Quantum cryptography using larger alphabets
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- 16 May 2000
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 61 (6) , 062308
- https://doi.org/10.1103/physreva.61.062308
Abstract
Like all of quantum information theory, quantum cryptography is traditionally based on two-level quantum systems. In this paper, a protocol for quantum key distribution based on higher-dimensional systems is presented. An experimental realization using an interferometric setup is also proposed. Analyzing this protocol from the practical side, one finds an increased key creation rate while keeping the initial laser pulse rate constant. Analyzing it for the case of intercept/resend eavesdropping strategy, an increased error rate is found compared to two-dimensional systems, hence an advantage for the legitimate users to detect an eavesdropper.All Related Versions
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