2 research outputs found
Covert Quantum Communication Over Optical Channels
We explore the problem of covertly communicating qubits over the lossy
thermal-noise bosonic channel, which is a quantum-mechanical model of many
practical channels, including optical. Covert communication ensures that an
adversary is unable to detect the presence of transmissions, which are
concealed in channel noise. We investigate an achievable lower bound on quantum
covert communication using photonic dual-rail qubits. This encoding has
practical significance, as it has been proposed for long-range repeater-based
quantum communication over optical channels