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

In this paper we propose a tripartite scheme for splitting an arbitrary 2-qubit quantum information byusing 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 operationand then two single-qubit unitary operations.In addition,since the asymmetric W states are employed as the quantumchannel,the scheme is robust against decoherence.