Dense Coding via Local Measurement with Extended GHZ-Type State
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Two schemes for dense coding via local measurement with an extended GHZ-type state are investigated. In this protocol, the supervisor (Cliff) can control the channel and the average amount of information transmitted from the sender (Alice) to the receiver (Bob) by adjusting the local measurement angle θ. It is shown that the results for the average amounts of information are unique from the different two schemes.
KeywordsControlled dense coding Average amount of information Extended GHZ state Generalized measurement
- 18.Mor, T., Horodecki, P.: arXiv:quant-ph/9906039