For the American actor, see Leonard Parker (actor).
Leonard E. Parker
Born
1938 (age 85–86)
New York City, US
Alma mater
Harvard University
Known for
Quantum field theory in curved spacetime
Scientific career
Fields
Quantum physics
Institutions
University of Wisconsin–Milwaukee
Doctoral advisor
Sidney Coleman
Doctoral students
Laura Mersini-Houghton Prakash Panangaden
Leonard Emanuel Parker (born Leonard Pearlman; in 1938) 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.[1]
His 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.[citation needed]
Along with David Toms of Newcastle University, Parker co-wrote a latest addition to graduate-level textbooks on quantum field theory in curved spacetime, entitled Quantum Field Theory in Curved Spacetime: Quantized Fields and Gravity (Cambridge University Press, 2009, ISBN 978-0-521-87787-9).
He received his PhD from Harvard University in 1967. His advisor was Sidney Coleman.
^Parker, Leonard; Navarro-Salas, Jose (2017). "Fifty years of cosmological particle creation". arXiv:1702.07132 [physics.hist-ph].
Leonard Emanuel Parker (born Leonard Pearlman; in 1938) is a distinguished professor emeritus of physics and a former director of the Center for Gravitation...
one of the executive producers of his debut feature film Looking for Leonard. Parker starred opposite Christian Slater in the drama The Good Shepherd (2004)...
earning just over $4.6 million on a $24 million budget. Bill Cosby plays LeonardParker, a retired CIA spy who now operates a restaurant. According to the opening...
swept by the Golden State Warriors in the Conference Finals after Kawhi Leonard’s ankle injury in Game 1, forcing him to miss the rest of the series. The...
Randolph Severn "Trey" Parker III (born October 19, 1969) is an American actor, animator, writer, producer, director, and musician. He is best known for...
first two rounds of the playoffs, the Spurs—who suffered injuries to Leonard, Parker, and David Lee—were swept by the Golden State Warriors in the Western...
princess in 1951. On 29 December 1951, Parker married LeonardParker, and together they had six children. Parker died on 20 May 2011 in Anadarko, Oklahoma...
in the Lehigh Valley. Air Products was founded in Detroit in 1940 by LeonardParker Pool with the objective of establishing on-site production and sales...
Kawhi Anthony Leonard (/kəˈhwaɪ/ kə-WHY; born June 29, 1991) is an American professional basketball player for the Los Angeles Clippers of the National...
a police officer and training with guns. However, when he was 18, Ellen Parker, his father's former partner, told him the truth: His father is still alive...
rematch, the Spurs defeated the Heat 4–1 for their 5th title overall. Kawhi Leonard was named the Finals Most Valuable Player (MVP), receiving 10 out of 11...
teams, while he and Leonard are the only players to have won the award in both conferences. Johnson, Moses Malone, Durant, and Leonard are the only players...
Roosevelt Hotel to recognize the worst the film industry had to offer in 1987. Leonard Part 6 was the biggest "winner" with three awards out of five nominations...
wrote, produced and starred in the critically panned and box office bomb Leonard Part 6 (1987). He reunited with Poitier in Ghost Dad (1990), and appeared...
Leonard Norman Cohen CC GOQ (September 21, 1934 – November 7, 2016) was a Canadian singer-songwriter, poet, and novelist. Themes commonly explored throughout...
Institute. He married Marion Parker, daughter of an Edgbaston vet, in 1886. They had two sons and two daughters. One son, LeonardParker Gamgee became a renowned...
Bonnie Elizabeth Parker (October 1, 1910 – May 23, 1934) and Clyde Chestnut "Champion" Barrow (March 24, 1909 – May 23, 1934) were American bandits and...
as Duff Anderson Abbey Lincoln as Josie Dawson Yaphet Kotto as Jocko LeonardParker as Frankie Stanley Green as Reverend Dawson Eugene Wood as Johnson Helen...
1938) Peter van Nieuwenhuizen (born 1938) Sergei Novikov (born 1938) LeonardParker (born 1938) Lu Jeu Sham (born 1938) Daniel I. Khomskii (born 1938) Heinrich...
Isaac Charles Parker (October 15, 1838 – November 17, 1896), also known as "Hanging Judge" Parker, was an American politician and jurist. He served as...
Padmanabhan (1957–2021) studied quantum gravity and quantum cosmology LeonardParker (1938–) established the study of quantum field theory within general...
Leonard Albert Kravitz (born May 26, 1964) is an American singer-songwriter, multi-instrumentalist and actor. Born in New York to TV news producer Sy...