,Remote State Preparation via a Non-Maximally Entangled Channel

• 作 者: 郑亦庄 顾永建 郭光灿
• 机 构: Laboratory of Quantum Communication and Quantum Computation, University of Science and Technology of
• 出 处: 中国物理快报（英文版）
• 发表日期: 2002年1期

We investigate remote state preparation (RSP) via a non-maximally entangled channel for three cases: a general qubit; a special ensemble of qubits (qubit states on the equator of the Bloch sphere); and an asymptotic limit of N copies ofa general state. The results show that the classical communication cost of RSP for the two latter cases can be less than that of teleportation, but for the first case, in a restricted setting, the classical communication cost is equal to that of teleportation. Whether or not this is the case for a more general setting is still an open question.