^{[23,28]}. Obtained by photon statistics, and it included evidence of the bunching phenomenon for Gaussian sources already explored by Hanbury-Brown and Twiss, but also of the absence of such a bunching for a laser field^{[25]}. These experiments provided a physical ground for Glauber's theory of coherence.: Application of the above methods to 1966-67laser fluctuations at threshold, yielding the first experimental evidence of critical fluctuations^{[34]} and slowing down^{[37]} in a "phase transition out of equilibrium", as called later.: 1967Transient statistics of a laser switched from below to above threshold^{[33]}: discovered a new phenomenon, namely, a transient enhancement of the photon variance.: The time statistics permits an accurate calibration of the initial photon number giving rise to the amplified chain in a laser. This method has been called "1989statistical microscope"^{[173]} because it provides measurement of a small photon number not by electron multiplication (as in usual photomultipliers) but by photon multiplication.
Quantum state reconstruction by tomography^{[299]}.
Nonlocal experiments on entangled photon pairs^{[302]}. |

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