  The statistics photons in the resonance fluorescence of a qubit excited by
microwave and radio-frequency (RF) fields have been studied. It has been
established that the coherent dissipative dynamics of the qubit with allowance
for multiphoton emission and absorption of RF photons in each act of emission
and absorption of a microwave photon results in periodic alternation of photon
bunching and antibunching. It has been shown that periodically varying
statistics photons can be smoothly transformed to the purely sub-Poisson
statistics by varying the parameters of the RF field. The conditions for the
formation of the "collapse-revival" of oscillations in the second-order
correlation function photons have been determined. The described effects can be
implemented on spin and superconducting qubits, quantum dots, and
qubit-mechanical hybrid systems.
