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Paul Steinhardt

 

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Paul Steinhardt



 
 
Paul J. Steinhardt is the Albert Einstein
Albert Einstein

Albert Einstein was a Germany-born theoretical physics. He is best known for his theory of relativity and specifically mass?energy equivalence, expressed by the equation E = mc2....
 Professor of Science at Princeton University
Princeton University

Princeton University is a private university university located in Princeton, New Jersey, New Jersey, United States. The school is one of the eight universities of the Ivy League and has the largest per-student Financial endowment in the world....
 and a professor
Professor

The meaning of the word professor varies. In some English-speaking countries, it refers to a senior academic who holds a departmental chair, especially as head of the Academic department, or a personal chair awarded specifically to that individual....
 of theoretical physics
Theoretical physics

Theoretical physics employs mathematical models and abstractions of physics in an attempt to explain experimental data taken of the natural world....
. He received his B.S. at the California Institute of Technology
California Institute of Technology

The California Institute of Technology is a private university research university located in Pasadena, California, United States. Caltech maintains a strong emphasis on the natural sciences and engineering....
 and his Ph.D. in Physics at Harvard University
Harvard University

Harvard University is a private university in Cambridge, Massachusetts, Massachusetts, United States, and a member of the Ivy League. Founded in 1636 by the colonial Massachusetts legislature, Harvard is the Colonial Colleges institution of higher learning in the United States....
. He was a Junior Fellow in the Harvard Society of Fellows
Harvard Society of Fellows

The Harvard Society of Fellows is a collection of luminaries selected by Harvard University to be given special honors, upon whom distinctive academic and intellectual opportunities are bestowed....
 and Mary Amanda Wood Professor of Physics at the University of Pennsylvania
University of Pennsylvania

The University of Pennsylvania is a private research university located in Philadelphia, Pennsylvania, United States. Penn is America's first university and is the fourth-oldest institution of higher education in the United States....
 before joining the faculty at Princeton University
Princeton University

Princeton University is a private university university located in Princeton, New Jersey, New Jersey, United States. The school is one of the eight universities of the Ivy League and has the largest per-student Financial endowment in the world....
 in 1998. He is currently the Director of the Princeton Center for Theoretical Science.

He is best known for his work in theoretical cosmology
Physical cosmology

Physical cosmology, as a branch of astronomy, is the study of the largest-scale structures and dynamics of our universe and is concerned with fundamental questions about its formation and evolution....
, where he helped develop the theory of cosmic inflation
Cosmic inflation

In physical cosmology, cosmic inflation is the hypothesis that the wiktionary:nascent universe passed through a phase of exponential growth metric expansion of space was driven by a negative pressure vacuum energy density....
, which attempts to explain the homogeneity and geometry of the universe and the origin of the fluctuations that seeded the formation of galaxies and large-scale structure.






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Paul J. Steinhardt is the Albert Einstein
Albert Einstein

Albert Einstein was a Germany-born theoretical physics. He is best known for his theory of relativity and specifically mass?energy equivalence, expressed by the equation E = mc2....
 Professor of Science at Princeton University
Princeton University

Princeton University is a private university university located in Princeton, New Jersey, New Jersey, United States. The school is one of the eight universities of the Ivy League and has the largest per-student Financial endowment in the world....
 and a professor
Professor

The meaning of the word professor varies. In some English-speaking countries, it refers to a senior academic who holds a departmental chair, especially as head of the Academic department, or a personal chair awarded specifically to that individual....
 of theoretical physics
Theoretical physics

Theoretical physics employs mathematical models and abstractions of physics in an attempt to explain experimental data taken of the natural world....
. He received his B.S. at the California Institute of Technology
California Institute of Technology

The California Institute of Technology is a private university research university located in Pasadena, California, United States. Caltech maintains a strong emphasis on the natural sciences and engineering....
 and his Ph.D. in Physics at Harvard University
Harvard University

Harvard University is a private university in Cambridge, Massachusetts, Massachusetts, United States, and a member of the Ivy League. Founded in 1636 by the colonial Massachusetts legislature, Harvard is the Colonial Colleges institution of higher learning in the United States....
. He was a Junior Fellow in the Harvard Society of Fellows
Harvard Society of Fellows

The Harvard Society of Fellows is a collection of luminaries selected by Harvard University to be given special honors, upon whom distinctive academic and intellectual opportunities are bestowed....
 and Mary Amanda Wood Professor of Physics at the University of Pennsylvania
University of Pennsylvania

The University of Pennsylvania is a private research university located in Philadelphia, Pennsylvania, United States. Penn is America's first university and is the fourth-oldest institution of higher education in the United States....
 before joining the faculty at Princeton University
Princeton University

Princeton University is a private university university located in Princeton, New Jersey, New Jersey, United States. The school is one of the eight universities of the Ivy League and has the largest per-student Financial endowment in the world....
 in 1998. He is currently the Director of the Princeton Center for Theoretical Science.

