Theodore A. "Ted" Jacobson (born November 27, 1954) is an American
theoretical physicist
Theoretical physics is a branch of physics that employs mathematical models and abstractions of physical objects and systems to rationalize, explain and predict natural phenomena. This is in contrast to experimental physics, which uses experimen ...
. He is known for his work on the connection between gravity and thermodynamics. In particular, in 1995 Jacobson proved that the Einstein field equations describing relativistic gravity can be derived from thermodynamic considerations.
[Ted Jacobson, "Thermodynamics of Spacetime: The Einstein Equation of State", '']Physical Review Letters
''Physical Review Letters'' (''PRL''), established in 1958, is a peer-reviewed, scientific journal that is published 52 times per year by the American Physical Society. As also confirmed by various measurement standards, which include the ''Journa ...
'', Vol. 75, Issue 7 (August 14, 1995), pp. 1260-1263, , . Also at , April 4, 1995. Also availabl
here
an
here
Additionally available a
an entry
in the Gravity Research Foundation
The Gravity Research Foundation is an organization established in 1948 by businessman Roger Babson (founder of Babson College) to find ways to implement gravitational shielding. Over time, the foundation turned away from trying to block gravity ...
's 1995 essay competition
Mirror link
Lee Smolin
Lee Smolin (; born June 6, 1955) is an American theoretical physicist, a faculty member at the Perimeter Institute for Theoretical Physics, an adjunct professor of physics at the University of Waterloo and a member of the graduate faculty of the ...
, '' Three Roads to Quantum Gravity'' (New York, N.Y.: Basic Books
Basic Books is a book publisher founded in 1950 and located in New York, now an imprint of Hachette Book Group. It publishes books in the fields of psychology, philosophy, economics, science, politics, sociology, current affairs, and history.
H ...
, 2002), pp. 173 and 175, , .
Jacobson is professor of physics at the
University of Maryland
The University of Maryland, College Park (University of Maryland, UMD, or simply Maryland) is a public land-grant research university in College Park, Maryland. Founded in 1856, UMD is the flagship institution of the University System of M ...
's
Center for Fundamental Physics. His current research focuses on the
dark energy
In physical cosmology and astronomy, dark energy is an unknown form of energy that affects the universe on the largest scales. The first observational evidence for its existence came from measurements of supernovas, which showed that the univer ...
problem and
cosmic expansion
The expansion of the universe is the increase in distance between any two given gravitationally unbound parts of the observable universe with time. It is an intrinsic expansion whereby the scale of space itself changes. The universe does not exp ...
.
[Bob Swarup]
"Much Ado About Nothing: Does the vacuum regenerate itself to fill the gaps as spacetime is pulled apart? Could a growing vacuum explain dark energy?"
''FQXi Community'' (Foundational Questions Institute The Foundational Questions Institute, styled FQXi, is an organization that provides grants to "catalyze, support, and disseminate research on questions at the foundations of physics and cosmology." It was founded in 2005 by cosmologists Max Tegmark ...
), May 8, 2009.["Ted Jacobson"](_blank)
''ScientificCommons
ScientificCommons was a project of the University of St. Gallen ''Institute for Media and Communications Management''. The major aim of the project was to develop the world’s largest archive of scientific knowledge with fulltexts freely accessi ...
''. A list of Jacobson's recent publications.
See also
*
Entropic gravity
Entropic gravity, also known as emergent gravity, is a theory in modern physics that describes gravity as an ''entropic force''—a force with macro-scale homogeneity but which is subject to quantum-level disorder—and not a fundamental intera ...
References
External links
*
Smithsonian/
NASA
The National Aeronautics and Space Administration (NASA ) is an independent agency of the US federal government responsible for the civil space program, aeronautics research, and space research.
NASA was established in 1958, succeeding t ...
Astrophysics Data System
The SAO/NASA Astrophysics Data System (ADS) is an online database of over 16 million astronomy and physics papers from both peer reviewed and non-peer reviewed sources. Abstracts are available free online for almost all articles, and full scanned a ...
(ADS
search for articles by Jacobson University of Nottingham
The University of Nottingham is a public university, public research university in Nottingham, United Kingdom. It was founded as University College Nottingham in 1881, and was granted a royal charter in 1948. The University of Nottingham belongs t ...
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mirror search
''University of Maryland''. Contain
this link to Jacobson's
.
''Ted Jacobson's Home Page''at the University of Maryland.
Marco Frasca"Ted Jacobson's deep understanding"
''The Gauge Connection'', March 5, 2009.
1954 births
Living people
21st-century American physicists
University of Maryland, College Park faculty
Theoretical physicists
{{US-physicist-stub