提出一个用非对称W态作为量子信道分离两量子比特态的方案,如果发送者(Alice)已知待传送态的量子信息,Alice执行两量子比特投影测量后,能分离量子信息并发送给接收者(Bob和Charlie).Bob和Charlie共同执行一个幺正操作后,Charlie再执行两个单量子比特的幺正操作就能恢复原量子态.这个方案大大减小了测量的复杂性.计算了此方案成功的几率和消耗的经典信息.
A quantum information splitting scheme of two-qubit state is proposed by using two asymmetric W states as quantum channel. It's showed that if the two-qubit state is known to the sender (Alice), then she can split quantum information and distribute it to the receivers (Bob and Charlie) by performing a two-qubit projective measurement, Bob and Charlie first perform a collective unitary operation on their qubits, and then Charlie can recover the initial quantum state by implementing two single-qubit unitary operations. So the scheme reduces greatly the measurement complexity. The success probability and classical communication cost are calculated within the scheme.
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