<正> In this paper,we propose a protocol to deterministically teleport an unknown mixed state of qubit byutilizing a maximally bipartite entangled state of qubits as quantum channel.If a non-maximally entangled ...<正> In this paper,we propose a protocol to deterministically teleport an unknown mixed state of qubit byutilizing a maximally bipartite entangled state of qubits as quantum channel.If a non-maximally entangled bipartite purestate is employed as quantum channel,the unknown mixed quantum state of qubit can be teleported with 1-(1-C~2)~(1/2)probability,where C is the concurrence of the quantum channel.The protocol can also be generalized to teleport amixed state of qudit or a multipartite mixed state.More important purpose is that,on the basis of the protocol,theteleportation of an arbitrary multipartite(pure or mixed)quantum state can be decomposed into the teleportation ofeach subsystem by employing separate entangled states as quantum channels.In the case of deterministic teleportation,Bob only needs to perform unitary transformations on his single particles in order to recover the initial teleportedmultipartite quantum state.展开更多
基金The project supported by National Natural Science Foundation of China under Grant Nos. 10575017 and 60472017
文摘<正> In this paper,we propose a protocol to deterministically teleport an unknown mixed state of qubit byutilizing a maximally bipartite entangled state of qubits as quantum channel.If a non-maximally entangled bipartite purestate is employed as quantum channel,the unknown mixed quantum state of qubit can be teleported with 1-(1-C~2)~(1/2)probability,where C is the concurrence of the quantum channel.The protocol can also be generalized to teleport amixed state of qudit or a multipartite mixed state.More important purpose is that,on the basis of the protocol,theteleportation of an arbitrary multipartite(pure or mixed)quantum state can be decomposed into the teleportation ofeach subsystem by employing separate entangled states as quantum channels.In the case of deterministic teleportation,Bob only needs to perform unitary transformations on his single particles in order to recover the initial teleportedmultipartite quantum state.
