Philip Warren Anderson (December 13, 1923 – March 29, 2020) was 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 experime ...

and

Nobel laureate The Nobel Prizes ( sv, Nobelpriset, no, Nobelprisen) are awarded annually by the Royal Swedish Academy of Sciences, the Swedish Academy, the Karolinska Institutet, and the Norwegian Nobel Committee to individuals and organizations who make o ...

. Anderson made contributions to the theories of localization,

antiferromagnetism In materials that exhibit antiferromagnetism, the magnetic moments of atoms or molecules, usually related to the spins of electrons, align in a regular pattern with neighboring spins (on different sublattices) pointing in opposite directions. ...

symmetry breaking In physics, symmetry breaking is a phenomenon in which (infinitesimally) small fluctuations acting on a system crossing a critical point decide the system's fate, by determining which branch of a bifurcation is taken. To an outside observe ...

(including a paper in 1962 discussing symmetry breaking in

particle physics Particle physics or high energy physics is the study of fundamental particles and forces that constitute matter and radiation. The fundamental particles in the universe are classified in the Standard Model as fermions (matter particles) an ...

, leading to the development of the

Standard Model The Standard Model of particle physics is the theory describing three of the four known fundamental forces ( electromagnetic, weak and strong interactions - excluding gravity) in the universe and classifying all known elementary particles. It ...

around 10 years later), and

high-temperature superconductivity High-temperature superconductors (abbreviated high-c or HTS) are defined as materials that behave as superconductors at temperatures above , the boiling point of liquid nitrogen. The adjective "high temperature" is only in respect to previou ...

, and to the

philosophy of science Philosophy of science is a branch of philosophy concerned with the foundations, methods, and implications of science. The central questions of this study concern what qualifies as science, the reliability of scientific theories, and the ultim ...

through his writings on emergent phenomena. Anderson is also responsible for naming the field of physics that is now known as

condensed matter physics Condensed matter physics is the field of physics that deals with the macroscopic and microscopic physical properties of matter, especially the solid and liquid phases which arise from electromagnetic forces between atoms. More generally, the su ...

Education and early life

Anderson was born in

Indianapolis, Indiana Indianapolis (), colloquially known as Indy, is the state capital and most populous city of the U.S. state of Indiana and the seat of Marion County. According to the U.S. Census Bureau, the consolidated population of Indianapolis and Mar ...

, and grew up in

Urbana, Illinois Urbana ( ) is a city in and the county seat of Champaign County, Illinois, United States. As of the 2020 census, Urbana had a population of 38,336. As of the 2010 United States Census, Urbana is the List of municipalities in Illinois, 38th-most pop ...

. His father, Harry Warren Anderson, was a professor of plant pathology at the University of Illinois at Urbana; his maternal grandfather was a mathematician at

Wabash College Wabash College is a private liberal arts men's college in Crawfordsville, Indiana. Founded in 1832 by several Dartmouth College graduates and Midwestern leaders, it enrolls nearly 900 students. The college offers an undergraduate liberal arts cu ...

, where Anderson's father studied; and his maternal uncle was a

Rhodes Scholar The Rhodes Scholarship is an international postgraduate award for students to study at the University of Oxford, in the United Kingdom. Established in 1902, it is the oldest graduate scholarship in the world. It is considered among the world' ...

who became a professor of English, also at Wabash College. He graduated from University Laboratory High School in Urbana in 1940. Under the encouragement of a math teacher by the name of Miles Hartley, Anderson enrolled at

Harvard University Harvard University is a private Ivy League research university in Cambridge, Massachusetts. Founded in 1636 as Harvard College and named for its first benefactor, the Puritan clergyman John Harvard, it is the oldest institution of highe ...

to study under a fully-funded scholarship. He concentrated in "Electronic Physics" and completed his B.S. in 1943, after which he was drafted into the war effort and built antennas at the

Naval Research Laboratory The United States Naval Research Laboratory (NRL) is the corporate research laboratory for the United States Navy and the United States Marine Corps. It was founded in 1923 and conducts basic scientific research, applied research, technologic ...

until the end of the

Second World War World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposi ...

in 1945. As an undergraduate, his close associates included particle-nuclear physicist H. Pierre Noyes, philosopher and historian of science

Thomas Kuhn Thomas Samuel Kuhn (; July 18, 1922 – June 17, 1996) was an American philosopher of science whose 1962 book '' The Structure of Scientific Revolutions'' was influential in both academic and popular circles, introducing the term ''paradig ...

and molecular physicist Henry Silsbee. After the war, Anderson returned to Harvard to pursue graduate studies in physics under the mentorship of John Hasbrouck van Vleck; he received his Ph.D. in 1949 after completing a doctoral dissertation titled "The theory of pressure broadening of spectral lines in the microwave and infrared regions."

Career and research

From 1949 to 1984, Anderson was employed by

Bell Laboratories Nokia Bell Labs, originally named Bell Telephone Laboratories (1925–1984), then AT&T Bell Laboratories (1984–1996) and Bell Labs Innovations (1996–2007), is an American industrial Research and development, research and scientific developm ...

