Tripartite Splitting Arbitrary 2-Qubit Quantum Information by Using Two Asymmetric W States

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。

Quantum Information Splitting of an Arbitrary Three-Atom State by Using W-class States in Cavity QED

We demonstrate that four sets of W-class states can be used to realize the deterministic quantum information splitting of an arbitrary three-atom state in cavity QED.The scheme does not involve Bell-state measurement and is insensitive to both the cavity decay and the thermal field.

Tripartition of Arbitrary Single-Qubit Information via a Class of Asymmetric Four-Qubit W State

A four-party scheme is put forward for a sender to partition arbitrary single-qubit information amongthree receivers by utilizing a class of asymmetric four-qubit W state as quantum channels.In the scheme the sender'squantum information can be recovered by the three receivers if and only if they collaborate together.Specifically,theycollaborate to perform first two different 2-qubit collective unitary operations and then a singie-qubit unitary operation.The scheme is symmetric and(3,3)-threshold with regard to the reconstruction,for any receiver can be assigned toconclusively recover the quantum information with the other two's assistances.

Partition of arbitrary single-qubit information among n recipients via asymmetric(n+1)-qubit W state

A symmetric and(n,n)-threshold scheme for a sender to partition his/her arbitrary single-qubit information among n recipients is proposed by using a newly constructed asymmetric(n+1)-qubit W state.Both the scheme in some given scenarios and the new W state are also discussed given.

两量子比特态量子信息分离的最小测量复杂性(英文)

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。