Creating non-classical states using deterministic single photon subtraction in waveguides and bi-modal cavities

We perform analytical and numerical simulations to investigate deterministic single photon subtraction based upon single photon Raman interaction (SPRINT) of a single three-level Λ-type quantum emitter coupled with a chiral waveguide, and in a bi-modal cavity. Unlike probabilistic single photon subtraction based upon beam-splitter like operations, this approach is quasi-independent of the input field statistics and intensity. We study the effect of photon subtraction from different types of optical inputs – continuous-wave (CW) or pulsed coherent states and Fock states, and study the fidelity of subtraction upon key system parameters. We also discuss the prospects of using various experimental platforms suitable for the task. Moreover, we show that SPRINT-based single photon subtraction can be used to create non-Gaussian quantum states with negative Wigner functions, and negative conditional entropies. Such states can be used as quantum resources in various fields of quantum information theory. Finally, as an interesting example, we show how this mechanism can also be used to create Fock states of arbitrary photon number.