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Direct and Reverse Secret-Key Capacities of a Quantum Channel by Pirandola, Stefano; Garcia-Patron, Raul; Braunstein, Samuel L.; Lloyd, Seth is a scholarly article available to read on EtoBox.

What is Direct and Reverse Secret-Key Capacities of a Quantum Channel about?

We define the direct and reverse secret-key capacities of a memoryless quantum channel as the optimal rates that entanglement-based quantum key distribution protocols can reach by using a single forward classical communication (direct reconciliation) or a single feedback classical communication (reverse reconciliation). In particular, the reverse secret-key capacity can be positive for antidegradable channels, where no forward strategy is known to be secure. This property is explicitly shown in the continuous variable framework by considering arbitrary one-mode Gaussian channels.

Author

Pirandola, Stefano; Garcia-Patron, Raul; Braunstein, Samuel L.; Lloyd, Seth

Published

2008

Language

EN