Journal
INTERNATIONAL JOURNAL OF QUANTUM INFORMATION
Volume 9, Issue 5, Pages 1267-1278Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0219749911007952
Keywords
Classical communication costs; remote state preparation; teleportation
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Funding
- National Basic Research Program of China (973 Program) [2007CB311203]
- National Natural Science Foundation of China [61003287, 60821001]
- Specialized Research Fund for the Doctoral Program of Higher Education [20100005120002]
- Fundamental Research Funds for the Central Universities [SWJTU11BR006, BUPT2009RC0220]
- 111 Project [B08004]
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Classical communication plays an important role in quantum information processing such as remote state preparation and quantum teleportation. First, in this paper, we present some simple faithful remote state preparation of an arbitrary n-qubit state by constructing entanglement resources and special measurement basis for the sender. Then to weigh the classical resource required, we present an information-theoretical model to evaluate the classical communication cost. By optimizing the classical communication in quantum protocols, we obtain the optimal classical communication cost. This model can also be applied to the quantum teleportation. Moreover, based on the present computation model, we reinvestigate some remote state preparation and teleportation protocols in which the classical communication cost was imperfectly computed. Finally, some problems will be presented.
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