Three measures of fidelity for photon states

• URL: http://arxiv.org/abs/2009.13842v1
• Date: Tue, 29 Sep 2020 08:12:43 GMT
• Title: Three measures of fidelity for photon states
• Authors: Iwo Bialynicki-Birula and Zofia Bialynicka-Birula
• Abstract summary: The treatment of photons as elementary particles merges smoothly with the description in terms of the quantized electromagnetic field. The most striking result is the appearance of various measures of fidelity for quantum states of photons.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We show that the standard method of introducing the quantum description of the electromagnetic field -- by canonical field quantization -- is not the only one. We have chosen here the relativistic quantum mechanics of the photon as the starting point. The treatment of photons as elementary particles merges smoothly with the description in terms of the quantized electromagnetic field but it also reveals some essential differences. The most striking result is the appearance of various measures of fidelity for quantum states of photons. These measures are used to characterize the localization of photons.

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