Abstract
Nonclassic effects such as squeezing, antibunching, and sub-Poissonian photon statistics have been attracting attention in the quantum optics community in the last decade. Most theoretical and experimental investigations have been carried out exclusively in the time domain, while neglecting the spatial aspects by considering only one spatial mode of the electromagnetic field. In many situations, such an approximation is reasonable and justified. There are, however, problems that do not allow in principle a single-mode consideration. This is the case when one wants to investigate the quantum fluctuations of light at different spatial points in the plane perpendicular to the direction of propagation of the light beam. Such an investigation requires complete description of quantum fluctuations of light in space-time and cannot be done within a single-mode theory. This space-time description brings about a natural generalization into the spatial domain of such notions as the standard quantum limit, squeezing, and anti-bunching.1
© 1998 Optical Society of America
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