Spontaneous parametric down-conversion

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Spontaneous parametric down-conversion

Quality:

Spontaneous parametric down-conversion - important process in quantum optics, used especially as a source of entangled photon pairs, and of single photons. Article “Spontaneous parametric down-conversion” in English Wikipedia has 37.1 points for quality (as of July 1, 2025). The article contains 17 references and 7 sections.

In this language version of Wikipedia the article has the best quality. Also, this article is the most popular in that (English) language version.

In June 2025 the article “Spontaneous parametric down-conversion” was edited by 2 authors in English Wikipedia and written by 2 authors in all languages.

Since the creation of article “Spontaneous parametric down-conversion”, its content was written by 61 registered users of English Wikipedia and edited by 164 registered Wikipedia users in all languages.

The article is cited 67 times in English Wikipedia and cited 172 times in all languages.

The highest Authors Interest rank from 2001:

  • Local (English): #55491 in May 2005
  • Global: #56325 in May 2004

The highest popularity rank from 2008:

  • Local (English): #166342 in October 2015
  • Global: #269019 in October 2015

There are 12 language versions for this article in the WikiRank database (of the considered 55 Wikipedia language editions).

The quality and popularity assessment was based on Wikipédia dumps from July 1, 2025 (including revision history and pageviews for previous years).

The table below shows the language versions of the article with the highest quality.

Languages with the highest quality

#LanguageQuality gradeQuality score
1English (en)
Spontaneous parametric down-conversion
37.1425
2Ukrainian (uk)
Спонтанне параметричне розсіяння
36.0107
3Chinese (zh)
自發參量下轉換
34.1491
4Polish (pl)
Fluorescencja parametryczna
32.5388
5Min Nan (zhminnan)
Chū-hoat chham-liông ē-kha chuán-uāⁿ
28.2881
6Japanese (ja)
自発的パラメトリック下方変換
23.3473
7Catalan (ca)
Conversió descendent paramètrica espontània
21.4842
8Spanish (es)
Conversión paramétrica descendente espontánea
17.5137
9German (de)
Parametrische Fluoreszenz
17.0088
10French (fr)
Convertisseur bas
13.876
More...

The following table shows the most popular language versions of the article.

Most popular in all the time

The most popular language versions of the article "Spontaneous parametric down-conversion" in all the time
#LanguagePopularity awardRelative popularity
1English (en)
Spontaneous parametric down-conversion
581 520
2Russian (ru)
Спонтанное параметрическое рассеяние
39 371
3German (de)
Parametrische Fluoreszenz
36 819
4Chinese (zh)
自發參量下轉換
22 496
5Japanese (ja)
自発的パラメトリック下方変換
21 028
6French (fr)
Convertisseur bas
17 474
7Italian (it)
Conversione parametrica
8 100
8Spanish (es)
Conversión paramétrica descendente espontánea
3 404
9Polish (pl)
Fluorescencja parametryczna
3 368
10Min Nan (zhminnan)
Chū-hoat chham-liông ē-kha chuán-uāⁿ
600
More...

The following table shows the language versions of the article with the highest popularity in the last month.

Most popular in June 2025

The most popular language versions of the article "Spontaneous parametric down-conversion" in June 2025
#LanguagePopularity awardRelative popularity
1English (en)
Spontaneous parametric down-conversion
3 917
2Japanese (ja)
自発的パラメトリック下方変換
207
3Russian (ru)
Спонтанное параметрическое рассеяние
198
4Chinese (zh)
自發參量下轉換
152
5German (de)
Parametrische Fluoreszenz
144
6French (fr)
Convertisseur bas
81
7Spanish (es)
Conversión paramétrica descendente espontánea
57
8Polish (pl)
Fluorescencja parametryczna
38
9Italian (it)
Conversione parametrica
17
10Ukrainian (uk)
Спонтанне параметричне розсіяння
13
More...

The following table shows the language versions of the article with the highest Authors’ Interest.

