Detecting the relative phase between different frequency components of a photon using a three-level Λ atom coupled to a waveguide
Janet Zhong, Rituraj Rituraj, Fatih Dinç, Shanhui Fan · Physical Review A · 2023
The authors study the scattering of a two-tone photon with a three-level $\mathrm{\ensuremath{\Lambda}}$ atom in a superposition of ground states, when the atom is coupled to a waveguide. The system can be used to detect both the relative phase between the photon frequencies and the relative phase of the atomic ground states as the output scattering depends on both quantities.