Anderson talks almost exclusively about his work during the thirties with particles of high energy involved in nuclear reactions. He covers in detail his discovery of the positive electron, his pair production work with gamma rays, his expedition to Pike’s Peak with Neddermeyer and their discovery of the mesotron. He mentions that it was in his speech accepting the Nobel Prize in 1936 that he first mentioned the possibility of negative and positive particles of intermediate mass. After noting the absence of any cosmic ray work during the war years, he mentions the postwar development of cosmic ray work into high energy physics.
This is an interview with David Shoemaker, Senior Research Scientist at MIT, with an affiliation at the Kavli Institute for Astrophysics and Space Research. Shoemaker explains the relationship between LIGO, the MIT Department of Physics, and Kavli, and describes how these relations have changed over the years. He recounts his upbringing in Virginia, then Walla Walla, then Eugene Oregon, and then in New Jersey, where he spent his formative years, as his family moved to accommodate his father’s career. Shoemaker discusses his academic and social troubles in high school, and his undergraduate experience at Drew and then Tufts, where he majored in physics. He explains why he did not complete his undergraduate degree, and how he got to know Rai Weiss and the opportunity he offered to work as a technical instructor in the MIT Junior Lab. Shoemaker describes his decision to enroll in MIT’s graduate program, and he describes the Lab’s role in the COBE endeavor and the FIRAS interferometer project. He describes his work at the Max Planck Institute where he continued his focus on building interferometers, and he explains his decision to move to France to work with Alain Brillet. Shoemaker recounts his decision to return to MIT at the point that Weiss was becoming further involved in the LIGO effort and was forging partnerships with Caltech toward that end. He narrates the point at which MIT institutionally began to support the Lab’s work, and he emphasizes that the support predated any notion of LIGO’s success as a foregone conclusion. Shoemaker explains the early successes and promises of Advanced LIGO, and he provides a detailed account of the detection of gravitational waves, and the significance of this discovery. He describes the day of the Nobel announcement, and reflects on the impact of the attention LIGO received for the prize, for better and worse. Shoemaker discusses the post-Nobel life of LIGO and how, in many ways, the detection should be understood as a starting point for further additional discovery and not just the coda of a decades-long endeavor. At the end of the interview, Shoemaker muses on what lessons might be drawn from his experiences and the improbable nature of his successes in the field relative to the academic challenges he faced earlier in life.
This is an interview with Arati Prabhakar, founder and CEO of Actuate, a nonprofit organization that aims to accelerate American research and development systems. Prabhakar recounts her family’s Indian heritage, and her mother’s decision to immigrate to the United States on her own and pursue a degree in social work. She describes her childhood in Lubbock, Texas and describes being the only student with an Indian background in high school. Prabhakar discusses her undergraduate education at Texas Tech in Lubbock where she majored in electrical engineering, and she describes the opportunities leading to her graduate work in applied physics at Caltech where she worked with Tom McGill on developing quaternary materials. She explains that her interests in real-life problem solving led to a fellowship with the Office of Technology Assessment in Congress, which in turn led to her government service at DARPA. Prabhakar describes her initial work at DARPA on gallium arsenide technology, and she explains the impact of the end of the Cold War on DARPA and on her career. She explains the circumstances leading to her move to NIST to lead the Institute where she focused on building up the Advanced Technology Program and the Manufacturing Extension Partnership. Prabhakar discusses the personal and professional reasons she decided to move to California to work at Raychem in 1997 and then Interval Research, and then Venture Capital, where she worked on funding semiconductor research. She describes her interests in clean energy and how she came back to Washington to head DARPA where there was a major focus on clean energy and pandemic preparedness. Prabhakar explains how and why DARPA operates in the realm of biological research and how she navigated the existential paradox of a leading an agency built on nimbleness within the world’s largest bureaucracy. At the end of the interview, Prabhakar explains how her career in both the private and public sectors prepared her for her current interests in utilizing research and development to confront macrosocial challenges.
