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Perfect teleportation and superdense coding with W states

2006; American Physical Society; Volume: 74; Issue: 6 Linguagem: Inglês

10.1103/physreva.74.062320

1538-4446

Pankaj Agrawal, Arun Kumar Pati,

Quantum Mechanics and Applications

True tripartite entanglement of the state of a system of three qubits can be classified on the basis of stochastic local operations and classical communications. Such states can be classified into two categories: GHZ states and $W$ states. It is known that GHZ states can be used for teleportation and superdense coding, but the prototype $W$ state cannot be. However, we show that there is a class of $W$ states that can be used for perfect teleportation and superdense coding.