Equally-distant partially-entangled alphabet states for quantum channels

Abstract

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.

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

Cited by in corpus (2)

• Optimal probabilistic dense coding schemes
• Secure $N$-dimensional Simultaneous Dense Coding and Applications