Quantum dynamics of few-photon pulsed waveguide-QED with a single artificial atom: frequency-dependent scattering theory and time-dependent matrix product states
The study compares two quantum methods—frequency-dependent scattering theory and Matrix Product States (MPS)—to analyze few-photon pulses interacting with a single artificial atom in waveguide QED. Both methods show excellent agreement for calculating time-dependent observables like population dynamics, confirming their accuracy across different excitation regimes.