Equivalence of space and time-bins in DPS-QKD
| Autor: | Shaw, Gautam, Sridharan, Shyam, Ranu, Shashank, Shingala, Foram, Mandayam, Prabha, Prabhakar, Anil |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | IEEE.Photonics.Journal.14.5 (2022) 1-7 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1109/JPHOT.2022.3204920 |
| Popis: | Key generation efficiency, and security, in DPS-QKD improve with an increase in the number of path delays or time-bin superpositions. We demonstrate the implementation of super-position states using time-bins, and establish an equivalence with path-based superposition, thus yielding a simpler implementation of higher-order superposition states for differential phase-shift quantum key distribution (DPS-QKD). We set up DPS-QKD, over 105 km of single mode optical fiber, with a quantum bit error rate of less than 15% at a secure key rate of 2 kbps. With temporal guard bands, the QBER reduced to less than 10%, but with a 20% reduction in the key rate. Comment: 8 pages, 11 figures |
| Databáze: | arXiv |
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