Sub-Poissonian laser emission from a single-electron permanently interacting with a single-mode cavity

Details Sub-Poissonian laser emission from a single-electron permanently interacting with a single-mode cavity Sub-Poissonian laser emission from a single-electron permanently interacting with a single-mode cavity

2007-10-13

arxiv.org/abs/0710.2596v1

Physics

Quantum Physics

7 pages, submitted to Phys Rev A

Scientific paper

Quiet (or sub-Poissonian) oscillators generate a number of dissipation events whose variance is less than the mean. It was shown in 1984 by Golubev and Sokolov that lasers driven by regular pumps are quiet in that sense. The purpose of this paper is to show that, as long as the laser-detector system is strictly stationary, quantization of the optical field is not required to explain such phenomena. The theory presented here is semi-classical, yet exact. Previous theories considering excited-state atoms regularly-injected in resonators, on the other hand, do require in principle light quantization. Specifically, we consider a laser involving a single electron permanently interacting with the field and driven by a constant-potential battery, and point out a similarity with reflex klystrons. The detected noise is found to be only 7/8 of the shot-noise level. It is therefore sub-Poissonian. Our calculations are related to resonance-fluorescence treatments but with different physical interpretations.

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