J. Phys. B: At. Mol. Opt. Phys. 44
, 135506 (2011)
Joint remote preparation of four-qubit cluster-type states revisited
N. B. An, C. T. Bich and N. V. Don
We revisit the protocols proposed recently (Zhan et al 2011 J. Phys. B: At. Mol. Opt. Phys.
44 095501) for joint remote preparation of four-qubit cluster-type states. We not only point out
errors in those protocols but also make considerable improvements. Our protocols, for both
the cases of real and complex coefﬁcients of the state to be prepared, consume much less
quantum resource as well as classical communication cost.