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Direct and Reverse Secret-Key Capacities of a Quantum Channel
Stefano Pirandola, Raul Garcia-Patron, Samuel L. Braunstein +1
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…
Reverse Coherent Information
Raúl García-Patrón, Stefano Pirandola, Seth Lloyd +1
In this letter we define a family of entanglement distribution protocols assisted by feedback classical communication that gives an operational interpretation to reverse coherent i…
Continuous-variable quantum key distribution protocols over noisy channels
Raul Garcia-Patron, Nicolas J. Cerf
A continuous-variable quantum key distribution protocol based on squeezed states and heterodyne detection is introduced and shown to attain higher secret key rates over a noisy lin…