Abstract
A rigorous QED theory of electrical-feedback arrangements in optics, based on the Feynman path-integral approach, is presented. It is shown that a feedback arrangement by itself is not capable of producing quantum states of light. For this state of light to appear in the operating loop, the latter should contain at least one device emitting light in a quantum state without feedback. A QED discussion of the Yamamoto-type arrangement with a source of light in a quantum state shows that the conventional corpuscular picture of light fails to describe the properties of the field emitted under the influence of feedback. A possibility of an experimental verification of this conclusion is discussed.
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Schedule a callMore From: Quantum and Semiclassical Optics: Journal of the European Optical Society Part B
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