Generalized quantum state sharing of arbitrary unknown two-qubit state

We present first a three-party scheme for probabilistically implementing quantum state sharing of an arbitrary unknown two-qubit state by using two non-maximally entangled three-qubit states as the quantum channel. We show that, by choosing the appropriate performance, it is indeed possible to share an arbitrary unknown two-qubit state using partially entangled states if the parties collaborate. We then sketch the generation of the three-party scheme to N-party case. (c) 2007 Elsevier B.V. All rights reserved.