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- Massachusetts Institute of TechnologyUS194 papers
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4 papers · 2 filters
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…
Characterization of Collective Gaussian Attacks and Security of Coherent-State Quantum Cryptography
Stefano Pirandola, Samuel L. Braunstein, Seth Lloyd
We provide a simple description of the most general collective Gaussian attack in continuous-variable quantum cryptography. In the scenario of such general attacks, we analyze the…
Quantum Direct Communication with Continuous Variables
Stefano Pirandola, Samuel L. Braunstein, Stefano Mancini +1
We show how continuous variable systems can allow the direct communication of messages with an acceptable degree of privacy. This is possible by combining a suitable phase-space en…
Capacity of the Bosonic Wiretap Channel and the Entropy Photon-Number Inequality
Saikat Guha, Jeffrey H. Shapiro, Baris I. Erkmen
Determining the ultimate classical information carrying capacity of electromagnetic waves requires quantum-mechanical analysis to properly account for the bosonic nature of these w…