  Pyragas control allows to stabilize unstable states in applied nonlinear
science. We propose to apply a quantum version of the Pyragas protocol to
control individual photon-probabilities in an otherwise only globally
accessible photon-probability distribution of a quantum light emitter. The
versatility of quantum Pyragas control is demonstrated for the case of a
two-level emitter in a pulsed laser-driven half cavity. We show that one- and
two-photon events respond in a qualitatively different way to the half-cavity
induced feedback signal. One-photon events are either enhanced or suppressed,
depending on the choice of parameters. In contrast, two-photon events undergo
exclusively an enhancement up to $50\%$ for the chosen pulse areas. We hereby
propose an implementation of quantum Pyragas control via a time-delayed
feedback setup.
