Efficient non-classical light sources based on deterministic photon subtraction

We conduct a photon transport analysis on a deterministic photon subtractor utilizing single-photon Raman interaction with a three-level Λ-type atom inside a waveguide-coupled bimodal cavity. By incorporating parameters from an existing experimental cavity QED platform, we demonstrate that the photon subtractor can achieve success probabilities approaching unity. In the second part, we demonstrate a potential application of deterministic photon subtraction for generating non-classical light, specifically enabling the creation of multi-photon Fock states that can be utilized in quantum metrology at the Heisenberg limit. The results highlight the potential of deterministic photon subtraction for advancing the development of high-efficiency non-classical light sources.