Equally distant, partially entangled alphabet states for quantum channels

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Authors	ZIMAN Mario BŮŽEK Vladimír
Year of publication	2000
Type	Article in Periodical
Magazine / Source	Physical Review A
MU Faculty or unit	Faculty of Informatics
Citation
Web	http://xxx.lanl.gov/abs/quant-ph/0009075
Field	Theoretical physics
Keywords	COMMUNICATION
Description	Each Bell state has the property that by performing just local operations on one qubit, the complete Bell basis can be generated. That is, slates 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.
Related projects:	Informatics as the third methodology Non-sequential Models of Computing -- Quantum and Concurrent Distributed Models of Computing