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Article
Entanglement-based secure quantum cryptography over 1,120 kilometres
Quantum key distribution (QKD)1–3 is a theoretically secure way of sharing secret keys between remote users. It has been demonstrated in a laboratory over a coiled optical fibre up to 404 kilometres long4–7. In t...
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Article
Quantification of Soil Macropores at Different Slope Positions under Alpine Meadow Using Computed Tomography in the Qinghai Lake Watershed, NE Qinghai–Tibet
Soil macropores largely control fluid and solute transport and the runoff processes on the slopes. However, the characterization of soil macropores for different slope positions under alpine meadow conditions ...
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Article
Satellite-to-ground quantum key distribution
Quantum key distribution (QKD) uses individual light quanta in quantum superposition states to guarantee unconditional communication security between distant parties. However, the distance over which QKD is ac...
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Article
Response of daily stem radial growth of Platycladus orientalis to environmental factors in a semi-arid area of North China
The daily stem radial growth of P. orientalis during the main growing period in semi-arid areas of North China is mainly limited by moisture availability. ...
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Article
Direct and full-scale experimental verifications towards ground–satellite quantum key distribution
Quantum key distribution (QKD) provides the only intrinsically unconditional secure method for communication based on the principle of quantum mechanics. Compared with fibre-based demonstrations, free-space li...
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Article
Quantum teleportation and entanglement distribution over 100-kilometre free-space channels
Quantum teleportation of independent qubits and entanglement distribution have been demonstrated over free-space channels of about 100 kilometres, representing an important step towards a global quantum network.
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Article
The effects of flooding on several hybrid poplar clones in Northern China
The ecophysiological, morphological, and growth characteristics of 14 poplar clones were studied during 37 days of flooding and a 13-day recovery period. Cuttings were subjected to three soil water regimes, vi...