Communication security has to evolve to a higher plane in the face of the threat from the
massive computing power of the emerging quantum computers. Quantum secure direct …

In principle, quantum key distribution (QKD) offers information-theoretic security based on
the laws of physics. In practice, however, the imperfections of realistic devices might …

Concerted efforts are underway to establish an infrastructure for a global quantum Internet to
realise a spectrum of quantum technologies. This will enable more precise sensors, secure …

Quantum secure direct communication (QSDC) leverages quantum states to transmit
information securely and reliably over a noisy, lossy, and wiretapped quantum channel. It …

Satellite quantum communications are emerging within the panorama of quantum
technologies as a more effective strategy to distribute completely secure keys at very long …

The establishment of a world-wide quantum communication network relies on the synergistic
integration of satellite-based links and fiber-based networks. The first are helpful for long …

Recent experimental breakthroughs in satellite quantum communications have opened up
the possibility of creating a global quantum internet using satellite links. This approach …

The establishment of quantum communication links over a global scale is enabled by
satellite nodes. We examine the influence of the Earth's atmosphere on the performance of …

Previous demonstrations of free-space quantum communication in daylight have been
touted as significant for the development of global-scale quantum networks. Until now, no …

Compared to fiber continuous-variable quantum key distribution (CVQKD), atmospheric link
offers the possibility of a broader geographical coverage and more flexible transmission …