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Latin America Optics and Photonics Conference

Superposition effect is always a detector’s response, hence LOCAL. Besides, wave amplitudes do not interact”

Chandrasekhar Roychoudhuri

Published Jan 1, 2014• 0 citations
Publisher

Abstract

The superposition effects are local. The size of the photo detecting molecules is orders of magnitude smaller than wavelengths of light. Further, wave equations imply, wave amplitudes do not re-organize the amplitudes without detecting molecules. Article not available.
DOI
10.1364/laop.2014.lm4a.42

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This chapter explains the basic mathematical framework behind the emergence of the superposition effect as experienced by detectors when simultaneously stimulated by more than one EM wave by modeling the light–matter interaction process in view of the Non-Interaction of Waves property. The growing field of quantum optics does treat the atoms and molecules as quantum dipoles and EM waves mostly as classical waves. The summation of amplitudes implied by the superposition principle is actually carried out by the oscillating dipoles as their single conjoint dipolar stimulation, while constrained by their intrinsic quantum properties. The measurable superposition effects, which are always reported by detectors, are colored by their own unique response characteristics. Thus, one can generate different types of measurable superposition effects simply by changing the quantum characteristics of the detectors.
The physical interaction processes behind the emergence of dark and bright fringes registered by the detectors at the output of optical interferometers is explained. This knowledge should be helpful to interferometrists to make better physical interpretations of their data. The belief in mysterious “interference of single indivisible photon” will disappear once we recognize that the spatial or temporal energy re-distributions are generated by the physical transformation experienced by the detecting molecules drawing energy from all the light beams. The molecules could be photodetectors at the interferometer output, or the beam combining dielectric boundary. The superposition principle (SP), represented by the linear mathematical sum of two or more wave amplitudes, does not represent an observable phenomenon. The superposition effect (SE), represented by the non-linear square modulus of the joint dipolar stimulation of the detectors by all the superposed waves, is observable. We present two laboratory experiments to clarify these points. Both classical beam combiners and quantum detectors are capable of generating superposition fringes of intensity variations. The logic of “quantumness” of light is narrowly relevant only when a quantum detector deciphers the fringes; it is not valid for classical beam combiners. We will also discuss “entanglement” based on these experiments.
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