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Updated: Jul 3, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Enhancing underwater quantum communication robustness via partially coherent beams
Abstract:
The underwater quantum channel has been extensively investigated to complete the last piece of the puzzle in building a global quantum communication network. However, the decoherence of the entangled state caused by the underwater turbulence critically destroys the quantum channel and prevents its practical application. Here, we propose a method that uses the partially coherent beam to generate the biphoton state to tackle the problem. We theoretically investigate the impact of the coherence of the pump beam on the coincidence detection of photon pairs through the oceanic turbulence model. Our findings indicate that when the pump beam is partially coherent, the correlation of the generated photon pairs exhibits enhanced stability during propagation through turbulent water. This stability helps mitigate information loss caused by photon scattering, thereby offering a practical approach to improving the efficiency of underwater quantum communication.
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