# Fame.am profile — machine-readable export
# Canonical URL: https://fame.am/person/leonard-parker
# Generated: 2026-08-13T22:26:11.332Z

schema: https://schema.org/Person
url: "https://fame.am/person/leonard-parker"
name: "Leonard Parker"
slug: "leonard-parker"
description: "Leonard Emanuel Parker is a distinguished professor emeritus of physics and a former director of the Center for Gravitation and Cosmology at the University of Wisconsin–Milwaukee. During the late 1960s, Parker established a new area of physics—quantum field theory in curved spacetime. Specifically, by applying the technique of Bogoliubov transformations to quantum field theory with a changing gravitational field, he discovered the physical mechanism now known as cosmological particle production. His breakthrough discovery has a surprising consequence: the expansion of the universe can create particles out of the vacuum.\nHis work inspired research by hundreds of physicists and has been cited in more than 2,000 research papers; it was credited in the memoirs of Soviet physicist Andrei Sakharov and helped Stephen Hawking discover the creation of particles by black holes."
tagline: "American physicist"
gender: "male"
country:
  name: "United States"
  isoCode: "US"
category:
  name: "Scientists"
  slug: "scientists"
profileType:
  name: "Scientist"
  slug: "scientist"
  entityType: "https://www.wikidata.org/entity/Q39631"
birthDate: "1938-05-13"
livingStatus: "LIVING"
scores:
  popularity:           37.36
  momentum:             0
  historical:           6.337473333333334
  currentAttention:     0
  sourceConfidence:     39.99999999999999
  profileCompleteness:  55
  trendDirection:       "FALLING"
ranks:
  global:   null
  country:  null
  category: null
sources:
  - url: "https://ta.wikipedia.org/wiki/%E0%AE%87%E0%AE%B2%E0%AE%BF%E0%AE%AF%E0%AF%8B%E0%AE%A9%E0%AE%BE%E0%AE%B0%E0%AF%8D%E0%AE%9F%E0%AF%81_%E0%AE%AA%E0%AE%BE%E0%AE%B0%E0%AF%8D%E0%AE%95%E0%AF%8D%E0%AE%95%E0%AE%B0%E0%AF%8D"
    title: "இலியோனார்டு பார்க்கர்"
    type:  "WIKIPEDIA"
  - url: "https://ar.wikipedia.org/wiki/%D9%84%D9%8A%D9%88%D9%86%D8%A7%D8%B1%D8%AF_%D8%A8%D8%A7%D8%B1%D9%83%D8%B1"
    title: "ليونارد باركر"
    type:  "WIKIPEDIA"
  - url: "https://arz.wikipedia.org/wiki/%D9%84%D9%8A%D9%88%D9%86%D8%A7%D8%B1%D8%AF_%D8%A8%D8%A7%D8%B1%D9%83%D8%B1"
    title: "ليونارد باركر"
    type:  "WIKIPEDIA"
  - url: "https://de.wikipedia.org/wiki/Leonard_Parker"
    title: "Leonard Parker"
    type:  "WIKIPEDIA"
  - url: "https://en.wikipedia.org/wiki/Leonard_Parker"
    title: "Leonard Parker"
    type:  "WIKIPEDIA"
  - url: "https://fa.wikipedia.org/wiki/%D9%84%D8%A6%D9%88%D9%86%D8%A7%D8%B1%D8%AF_%D9%BE%D8%A7%D8%B1%DA%A9%D8%B1"
    title: "لئونارد پارکر"
    type:  "WIKIPEDIA"
  - url: "https://fr.wikipedia.org/wiki/L%C3%A9onard_Parker"
    title: "Léonard Parker"
    type:  "WIKIPEDIA"
  - url: "https://www.wikidata.org/wiki/Q3271532"
    title: "Wikidata"
    type:  "WIKIDATA"

# bio (long form, separated for readability)
bio: |
  Imported from discovery source: wikidata-dump