Multicast-based multiparty remote state preparation schemes of two-qubit states

We propose two novel schemes for multicast-based remote preparation of two kinds of two-qubit states with the aid of the eight-qubit entangled states as the quantum channels. In our scenario, the different encoded information is transmitted synchronously from one sender to many spatially separated receivers. Moreover, it is shown that the first scheme is realized successfully and efficiently, and only the four-qubit projective measurement and appropriate local unitary operations are needed. In particular, the eight-qubit partially entangled channel is utilized in the second.