Comment on 'Photon Antibunching in a Free-Electron Laser'.

摘要

A recent paper stated that the photon-number distribution in a free-electron laser is always sub-Poissonian. This statement is clearly in contradiction with well-known published results. In the recoilless approximation the photon statistics is Poissonian. However, for electron recoil different from zero, the photon-number distribution presents bunching (anti-bunching) for positive (negative) detuning parameter. Reprints. (jhd)