Freeman John Dyson FRS ( born December 15, 1923 ) is a British-born American theoretical physicist and mathematician, famous for his work in quantum electrodynamics, solid-state physics, astronomy and nuclear engineering.

However, the previous year Cossiga had stated that he rejects theoretical conspiracies and that it " seems unlikely that the rather impossible September 11 was the result of an American plot.

* 1962 – Lisa Randall, American theoretical physicist

* 1947 – Michio Kaku, Japanese-born American theoretical physicist

Klaus Emil Julius Fuchs ( 29 December 1911 – 28 January 1988 ) was a German-British theoretical physicist and atomic spy who in 1950 was convicted of supplying information from the American, British and Canadian atomic bomb research ( the Manhattan Project ) to the USSR during and shortly after World War II.

Heitler and London's method was extended by the American theoretical physicist John C. Slater and the American theoretical chemist Linus Pauling to become the Valence-Bond ( VB ) Heitler – London – Slater – Pauling ( HLSP ) method.

Roald Hoffmann ( born July 18, 1937 ) is an American theoretical chemist who won the 1981 Nobel Prize in Chemistry.

G. William Domhoff claims that " The idea of the American state having any significant degree of autonomy from the owners and managers of banks, corporations, and agribusinesses is a theoretical mistake based in empirical inaccuracies ," and cites empirical studies showing a high degree of overlap between upper-level corporate management and high-level positions in government.

Stephen Cole Kleene ( January 5, 1909 – January 25, 1994 ) was an American mathematician who helped lay the foundations for theoretical computer science.

In 1946, American theoretical astrophysicist Lyman Spitzer was the first to conceive the idea of a telescope in outer space, a decade before the Soviet Union launched the first satellite, Sputnik.

Played a key role in the writing of the United States Constitution and providing a theoretical justification for it in his contributions to the Federalist Papers ; author of the American Bill of Rights.

One theoretical approach is that of fuzzy logic, developed by American mathematician Lotfi Zadeh.

William Nunn Lipscomb, Jr. ( December 9, 1919April 14, 2011 ) was a Nobel Prize-winning American inorganic and organic chemist working in nuclear magnetic resonance, theoretical chemistry, boron chemistry, and biochemistry.

** Lisa Randall, American theoretical physicist

Lars Onsager ( November 27, 1903 – October 5, 1976 ) was a Norwegian-born American physical chemist and theoretical physicist, winner of the 1968 Nobel Prize in Chemistry.

Josiah Willard Gibbs ( February 11, 1839 – April 28, 1903 ) was an American scientist who made important theoretical contributions to physics, chemistry, and mathematics.

Working in relative isolation, he became the earliest theoretical scientist in the United States to earn an international reputation and was praised by Albert Einstein as " the greatest mind in American history.

Julius Robert Oppenheimer ( April 22, 1904 – February 18, 1967 ) was an American theoretical physicist and professor of physics at the University of California, Berkeley.

This is not a purely theoretical result but may instead be observed today in bullion coins such as the Canadian Gold Maple Leaf, the South African Krugerrand, the American Gold Eagle, or even the silver Maria Theresa thaler ( Austria ).

Alonzo Church ( June 14, 1903 – August 11, 1995 ) was an American mathematician and logician who made major contributions to mathematical logic and the foundations of theoretical computer science.

* John C. Slater ( 1900 – 1976 ), American physicist and theoretical chemist

* 1915 – Norman Foster Ramsey, Jr., American physicist, Nobel Prize laureate ( d. 2011 )

* 1911 – William Alfred Fowler, American physicist, Nobel Prize laureate ( d. 1996 )

* 1945 – Douglas Osheroff, American physicist, Nobel Prize laureate

* 1901 – Ernest Lawrence, American physicist, Nobel Prize laureate ( d. 1958 )

* 1912 – Frank Oppenheimer, American physicist ( d. 1985 )

* 1925 – George Wetherill, American physicist ( d. 2006 )

* 1847 – Sarah Frances Whiting, American physicist and astronomer ( d. 1927 )

* 1912 – Edward Mills Purcell, American physicist, Nobel Prize laureate ( d. 1997 )

Another criticism is that universities tend more to pseudo-intellectualism than intellectualism per se ; for example, to protect their positions and prestige, academicians may over-complicate problems and express them in obscure language ( e. g., the Sokal affair, a hoax by physicist Alan Sokal attempting to show that American humanities professors invoke complicated, pseudoscientific jargon to support their political positions.

* 1945 – Robert H. Goddard, American physicist and inventor ( b. 1882 )

* 1992 – Gerard K. O ' Neill, American physicist ( b. 1927 )

* 1999 – Rolf Landauer, American physicist and electrical engineer ( b. 1927 )

* 1882 – Percy Williams Bridgman, American physicist, Nobel laureate ( d. 1961 )

The inflationary hypothesis was originally proposed in 1980 by American physicist Alan Guth, who named it " inflation ".

Building on the work of Clausius, between the years 1873-76 the American mathematical physicist Willard Gibbs published a series of three papers, the most famous one being the paper On the Equilibrium of Heterogeneous Substances.

* 1923 – Freeman Dyson, English-born American physicist

* 1958 – Wolfgang Ernst Pauli, Austrian-born American physicist, Nobel laureate ( b. 1900 )

* 1964 – Victor Franz Hess, Austrian-born American physicist, Nobel laureate ( b. 1883 )

* 1932 – German-born Swiss physicist Albert Einstein is granted an American visa.

* 1932 – Sheldon Lee Glashow, American physicist, Nobel laureate

* 1948 – Frank Benford, American electrical engineer and physicist ( b. 1883 )

* 1917 – James Rainwater, American physicist, Nobel laureate ( d. 1986 )

* 1926 – Henry Way Kendall, American physicist, Nobel laureate ( d. 1999 )

* 1934 – John Norris Bahcall, American physicist ( d. 2005 )

Van de Graaff, American physicist and inventor ( d. 1967 )