摘要
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.
出处
《量子电子学报》
CAS
CSCD
北大核心
2010年第2期180-186,共7页
Chinese Journal of Quantum Electronics
基金
The project supported by the Talent Foundation of High Education of Anhui Province for Outstanding Youth under Grant(2009SQRZ056)
关键词
量子信息
量子信息分离
非对称W态
共同幺正操作
经典通讯
quantum information
quantum information splitting
asymmetric W state
collectiveunitary operation
classical communication