He is best known for his work in theoretical cosmology
Physical cosmology

Physical cosmology, as a branch of astronomy, is the study of the largest-scale structures and dynamics of our universe and is concerned with fundamental questions about its formation and evolution....
, where he helped develop the theory of cosmic inflation
Cosmic inflation

In physical cosmology, cosmic inflation is the hypothesis that the wiktionary:nascent universe passed through a phase of exponential growth metric expansion of space was driven by a negative pressure vacuum energy density....
, which attempts to explain the homogeneity and geometry of the universe and the origin of the fluctuations that seeded the formation of galaxies and large-scale structure. He introduced the concept of quintessence
Quintessence (physics)

In physics, quintessence is a hypothesis form of dark energy postulated as an explanation of observations of an accelerating universe....
, a time-varying form of dark energy
Dark energy

In physical cosmology & astronomy dark energy is a hypothetical form of energy that permeates all of space and tends to increase the Hubble's law....
 to explain the current accelerating expansion of the universe. His recent work has been on brane cosmology
Brane cosmology

Brane cosmology refers to several theories in particle physics and physical cosmology motivated by, but not exclusively derived from, superstring theory and M-theory....
, especially the ekpyrotic and cyclic
Cyclic model

Cyclic model refers to several cosmological models in which the universe follows infinite, self-sustaining cycles ....
 models. The cyclic theory of the universe is a radical alternative to big bang/inflationary cosmology in which the evolution of the universe is periodic and the key events shaping the large scale structure of the universe occur before the big bang.

Steinhardt also works in condensed matter physics
Condensed matter physics

Condensed matter physics is the field of physics that deals with the macroscopic and microscopic physical properties of matter. In particular, it is concerned with the "condensed" phase that appear whenever the number of constituents in a system is extremely large and the interactions between the constituents are strong....
, where he introduced the concept of quasicrystal
Quasicrystal

Quasicrystals are structure that are both ordered and nonperiodic. They form patterns that fill all the space but lack translational symmetry. Crystallographic restriction theorem allows only 2, 3, 4, and 6-fold rotational symmetries, but quasicrystals display symmetry of other orders ....
s, a novel phase of matter which has symmetries forbidden to ordinary periodic crystal
Crystal

A crystal or crystalline solid is a solid material whose constituent atoms, molecules, or ions are arranged in an orderly repeating pattern extending in all three spatial dimensions....
s. He has made numerous contributions to understanding their mathematical and physical properties. Recently, he has helped develop a photonic quasicrystal (the quasicrystal analogue of a photonic crystal
Photonic crystal

Photonic crystals are periodic optical nanostructures that are designed to affect the motion of photons in a similar way that periodicity of a semiconductor crystal affects the motion of electrons....
) for efficiently trapping and manipulating light in selected wavebands.

He is a Fellow in the American Physical Society
American Physical Society

The American Physical Society was founded in 1899 and is the world's second largest organization of physicists, behind the Deutsche Physikalische Gesellschaft....
 and a member of the National Academy of Sciences
National Academy of Sciences

The National Academy of Sciences may refer to:*National Academy of Sciences of Argentina*Armenian Academy of Sciences*National Academy of Sciences of Belarus...
. In 2002, he received the P.A.M. Dirac Medal from the International Centre for Theoretical Physics
International Centre for Theoretical Physics

The Abdus Salam International Centre for Theoretical Physics was founded in 1964 by Pakistani scientist Abdus Salam . It operates under a tripartite agreement among the Government of Italy, United Nations Educational, Scientific and Cultural Organization, and International Atomic Energy Agency and provides advanced studies and researches...
.

See also

  • Girih tiles
    Girih tiles

    Girih tiles are a set of five tiles that were used in the creation of tiling patterns for decoration of buildings in Islamic architecture. They are known to have been used since about the year 1200 and their arrangements found significant improvement starting with the Darb-i Imam shrine in Isfahan in Iran built in 1453....


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