### Generalized W-states and Quantum Communication ProtocolsGeneralized W-states and Quantum Communication Protocols

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 Author Pradhan, B. ♦ Agrawal, Pankaj ♦ Pati, A. K. Source arXiv.org Content type Text File Format PDF Date of Submission 2008-05-17 Language English
 Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Physics Subject Keyword Quantum Physics ♦ physics:quant-ph Abstract We consider W-states and generalized W-states for $n$-qubit systems. We obtain conditions to use these states as quantum resources to teleport unknown states. Only a limited class of multi-qubit states can be teleported. For $one$-qubit states, we use protocols which are simple extensions of the conventional teleportation protocol. We also show that these resource states can be used to transmit {\em at most} $n + 1$ classical bits by sending $n$ qubits if the appropriate conditions are met. Therefore these states are not suitable for maximal teleportation or superdense coding when $n > 3$. Educational Use Research Learning Resource Type Article Page Count 14