Interview covers the development of several branches of theoretical physics from the 1930s through the 1960s; the most extensive discussions deal with topics in quantum electrodynamics, nuclear physics as it relates to fission technology, meson field theory, superfluidity and other properties of liquid helium, beta decay and the Universal Fermi Interaction, with particular emphasis on Feynman's work in the reformulation of quantum electrodynamic field equations. Early life in Brooklyn, New York; high school; undergraduate studies at Massachusetts Institute of Technology; learning the theory of relativity and quantum mechanics on his own. To Princeton University (John A. Wheeler), 1939; serious preoccupation with problem of self-energy of electron and other problems of quantum field theory; work on uranium isotope separation; Ph.D., 1942. Atomic bomb project, Los Alamos (Hans Bethe, Niels Bohr, Enrico Fermi); test explosion at Alamagordo. After World War II teaches mathematical physics at Cornell University; fundamental ideas in quantum electrodynamics crystalize; publishes "A Space-Time View," 1948; Shelter Island Conference (Lamb shift); Poconos Conferences; relations with Julian Schwinger and Shin'ichiro Tomonaga; nature and quality of scientific education in Latin America; industry and science policies. To California Institute of Technology, 1951; problems associated with the nature of superfluid helium; work on the Lamb shift (Bethe, Michel Baranger); work on the law of beta decay and violation of parity (Murray Gell-Mann); biological studies; philosophy of scientific discovery; Geneva Conference on the Peaceful Uses of Atomic Energy; masers (Robert Hellwarth, Frank Lee Vernon, Jr.), 1957; Solvay Conference, 1961. Appraisal of current state of quantum electrodynamics; opinion of the National Academy of Science; Nobel Prize, 1965.
In this interview, Corey Gray, Senior Operations Specialist at the LIGO Hanford Observatory, describes daily administrative and research life at the Observatory, and he recounts his family’s Siksika/Blackfoot heritage on his mother’s side and his Mormon heritage on his father’s side. He recounts his childhood in Southern California and how he navigated his Native American identity throughout his education from public schools through Humboldt State, where he majored in physics. Gray describes the opportunities after college leading to his employment with LIGO at Caltech, he explains working at LIGO before and after the detection of gravitational waves, he describes those momentous days in September 2015 when the detection was confirmed when he was Lead Operator. He explains some of the technical challenges in developing and maintaining the LIGO detectors, and he emphasizes the importance of the work environment being friendly and inclusive. Gray credits LIGO’s founders and Nobel Prize winners for making everyone feel included in this recognition, and he describes how his mother became involved in his developing interests in becoming a science communicator to the public, and in particular to Indigenous groups. He describes his long term goals to bring more Indigenous students into science and he explains the development of the Society of Indigenous Physicists, and at the end of the interview, Gray conveys his optimism both for LIGO and for the continuing value of his outreach efforts.
In this interview, Jed Buchwald, Doris and Henry Dreyfuss Professor of History of Caltech, discusses his life and career. He recounts: his upbringing on the Upper East Side of Manhattan; undergraduate experience at Princeton, where his initial plan was to study physics, until he met Thomas Kuhn whose influence compelled him to switch to history of science; involvement in student protests at Princeton in the late 1960s; decision to move to Harvard for graduate school where he worked with Erwin Hiebert on the history of electrodynamics in the late 19th century; his first academic appointment at the Institute for History and Philosophy of Science and Technology at the University of Toronto, and the different standards applied to the tenure process then compared to now; how the field of history of physics started to trend away from a technical to a more cultural and social perspective in the mid-1980s; his work as director of the Institute; his contribution to the Einstein Papers project during his time at Massachusetts Institute of Technology (MIT), where he served as inaugural director of the Dibner Institute; his opposition to the rise of postmodernism as a scholarly approach to history of science, and the absence of evidentiary and logical reasoning that permeates postmodern jargon; his scholarship on Heinrich Hertz; the writing process and inspiration for Newton and the Origin of Civilization, Histories of the Electron, and Zodiac of Paris; the personal and professional considerations that led to his faculty appointment at Caltech; his longtime collaboration with Allan Franklin. At the end of the interview Buchwald reflects on the common themes that connect his body of scholarship, and in particular, his interest in focusing on historical subjects who were themselves deeply invested in their work.
