Squeezing in Two-Atom Resonance Fluorescence
Squeezing — a new nonclassical effect in radiation theory — has recently become the subject of extensive discussion (Milburn and Walls 1981 and 1983, Walls and Zoller 1981, Mandel 1982a and b, Lugiato and Strini 1982, Kozierowski and Kielich 1983). It is characterized by a field state in which the variance of two noncommuting observables is less than one half of the absolute value of their commutator. The obtaining of squeezed states in experiment would give the opportunity to reduce quantum fluctuations in one quadrature component of the field at the expense of increased fluctuations in the other component. The interest in such states is stimulated by their potential use to reduce fluctuations due to quantum noise in the Michelson interferometer to detect gravity waves (Caves 1981) as well as their possible applications in optical communication systems (Yuen and Shapiro 1979).
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