摘要
在这篇论文，我们为由把二个不对称的 W 状态用作量隧道切开一个任意的 2-qubit 量信息建议一个分成三部分的计划。如果二个接受者一起协作，在 schemem，他们装确定的联盟者由执行第一一 4-qubit 恢复量信息集体单一的操作然后二 single-qubit 单一的操作。另外，自从不对称的 W 状态作为量隧道被采用，计划对 decoherence 是柔韧的。
In this paper we propose a tripartite scheme for splitting an arbitrary 2-qubit quantum information by using two asymmetric W states as the quantum channel. In the schemem if the two recipients collaborate together, they can deterministically recover the quantum information by performing first a 4-qubit collective unitary operation and then two single-qubit unitary operations. In addition, since the asymmetric W states are employed as the quantum channel, the scheme is robust against decoherence.
基金
supported by Program for New Century Excellent Talents in Universities of China under Grant No.NCET-06-0554
the National Natural Science Foundation of China under Grant Nos.60677001 and 10747146
the Science-Technology Fund of Anhui Province for Outstanding Youth under Grant No.06042087
the Key Fund of the Ministry of Education of China under Grant No.206063
the Natural Science Foundation of Guangdong Province under Grant Nos.06300345 and 7007806
the Talent Foundation of High Education of Anhui Province for Outstanding Youth under Grant No.2009SQRZ056
