Input-output picture based on the modes of the universe: Applications to squeezed light
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abstract
The recent realization of squeezed states and phase-noise quenching via correlated spontaneous emission have sharpened the question of the relationship of quantum noise inside and outside a transmitting cavity. Although many authors have succeeded in demonstrating that the degree of quantum noise reduction in the transmitted field can be quite different from (and even much larger than) that in the intracavity field, a rigorous yet simple physical picture of the reasons for this fact has not emerged. The authors provide such a picture that is both rigorous and intuitively appealing and illustrate it with the aid of model systems.