Usefulness of Multiqubit W-type States in Quantum Information Processing Task

Abstract

We analyze the efficacy of multiqubit W-type states as resources for quantum information. For this, we identify and generalize four-qubit W-type states. Our results show that the states can be used as resources for deterministic quantum information processing. The utility of results, however, is limited by the availability of experimental setups to perform and distinguish multiqubit measurements. We, therefore, emphasize on another protocol where two users want to establish an optimal bipartite entanglement using the partially entangled W-type states. We found that for such practical purposes, four-qubit W states can be a better resource in comparison to three-qubit W-type states. For dense coding protocol, our states can be used deterministically to send two bits of classical message by locally manipulating a single qubit.

7 pages, 8 figures, Accepted in the Journal of Experimental and Theoretical Physics (2016)

References in corpus (3)

• Experimental construction of generic three-qubit states and their reconstruction from two-party reduced states on an NMR quantum information processor
• Experimental generation of tripartite polarization entangled states of bright optical beams
• A study of the efficiency of the class of $W$-states as a quantum channel

Cited by in corpus (1)

• The necessary and sufficient condition for perfect teleportation and superdense coding and all the suitable states for teleportation and superdense coding