The highest AI

Language versions of the article "Spontaneous parametric down-conversion" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.
#LanguageAI awardRelative AI
1English (en)
Spontaneous parametric down-conversion
61
2Italian (it)
Conversione parametrica
20
3French (fr)
Convertisseur bas
19
4German (de)
Parametrische Fluoreszenz
16
5Russian (ru)
Спонтанное параметрическое рассеяние
12
6Polish (pl)
Fluorescencja parametryczna
9
7Chinese (zh)
自發參量下轉換
7
8Spanish (es)
Conversión paramétrica descendente espontánea
6
9Japanese (ja)
自発的パラメトリック下方変換
5
10Min Nan (zhminnan)
Chū-hoat chham-liông ē-kha chuán-uāⁿ
4
More...

The following table shows the language versions of the article with the highest Authors’ Interest in the last month.

The highest AI in June 2025

Language versions of the article "Spontaneous parametric down-conversion" with the highest AI in June 2025
#LanguageAI awardRelative AI
1English (en)
Spontaneous parametric down-conversion
2
2Catalan (ca)
Conversió descendent paramètrica espontània
0
3German (de)
Parametrische Fluoreszenz
0
4Spanish (es)
Conversión paramétrica descendente espontánea
0
5French (fr)
Convertisseur bas
0
6Italian (it)
Conversione parametrica
0
7Japanese (ja)
自発的パラメトリック下方変換
0
8Polish (pl)
Fluorescencja parametryczna
0
9Russian (ru)
Спонтанное параметрическое рассеяние
0
10Ukrainian (uk)
Спонтанне параметричне розсіяння
0
More...

The following table shows the language versions of the article with the highest number of citations.

The highest CI

Language versions of the article "Spontaneous parametric down-conversion" with the highest Citation Index (CI)
#LanguageCI awardRelative CI
1English (en)
Spontaneous parametric down-conversion
67
2Russian (ru)
Спонтанное параметрическое рассеяние
18
3French (fr)
Convertisseur bas
16
4Ukrainian (uk)
Спонтанне параметричне розсіяння
11
5German (de)
Parametrische Fluoreszenz
10
6Chinese (zh)
自發參量下轉換
10
7Min Nan (zhminnan)
Chū-hoat chham-liông ē-kha chuán-uāⁿ
10
8Japanese (ja)
自発的パラメトリック下方変換
8
9Catalan (ca)
Conversió descendent paramètrica espontània
6
10Italian (it)
Conversione parametrica
6
More...

Scores

Estimated value for Wikipedia:
English:
Global:
Popularity in June 2025:
English:
Global:
Popularity in all years:
English:
Global:
Authors in June 2025:
English:
Global:
Registered authors in all years:
English:
Global:
Citations:
English:
Global:

Quality measures

Interwikis

#LanguageValue
caCatalan
Conversió descendent paramètrica espontània
deGerman
Parametrische Fluoreszenz
enEnglish
Spontaneous parametric down-conversion
esSpanish
Conversión paramétrica descendente espontánea
frFrench
Convertisseur bas
itItalian
Conversione parametrica
jaJapanese
自発的パラメトリック下方変換
plPolish
Fluorescencja parametryczna
ruRussian
Спонтанное параметрическое рассеяние
ukUkrainian
Спонтанне параметричне розсіяння
zhChinese
自發參量下轉換
zhminnanMin Nan
Chū-hoat chham-liông ē-kha chuán-uāⁿ

Popularity rank trends

Best Rank English:
#166342
10.2015
Global:
#269019
10.2015

AI rank trends

Best Rank English:
#55491
05.2005
Global:
#56325
05.2004

Languages comparison

Important global interconnections (July 2024 – June 2025)

Wikipedia readers most often find their way to information on Spontaneous parametric down-conversion from Wikipedia articles about Quantum entanglement, Nonlinear optics, Optical parametric amplifier, Single photon source and Photon antibunching. Whereas reading the article about Spontaneous parametric down-conversion people most often go to Wikipedia articles on Nonlinear optics, Photon upconversion, Quantum entanglement, Quantum cryptography and Lithium niobate.

Cumulative results of quality and popularity of the Wikipedia article

List of Wikipedia articles in different languages (starting with the most popular):

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About WikiRank

The WikiRank project is intended for automatic relative evaluation of the articles in the various language versions of Wikipedia. At the moment the service allows to compare over 44 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2025. When calculating current popularity and AI of articles data from June 2025 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2025... More information