New Photon-Correlation Effects in Near-Resonant Multiphoton Ionization
S. N. Dixit, P. Lambropoulos · Physical Review Letters · 1978
It is shown that in near-resonant $N$-photon ionization, chaotic light can be more efficient than purely coherent light by more than the usual factor of $N!$ ($N$ factorial). This occurs when the resonant intermediate state interferes with another nearby state. Specific results are presented for two-photon ionization.