Experimental wavelength-multiplexed entanglement-based quantum cryptography
| Autor: | Johannes Pseiner, Lukas Bulla, Rupert Ursin, Lukas Achatz, Martin Bohmann |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Physics
Quantum Physics Key generation Photon Physics and Astronomy (miscellaneous) Materials Science (miscellaneous) FOS: Physical sciences Quantum entanglement Quantum key distribution 01 natural sciences Multiplexing Atomic and Molecular Physics and Optics 010309 optics Photon entanglement Quantum cryptography 0103 physical sciences Key (cryptography) Electronic engineering Electrical and Electronic Engineering Quantum Physics (quant-ph) 010306 general physics |
| Zdroj: | Quantum Science and Technology. 6:035013 |
| ISSN: | 2058-9565 |
| DOI: | 10.1088/2058-9565/ac0519 |
| Popis: | In state-of-the-art quantum key distribution (QKD) systems, the main limiting factor in increasing the key generation rate is the timing resolution in detecting photons. Here, we present and experimentally demonstrate a strategy to overcome this limitation, also for high-loss and long-distance implementations. We exploit the intrinsic wavelength correlations of entangled photons using wavelength multiplexing to generate a quantum secure key from polarization entanglement. The presented approach can be integrated into both fiber- and satellite-based quantum-communication schemes, without any changes to most types of entanglement sources. This technique features a huge scaling potential allowing to increase the secure key rate by several orders of magnitude as compared to non-multiplexed schemes. Comment: 9 pages, 3 figures |
| Databáze: | OpenAIRE |
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