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This profile was last updated on 6/2/15  and contains information from public web pages and contributions from the ZoomInfo community.

Dimitris Nanopoulos

Wrong Dimitris Nanopoulos?

Employment History

Board Memberships and Affiliations


  • Physics
    University of Athens
  • Ph.D. , High Energy Physics
    University of Sussex
75 Total References
Web References
Contact, 2 June 2015 [cached]
Dimitri V. Nanopoulos, Texas A&M University
COLLEGE STATION - Dr. Dimitri ..., 3 Dec 2009 [cached]
COLLEGE STATION - Dr. Dimitri Nanopoulos, who holds the rank of Distinguished Professor of Physics at Texas A&M University and is one of the world's leading researchers in high-energy physics, has been selected by the Italian Physical Society (SIF) as one of two recipients of its 2009 Enrico Fermi Prize in recognition of his pioneering international work in the field of string theory.
Nanopoulos, who ranks as the fourth most cited high-energy physicist of all time with more than 34,500 citations and 580 referred articles to his credit, is praised by the SIF "for the discovery of fundamental phenomenological properties of grand unification and superstring theories.
"I feel it was quite a surprise, because this is a prize for all of physics, not just my specific field of work," Nanopoulos said. "To be recognized by the SIF, I felt very honored and proud. Something like this helps boost your work and gives you more to look forward to."
Nanopoulos, a member of the Texas A&M faculty since 1989 and holder of the Mitchell-Heep Chair in High-Energy Physics since 2002, also serves as head of the Houston Advanced Research Center (HARC) astroparticle physics group. He is known as one of the founders of Grand Unification Theory (GUT), which seeks to combine gravitation, electroweak and strong forces in an explanation for everything in the Universe. His years of research in string unified theories has led to advances in similar fields of study, such as cosmology, fundamental quantum theory and quantum-inspired models of brain function.
The Fermi Award marks the latest honor in a lengthy list of accolades for Nanopoulos, who was recognized in 2006 by the Alexander S. Onassis Public Benefit Foundation with the Onassis International Prize for his achievements in the natural sciences. In 2005 he was appointed as president of the Greek National Council for Research and Technology and as Greece's national representative to both the European Laboratory for Particle Physics (CERN) and the European Space Agency (ESA). In 1997, he became the youngest member elected to the Academy of Athens' Natural and Applied Sciences.
"We are extremely pleased that Professor Nanopoulos and his research have been recognized with the 2009 Enrico Fermi Prize," said Dr. Edward S. Fry, professor and head of the Department of Physics and Astronomy.
Professor Nanopoulos has a history of striking research achievements, and we anticipate these contributions will continue."
This most recent award is particularly gratifying for Nanopoulos, who cites Fermi as a long-time inspiration for his work. He describes the physicist as hero of his who was both experimental and theoretical, unlike most modern-day scientists, who typically are "one or the other."
"This is one of the reasons I have always tried to model my work after his," he explained. "I have tried to go beyond theoretical precepts and test things experimentally. On one hand, we do theorize, but I've always tried to bridge the gap in between."
A fellow of the American Physical Society (APS) since 1988, Nanopoulos joined the SIF in 1992 and has led more than 400 presentations at various international conferences. A native of Athens, Greece, he is a graduate of the University of Athens and earned his doctorate from the University of Sussex in England.
To learn more about Nanopoulos and his research, visit
» language learning, 31 May 2013 [cached]
These unbelievable ideas belong to the research team of Dimitris Nanopoulos, professor of physics at the University of Texas and member of the Academy of Athens. According to the Athens News Agency, Mr. Nanopoulos ...
Dimitris Nanopoulos . Born ..., 5 Sept 2011 [cached]
Dimitris Nanopoulos . Born in Athens in 1948, he completed his degree in Physics in 1971 from the University of Athens and his Ph.D. in 1973 from the University of Sussex, England. He has made several contributions to particle physics and cosmology working in string unified theories, fundamentals of quantum theory, astroparticle physics and quantum-inspired models of brain function.
