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- Canadian Institute for Theoretical AstrophysicsCA110 papers
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15 papers · 2 filters
On single-photon quantum key distribution in the presence of loss
Marcos Curty, Tobias Moroder
We investigate two-way and one-way single-photon quantum key distribution (QKD) protocols in the presence of loss introduced by the quantum channel. Our analysis is based on a simp…
Superadditivity of distillable entanglement From Quantum Teleportation
Somshubhro Bandyopadhyay, Vwani Roychowdhury
We show that the phenomenon of superadditivity of distillable entanglement observed in multipartite quantum systems results from the consideration of states created during the exec…
Experimental quantum key distribution with active phase randomization
Yi Zhao, Bing Qi, Hoi-Kwong Lo
Phase randomization is an important assumption made in many security proofs of practical quantum key distribution (QKD) systems. Here, we present the first experimental demonstrati…
Quantum key distribution with "dual detectors"
Bing Qi, Yi Zhao, Xiongfeng Ma +2
To improve the performance of a quantum key distribution (QKD) system, high speed, low dark count single photon detectors (or low noise homodyne detectors) are required. However, i…
Security of quantum key distribution using weak coherent states with nonrandom phases
Hoi-Kwong Lo, John Preskill
We prove the security of the Bennett-Brassard (BB84) quantum key distribution protocol in the case where the key information is encoded in the relative phase of a coherent-state re…
Generic Quantum Ratchet Accelerator with Full Classical Chaos
Jiangbin Gong, Paul Brumer
A simple model of quantum ratchet transport that can generate unbounded linear acceleration of the quantum ratchet current is proposed, with the underlying classical dynamics fully…