive operator-valued measurement(POVM)is implemented through direct sum extension,because the least number of ancillary dimensions is demanded.The construction of POVM is systematically formulated,which results in the feasibility to generate the protocol to n-copy(n>3)cases.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No.19874056.
文摘A scheme for the teleportation of an arbitrary two-particle state via two non-maximally entangled particle pairsis proposed. We show that teleportation can be successfully realized with a certain probability if the receiveradopts an appropriate unitary-reduction strategy. A specific strategy is provided in detail The probability of successful teleportation is determined by the smaller coefficients of the two entangled pairs.
基金Supported by the National Natural Science Foundation of China under Grant No 60677044 and 11005099the Fundamental Research Funds for the Central University under Grant No 201313012.
文摘The schematic optical realization of deterministic multicopy(three-copy)entanglement concentration under local operations and classical communication(LOCC)is presented,which can resort to the linear optical elements,controlled-NOT gate that uses weak cross-Kerr nonlinearity effect and entangled qudits with different degrees of freedom.This concentration is based on Nielsen's theorem,which in principle quantifies the unit success probability.In addition,the required positive operator-valued measurement(POVM)is implemented through direct sum extension,because the least number of ancillary dimensions is demanded.The construction of POVM is systematically formulated,which results in the feasibility to generate the protocol to n-copy(n>3)cases.
