Quantum Cryptography with Entangled Photons

1999/12/28 by Thomas Jennewein, Christoph Simon, Gregor Weihs +3 · 26 citations
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #quant-ph

paper · pdf · doi:10.1103/physrevlett.84.4729

4 pages, 3 figures (1 in color). Submitted to PRL

arxiv created 1999/12/28 · openalex publication_date 2000/05/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

By realizing a quantum cryptography system based on polarization entangled photon pairs we establish highly secure keys, because a single photon source is approximated and the inherent randomness of quantum measurements is exploited. We implement a novel key distribution scheme using Wigner's inequality to test the security of the quantum channel, and, alternatively, realize a variant of the BB84 protocol. Our system has two completely independent users separated by 360 m, and generates raw keys at rates of 400 - 800 bits/second with bit error rates arround 3 percent.

Citations

• Violation of Bell's inequality under strict Einstein locality conditions
• New High-Intensity Source of Polarization-Entangled Photon Pairs

Cited by

• Entanglement-based quantum communication over 144 km
• A strong loophole-free test of local realism
• Experimental quantum cryptography with qutrits
• Information and computation: Classical and quantum aspects
• Stimulated emission of polarization-entangled photons
• Threshold distances for transmission of EPR pairs through Pauli channels
• Quantum message exchange based on entanglement and Bell-state measurements
• Optimal focusing for maximal collection of entangled narrow-band photon pairs into single-mode fibers
• Heralded generation of entanglement with coupled cavities
• Information transfer by quantum matterwave modulation
• Highly efficient generation of pulsed photon pairs with bulk periodically poled potassium titanyl phosphate
• Quantum entanglement and the Bell Matrix
• Secure communication with single-photon two-qubit states
• Efficient quantum-key-distribution scheme with nonmaximally entangled states
• Joint spectrum mapping of polarization entanglement in spontaneous parametric down-conversion
• Spectral polarization and spectral phase control of time-energy entangled photons
• Experimental quantum key distribution based on a Bell test
• Free-space quantum key distribution with entangled photons
• John Bell and the nature of the quantum world
• Entangled-photon Fourier optics
• Bell nonlocality
• Metasurface-Assisted Adaptive Quantum Phase Contrast Imaging
• Photonic entanglement as a resource in quantum computation and quantum communication
• Experimental Demonstration of Four-Party Quantum Secret Sharing
• Experimental realization of a photonic Bell-state analyzer
• Thomas Jennewein [wikipedia]