Equally-distant partially-entangled alphabet states for quantum channels

Details Equally-distant partially-entangled alphabet states for quantum channels Equally-distant partially-entangled alphabet states for quantum channels

2000-09-19

arxiv.org/abs/quant-ph/0009075v1

Physics

Quantum Physics

7 revtex pages, 2 eps figures, to appear in Phys. Rev. A 62, 1 November (2000)

Scientific paper

10.1103/PhysRevA.62.052301

Each Bell state has the property that by performing just local operations on one qubit, the complete Bell basis can be generated. That is, states generated by local operations are totally distinguishable. This remarkable property is due to maximal quantum entanglement between the two particles. We present a set of local unitary transformations that generate out of partially entangled two-qubit state a set of four maximally distinguishable states that are mutually equally distant. We discuss quantum dense coding based on these alphabet states.

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