New Jersey New Jersey is a state in the Mid-Atlantic and Northeastern regions of the United States. It is bordered on the north and east by the state of New York; on the east, southeast, and south by the Atlantic Ocean; on the west by the Delawa ...

, where he worked on a wide variety of problems in

. During this period he developed what is now called

Anderson localization In condensed matter physics, Anderson localization (also known as strong localization) is the absence of diffusion of waves in a ''disordered'' medium. This phenomenon is named after the American physicist P. W. Anderson, who was the first to su ...

(the idea that extended states can be localized by the presence of disorder in a system) and Anderson's theorem (concerning impurity scattering in superconductors); invented the Anderson Hamiltonian, which describes the site-wise interaction of electrons in a

transition metal In chemistry, a transition metal (or transition element) is a chemical element in the d-block of the periodic table (groups 3 to 12), though the elements of group 12 (and less often group 3) are sometimes excluded. They are the elements that can ...

; proposed

within

(this played a role in the development of the

and the development of the theory behind the

Higgs mechanism In the Standard Model of particle physics, the Higgs mechanism is essential to explain the generation mechanism of the property " mass" for gauge bosons. Without the Higgs mechanism, all bosons (one of the two classes of particles, the other b ...

, which in turn generates

mass Mass is an intrinsic property of a body. It was traditionally believed to be related to the quantity of matter in a physical body, until the discovery of the atom and particle physics. It was found that different atoms and different ele ...

in some

elementary particle In particle physics, an elementary particle or fundamental particle is a subatomic particle that is not composed of other particles. Particles currently thought to be elementary include electrons, the fundamental fermions ( quarks, leptons, ...

s); created the pseudospin approach to the

BCS theory BCS theory or Bardeen–Cooper–Schrieffer theory (named after John Bardeen, Leon Cooper, and John Robert Schrieffer) is the first microscopic theory of superconductivity since Heike Kamerlingh Onnes's 1911 discovery. The theory describes sup ...

superconductivity Superconductivity is a set of physical properties observed in certain materials where electrical resistance vanishes and magnetic flux fields are expelled from the material. Any material exhibiting these properties is a superconductor. Unlike ...

; made seminal studies of non-s-wave pairing (both symmetry-breaking and microscopic mechanism) in the superfluidity of He3, and helped found the area of spin-glasses. He was elected a Fellow of the

American Academy of Arts and Sciences The American Academy of Arts and Sciences (abbreviation: AAA&S) is one of the oldest learned societies in the United States. It was founded in 1780 during the American Revolution by John Adams, John Hancock, James Bowdoin, Andrew Oliver, a ...

in 1963. Anderson spent a year as

Lecturer Lecturer is an academic rank within many universities, though the meaning of the term varies somewhat from country to country. It generally denotes an academic expert who is hired to teach on a full- or part-time basis. They may also conduct re ...

in Cambridge in 1961–1962, and recalled that having

Brian Josephson Brian David Josephson (born 4 January 1940) is a Welsh theoretical physicist and professor emeritus of physics at the University of Cambridge. Best known for his pioneering work on superconductivity and quantum tunnelling, he was awarded the ...

in a class was "a disconcerting experience for a lecturer, I can assure you, because everything had to be right or he would come up and explain it to me after class." Anderson was elected a Fellow of the

in 1963. From 1967 to 1975, Anderson was a professor of theoretical physics at

Cambridge University , mottoeng = Literal: From here, light and sacred draughts. Non literal: From this place, we gain enlightenment and precious knowledge. , established = , other_name = The Chancellor, Masters and Schola ...

. In 1977 Anderson was awarded the

Nobel Prize in Physics ) , image = Nobel Prize.png , alt = A golden medallion with an embossed image of a bearded man facing left in profile. To the left of the man is the text "ALFR•" then "NOBEL", and on the right, the text (smaller) "NAT•" then " ...

for his investigations into the electronic structure of magnetic and disordered systems, which allowed for the development of electronic switching and memory devices in computers. Co-researchers Sir Nevill Francis Mott and

John van Vleck John Hasbrouck Van Vleck (March 13, 1899 – October 27, 1980) was an American physicist and mathematician. He was co-awarded the Nobel Prize in Physics in 1977, for his contributions to the understanding of the behavior of electronic magnetism i ...

shared the award with him. In 1982, he was awarded the

National Medal of Science The National Medal of Science is an honor bestowed by the President of the United States to individuals in science and engineering who have made important contributions to the advancement of knowledge in the fields of behavioral and social scienc ...

. He retired from Bell Labs in 1984 and was

Joseph Henry Joseph Henry (December 17, 1797– May 13, 1878) was an American scientist who served as the first Secretary of the Smithsonian Institution. He was the secretary for the National Institute for the Promotion of Science, a precursor of the Smit ...

Professor Emeritus of Physics at

Princeton University Princeton University is a private research university in Princeton, New Jersey. Founded in 1746 in Elizabeth as the College of New Jersey, Princeton is the fourth-oldest institution of higher education in the United States and one of the ...

