Quantum teleportation into diamond and quantumware security with quantum info-communications

배규찬, 양인석

Dylan Charlton

As satellite communications continue to be an integral part of global infrastructure, they face escalating cybersecurity threats and bandwidth limitations. Traditional cryptographic methods are increasingly vulnerable due to advancements in quantum computing. Quantum teleportation, leveraging quantum entanglement and quantum key distribution, offers a transformative approach to secure satellite communications. This paper lays out the foundational principles of quantum entanglement and quantum key distribution in order to allow for a complete understanding of quantum teleportation. Key experimental milestones for quantum teleportation in space environments are also discussed, such as the Chinese Micius satellite’s achievements and Boeing’s Q4S entanglement swapping mission. The benefits and possibilities of quantum teleportation, such as reduced signal attenuation, enhanced data integrity, and bandwidth optimization are analyzed alongside technical challenges and potential limitations like atmospheric interference and system vulnerabilities. These are brought up to showcase the potential of quantum teleportation to revolutionize satellite transmissions by enhancing secure satellite communications. Current implementations, future prospects, and challenges are laid out to highlight the role of quantum teleportation in national security, data sovereignty, and establishing secure communication networks on a global, and potentially interplanetary scale.

Cyril Popov, Emil E. Petkov, Christo Petkov +4 more

W. K. Yam, M. Renger, S. Gandorfer +2 more

Quantum communication exploits non-classical correlations to achieve efficient and unconditionally secure exchange of information. In particular, the quantum teleportation protocol allows for a deterministic and secure transfer of unknown quantum states by using pre-shared quantum entanglement and classical feedforward communication. Quantum teleportation in the microwave regime provides an important tool for high-fidelity remote quantum operations, enabling distributed quantum computing with superconducting circuits and potentially facilitating short-range, open-air microwave quantum communication. In this context, we consider practical application scenarios for the microwave analog quantum teleportation protocol based on continuous-variable states. We theoretically analyze the effect of feedforward losses and noise on teleportation fidelities of coherent states and show that these imperfections can be fully corrected by an appropriate feedforward gain. Furthermore, we consider quantum teleportation with finite-size codebooks and derive modified no-cloning thresholds as a function of the codebook configuration. Finally, we analyze the security of quantum teleportation under public channel attacks and demonstrate that the corresponding secure fidelity thresholds may drastically differ from the conventional no-cloning values. Our results contribute to the general development of quantum communication protocols and, in particular, illustrate the feasibility of using quantum teleportation in realistic microwave networks for robust and unconditionally secure communication.

Rajendra Kumar Bera

Gunjan, Nodir Rabimov, Arun Khatri +3 more

Quantum teleportation is a new method in quantum communication that allows quantum states to be sent securely using entanglement and classical signals. This research focuses on problems like maintaining strong entanglement, dealing with quantum noise (decoherence) and handling delays in classical communication, which currently limit practical applications. To solve these problems, we built and tested a quantum teleportation circuit using simulation tools and visualized the results using Bloch spheres and statevector analysis. Our results show that quantum states can be teleported accurately while preserving their properties. This proves quantum teleportation is practically achievable and can be used in secure communication, quantum networks, and quantum computers, making it an important step towards building a reliable quantum internet.