Efficient heralding of photonic qubits with applications to device-independent quantum key distribution

Journal Article · Mon Aug 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.022325· OSTI ID:22068518

Pitkanen, David; Xiongfeng, Ma; Luetkenhaus, Norbert ^[1]; Wickert, Ricardo; Loock, Peter van ^[2]

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1. Institute for Quantum Computing and Department of Physics and Astronomy, University of Waterloo, 200 University Avenue West, N2L 3G1 Waterloo, Ontario (Canada)
2. Max Planck Institute for the Science of Light and Universitaet Erlangen-Nuernberg, D-91058 Erlangen (Germany)

We present an efficient way of heralding photonic qubit signals using linear optics devices. First, we show that one can obtain asymptotically perfect heralding and unit success probability with growing resources. Second, we show that even using finite resources, we can improve qualitatively and quantitatively over earlier heralding results. In the latter scenario, we can obtain perfect heralded photonic qubits while maintaining a finite success probability. We demonstrate the advantage of our heralding scheme by predicting key rates for device-independent quantum key distribution, taking imperfections of sources and detectors into account.

• OSTI ID: 22068518
• Journal Information: Physical Review. A, Vol. 84, Issue 2; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DEFECTS
DISTRIBUTION
EQUIPMENT
OPTICS
PROBABILITY
QUANTUM CRYPTOGRAPHY
QUBITS
RESOURCES
SIGNALS