About this Research Topic
“Quantum 2.0”, the second quantum revolution, is expected to deliver mature applications of quantum technology that can transform our lives and society. One of the pillars of Quantum 2.0 is quantum communication – the art of transferring quantum information from one location to another. The most advanced application of quantum communication is secure distribution of cryptographic keys over a public channel. This field, better known as quantum key distribution (QKD), has evolved from proof-of-concept experiments in labs to testbed realizations for real-life deployments. Apart from QKD, a wide range of other tasks, such as bit commitment, oblivious transfer, and multi-party computation, have also been investigated under the topic of quantum communication.
Quantum communication has witnessed a number of advances on both theoretical and practical fronts, especially in the last decade. There has been immense progress in tackling theoretical issues such as finite-size effects, devising composable security proofs, and obtaining bounds on the ultimate rates for transmitting quantum information. Experimentally, quantum communication has been demonstrated from metropolitan to continental scales via the development of quantum repeaters, relays, and satellites. Nonetheless, there are many open and unsolved questions. A majority of quantum communication links are still implemented in a point-to-point manner. Specific to QKD, there is a need to cut down costs and improve efficiency in manufacturing, deployment, and integration with classical communication systems. Finally, vulnerabilities due to theory-practice gaps continue to appear. To address these issues, we need further exploration of scalable technologies such as photonic-integrated chips. Research on adaptation and integration techniques can facilitate quantum-communication-based solutions in real-world network configurations. Finally, motivating practical security analyses for examining discrepancies between practical QKD implementations and their theoretical model can help in development of robust systems.
The purpose of this Research Topic is to highlight the latest developments that have the potential to address these challenges and concerns, thereby becoming precursors to the wide adoption of quantum communication before we usher in Quantum 3.0.
We therefore invite prospective authors to submit original manuscripts on sub-topics including but not limited to:
- Quantum networks
- Quantum repeaters
- Quantum hacking and countermeasures
- Cost-effective QKD / photonic-integrated chips
- Quantum-classical integration
- Field deployment and use cases
- Key management
- Quantum random number generation
- Device independence
- Standardization activities
- Novel QKD protocols
- QKD security analysis
Keywords: quantum communication, quantum cryptography, security proof, photonic integration, quantum hacking
Important Note: All contributions to this Research Topic must be within the scope of the section and journal to which they are submitted, as defined in their mission statements. Frontiers reserves the right to guide an out-of-scope manuscript to a more suitable section or journal at any stage of peer review.