Nanopoulos is fellow of the American Physical Society, fellow and chair of Theoretical Physics of Academy of Athens in Greece and Professor of Physics and holder of the Mitchell/Heep Chair in High Energy Physics at Texas A&M University, which he joined in 1989. He is author of more than 515 refereed articles, with an excess of 27000 citations, placing him as the fourth most cited High Energy Physicist of all time (in 2001).
Laura Lee News - Calculations Show The Speed Of Light Might Change, 29 May 2001 [cached]
Dimitri Nanopoulos, who holds the rank of Distinguished Professor of Physics at Texas A&M University and heads the Houston Advanced Research Center's Group for Astroparticle Physics, established, along with other physicists, that the speed of light, instead of being the constant value of 186,282 miles per second, might change.
In 1905, Einstein established that light was the only object to have a constant speed in all reference frames.This idea was the cornerstone to his theory of relativity, and later to laws of physics.
"If the speed of light proves not to be constant any more, even by a very small changeable amount, laws of physics - the theory of relativity included - will have to undergo significant changes," says Nanopoulos.Nanopoulos, who chairs the Theoretical Physics Division of the Academy of Athens, is among the many physicists who are trying to establish the basis of quantum gravity, a theory that has been dreamed of by physicists since the 1920s.
While they were doing mathematical calculations, Nanopoulos and physicists Nikolaos Mavromatos of King's College in London and John Ellis of the European Center for Particle Physics (CERN) in Geneva, discovered a new expression for the speed of light, which depends on its frequency.
"Through our calculations, we found that the speed of light is frequency-dependent," says Nanopoulos.
The hypotheses put forward by Nanopoulos and his collaborators has been under experimental scrutiny, and the results obtained during the last few months are encouraging.
"One way to experimentally test our hypothesis is to consider galaxies or other objects in the sky that are very far from us," says Nanopoulos."Then we collect the photons (particles of light) simultaneously emitted by these sources, and we look at differences of arrival times in a detector on earth between photons of different frequencies.The photons of higher frequencies should come later."
The frequency-dependent expression of the speed of light depends on the gravitational constant, a quantity that is known since Newton established his law of gravitation.
By using the differences in photon arrival times of six astronomical sources, Nanopoulos and his collaborators estimated an upper bound of the value of the gravitational constant from the data, and compared their results with the expected value.
"We were amazed to see that if we use all these astronomical data, we find very reasonable values for the gravitational constant," says Nanopoulos.
"The most energetic of these photons were expected to interact with other very low-energy photons from the infrared background radiation, which is a radiation present since the early universe," says Nanopoulos."When a very energetic photon interacts with a low-energy photon, they have just the right quantity of energy to create an electron-antielectron pair.But physicists at HEGRA did not see any of the expected electron-antielectron pairs, but did observe very energetic photons instead.
"By using the frequency-dependent expression of the speed of light, Kifune, Protheroe and Meyer found that the combined energy of each type of photon was not enough to create an electron-antielectron pair," adds Nanopoulos.
If by looking at more energetic photons, HEGRA never detects the expected electron-antielectron pairs, this would provide further support of the new hypothesis put forward by Nanopoulos and his collaborators.
"This frequency-dependence of the speed of light changes drastically our view of the theory of relativity," Nanopoulos says."It is also the first time that we have a window of opportunity to study quantum gravity, and thus scientifically study the origin of the Universe.It is a fantastic thing that we can experimentally magnify such a tiny effect."
Nanopoulos says that if the frequency-dependence of the speed of light is further confirmed by other experiments, the theory of relativity would still be valid under certain circumstances.
"There is nothing wrong with Einstein's theory of relativity.If the energy of an object is much smaller than 1019 proton masses or if the distance between two objects is smaller than millions of light-years, Einstein's equations are still valid," he says.
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