Quantum tasks using six qubit cluster states
Remote state preparation; State sharing; Teleportation
The usefulness of the recent experimentally realized six photon cluster state by C. Y. Lu et al. (Nature 3:91, 2007) is investigated for quantum communication protocols like quantum teleportation and quantum information splitting (QIS) and dense coding. We show that the present state can be used for the teleportation of an arbitrary two qubit state deterministically. Later, we devise two distinct protocols for the QIS of an arbitrary two qubit state among two parties. We construct sixteen orthogonal measurement basis on the cluster state, which will lock an arbitrary two qubit state among two parties. The capability of the state for dense coding is investigated and it is shown that one can send five classical bits by sending only three qubits using this state as a shared entangled resource.We finally show that this state can also be utilised in the remote state preparation of an arbitrary two qubit state. Springer Science+Business Media, LLC 2010.
Paul N.; Menon J.V.; Karumanchi S.; Muralidharan S.; Panigrahi P.K.
Quantum Information Processing, Vol-10, No. 5, pp. 619-632.
Paul N., Mphasis an HP Company, Porur, Chennai 600089, DLF SEZ IT Park, India; Menon J.V., Christ University, Bangalore 560029, Hosur Road, India; Karumanchi S., Birla Institute of Technology and Science, Pilani, India; Muralidharan S., School of EPS, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom; Panigrahi P.K., Indian Institute of Science Education and Research Kolkata, Mohanpur Campus, BCKV Campus Main Office, Mohanpur 741252, India, Physical Research Laboratory, Navrangpura, Ahmedabad 380 009, India