@misc{ _degree_2014,
  title = {Degree of coherence},
  copyright = {Creative Commons Attribution-ShareAlike License},
  url = {http://en.wikipedia.org/w/index.php?title=Degree_of_coherence&oldid=602568847},
  abstract = {In quantum optics, correlation functions are used to characterize the statistical and coherence properties of an electromagnetic field. The degree of coherence is the normalized correlation of electric fields. In its simplest form, termed , it is useful for quantifying the coherence between two electric fields, as measured in a Michelson or other linear optical interferometer. The correlation between pairs of fields, , typically is used to find the statistical character of intensity fluctuations. First order correlation is actually the amplitude-amplitude correlation and the second order correlation is the intensity-intensity correlation. It is also used to differentiate between states of light that require a quantum mechanical description and those for which classical fields are sufficient. Analogous considerations apply to any Bose field in subatomic physics, in particular to mesons (cf. Bose–Einstein correlations)},
  language = {en},
  urldate = {2015-01-06TZ},
  journal = {Wikipedia, the free encyclopedia},
  month = {December},
  year = {2014},
  note = {Page Version ID: 602568847}
}

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