Achieving Ultimate Noise Tolerance in Quantum Communication
| Autor: | Duncan G. England, Khabat Heshami, Frédéric Bouchard, Benjamin J. Sussman, Philip J. Bustard, Ebrahim Karimi, Kate L. Fenwick |
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| Rok vydání: | 2021 |
| Předmět: |
Quantum Physics
Photon business.industry Computer science Single-mode optical fiber Mode (statistics) FOS: Physical sciences General Physics and Astronomy Cryptography 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences optics Noise Orders of magnitude (time) quantum information 0103 physical sciences Noise tolerance Electronic engineering Quantum Physics (quant-ph) 010306 general physics 0210 nano-technology business Quantum information science |
| Zdroj: | Physical Review Applied. 15 |
| ISSN: | 2331-7019 |
| DOI: | 10.1103/physrevapplied.15.024027 |
| Popis: | At the fundamental level, quantum communication is ultimately limited by noise. For instance, quantum signals cannot be amplified without the introduction of noise in the amplified states. Furthermore, photon loss reduces the signal-to-noise ratio, accentuating the effect of noise. Thus, most of the efforts in quantum communications have been directed towards overcoming noise to achieve longer communication distances, larger secret key rates, or to operate in noisier environmental conditions. Here, we propose and experimentally demonstrate a platform for quantum communication based on ultrafast optical techniques. In particular, our scheme enables the experimental realization of high-rates and quantum signal filtering approaching a single spectro-temporal mode, resulting in a dramatic reduction in channel noise. By experimentally realizing a 1-ps optically induced temporal gate, we show that ultrafast time filtering can result in an improvement in noise tolerance by a factor of up to 1200 compared to a 2-ns electronic filter enabling daytime quantum key distribution or quantum communication in bright fibers. 11 pages, 9 figures |
| Databáze: | OpenAIRE |
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