Exploration of Quantum Feedback Delay Networks

Quantum Feedback Delay Networks are audio-processing structures based on delay lines and scattering matrices in a feedback loop, where audio is encoded in qubits, and qubits or their representations evolve through the network. In this exploration, different realizations with different degrees of physical realizability are tried out, starting from the quantum version of a recursive comb filter, up to higher order structures with several delay lines and qubits.