. Anderson's writings included ''Concepts in Solids'', ''Basic Notions of Condensed Matter Physics'' and ''The Theory of Superconductivity in the High-Tc Cuprates''. Anderson served on the board of advisors of

Scientists and Engineers for America Scientists and Engineers for America (SEA) was an organization focused on promoting sound science in American government, and supporting candidates who understand science and its applications. SEA was formed on September 27, 2006, and describes it ...

, an organization focused on promoting sound science in American government. In response to the discovery of high-temperature superconductors in 1980s, Anderson proposed Resonating valence bond (RVB) theory to explain the phenomenon. While many found the idea unconvincing, RVB theory proved instrumental in the study of spin liquids. Anderson also made conceptual contributions to the philosophy of science through his explication of emergent phenomena, which became an inspiration for the science of complex systems. In 1972 he wrote an article called "More is Different" in which he emphasized the limitations of reductionism and the existence of hierarchical levels of science, each of which requires its own fundamental principles for advancement. In 1984 he participated in the founding workshops of the

Santa Fe Institute The Santa Fe Institute (SFI) is an independent, nonprofit theoretical research institute located in Santa Fe, New Mexico, United States and dedicated to the multidisciplinary study of the fundamental principles of complex adaptive systems, inclu ...

, a multidisciplinary research institute dedicated to the science of complex systems. Anderson also co-chaired the institute's 1987 conference on economics with

Kenneth Arrow Kenneth Joseph Arrow (23 August 1921 – 21 February 2017) was an American economist, mathematician, writer, and political theorist. He was the joint winner of the Nobel Memorial Prize in Economic Sciences with John Hicks in 1972. In economi ...

and W. Brian Arthur, and participated in its 2007 workshop on models of emergent behavior in complex systems. In 1987, Anderson testified to the US Congress, "against the construction of the

Superconducting Super Collider The Superconducting Super Collider (SSC) (also nicknamed the desertron) was a particle accelerator complex under construction in the vicinity of Waxahachie, Texas. Its planned ring circumference was with an energy of 20 TeV per proton and was ...

(SSC), a 40 TeV proton-proton collider in Texas that would have been the biggest experiment in particle physics. Anderson's opposition to the SSC did not directly lead to its cancellation in 1993—spiralling costs were the main factor - but he was perhaps its most high-profile opponent." He was, "skeptical of the supposed boost it would provide to science in the US and the claim that the spin-offs would provide great return on investment." A 2006 statistical analysis of scientific research papers by José Soler, comparing the number of references in a paper to the number of citations, declared Anderson to be the "most creative" amongst ten most cited physicists in the world. In 2021 Oxford University Press published the biography ''A Mind over Matter: Philip Anderson and the Physics of the Very Many'' by Andrew Zangwill.

Awards and honors

He was awarded the Oliver E. Buckley Condensed Matter Prize in 1964, the

in 1977, the Golden Plate Award of the

American Academy of Achievement The American Academy of Achievement, colloquially known as the Academy of Achievement, is a non-profit educational organization that recognizes some of the highest achieving individuals in diverse fields and gives them the opportunity to meet ...

in 1978, was elected a Foreign Member of the Royal Society (ForMemRS) in 1980, and was elected a member of the

American Philosophical Society The American Philosophical Society (APS), founded in 1743 in Philadelphia, is a scholarly organization that promotes knowledge in the sciences and humanities through research, professional meetings, publications, library resources, and communit ...

in 1991. He was awarded the

in 1982.

Personal life

Anderson was an

atheist Atheism, in the broadest sense, is an absence of belief in the existence of deities. Less broadly, atheism is a rejection of the belief that any deities exist. In an even narrower sense, atheism is specifically the position that there no ...

and was one of 22 Nobel Laureates who signed the

Humanist Manifesto ''Humanist Manifesto'' is the title of three manifestos laying out a humanist worldview. They are the original '' Humanist Manifesto'' (1933, often referred to as Humanist Manifesto I), the ''Humanist Manifesto II'' (1973), and ''Humanism and I ...

. Anderson was also interested in Japanese culture, living there for a time and becoming a 1st

Dan Dan or DAN may refer to: People * Dan (name), including a list of people with the name ** Dan (king), several kings of Denmark * Dan people, an ethnic group located in West Africa **Dan language, a Mande language spoken primarily in Côte d'Ivoir ...

master of the board game Go. The

Nihon Ki-in The Nihon Ki-in (), also known as the Japan Go Association, is the main organizational body for Go in Japan, overseeing Japan's professional system and issuing diplomas for amateur dan rankings. It is based in Tokyo. The other major Go associa ...

awarded him a lifetime achievement award in 2007, and Anderson joked that there were only four people in Japan who could beat him. He died in

Princeton, New Jersey Princeton is a municipality with a borough form of government in Mercer County, in the U.S. state of New Jersey. It was established on January 1, 2013, through the consolidation of the Borough of Princeton and Princeton Township, both of w ...

, on March 29, 2020, at the age of 96.

Publications

Books

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Journal articles

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References

External links