In this interview, David Zierler, Oral Historian for AIP, interviews George Wallerstein, Professor Emeritus at the University of Washington. Wallerstein recounts his childhood in Manhattan and he describes how the atomic attacks on Japan fostered his interest in science as a teenager. He discusses his undergraduate experience at Brown University where he pursued his interests in astronomy and in some of the philosophical underpinnings of physics. Wallerstein describes his graduate work at Caltech, at a time when the Astronomy department was only five years old, and where he focused on the origins of elements in star formation and the spectra of type II Cepheids. Wallerstein discusses his postdoctoral research at Berkeley and subsequent promotion to the faculty there, and he explains the advances made possible with the advent of digital detectors in the mid-1980s which replaced photographic analysis of high-dispersion spectra. He describes the opportunity leading to his tenure at the University of Washington, and he explains the significance of his work on G dwarf stars and the utility of the Hubble Space Telescope to investigate interstellar lines in supernova remnants. At the end of the interview, Wallerstein surveys some of the key advances to which he has contributed over the course of his career, including infrared astronomy and star positioning.
In this interview, David Zierler, Oral Historian for AIP, interviews Edmund Bertschinger, professor of physics at MIT. Bertschinger recounts his childhood in California and he describes how his natural curiosities developed into academic talents in math and science. He describes his undergraduate work at Caltech where he became interested in radio astronomy. Bertschinger describes his decision to pursue a Ph.D. under the direction of Arno Penzias at Princeton, and he explains the formative influence of Steve Weinberg’s book The First Three Minutes. He describes how he came to work with Jerry Ostriker on galaxy formation. Bertschinger describes some of the administrative decisions that defined where cosmology and astrophysics were studied at Princeton. He explains how he developed his interest in social issues including nuclear disarmament, and why he initially pursued a career at the State Department. Bertschinger discusses his postdoctoral work at the University of Virginia with Roger Chevalier and his next postdoctoral position at Berkeley where he worked with Chris McKee. He explains the importance of charge-coupled device detectors as a key technology advance for astronomy, and he describes the circumstances leading to his decision to join the faculty at MIT. Bertschinger recounts how his social interests had became increasingly focused on gender issues and how, in his view, the toxic masculinity that pervaded cosmology pushed him further and further from the field. He describes his ongoing interest in nuclear and social issues, and at the end of the interview, Bertschinger explains that he has been fortunate to have been able to shift his current research interests while remaining within the physics department.
In this interview, David Zierler, Oral Historian for AIP, interviews John Schwarz, Harold Brown Professor of Theoretical Physics, Emeritus, at Caltech. He describes his family background as a childhood of European emigres, both of whom were scientists, and who escaped Nazi persecution at the beginning of World War II. Schwarz recounts his childhood in Rochester and then on Long Island, and he describes his undergraduate experience at Harvard, where he studied mathematics. Schwarz explains how his interests in the “real world” drew him to physics, which he pursued in graduate school at Berkeley and where he worked with Geoffrey Chew on pursuing a theory of the strong nuclear force. He explains Chew’s conclusion that quantum field theory was not relevant toward developing a theory on the strong nuclear force, and he proposed, alternatively, the S-matrix, which in turn was overtaken by the Yang-Mills gauge theory known as quantum chromodynamics. Schwarz explains how Veneziano’s Eular beta function grew out of the S-matrix program, which extended into a new theory called the dual resonance model, which came to be known as string theory because the model was understood as a kind of quantum theory of one-dimensional objects called strings. Schwarz recounts his contributions to these developments during his time at Princeton, where he collaborated with David Gross, André Neveu, and Joël Scherk. He discusses the significance of Claud Lovelace’s work at CERN, where he found that singularities could be made into poles, and he explains how the second string theory came about in 1971 which required ten spacetime dimensions. Schwarz explains why string theory was not part of the work Glashow and Georgi were doing to unify the three forces of electromagnetism, weak interactions, and strong interactions within a larger gauge symmetry. He describes Feynman’s reluctance in accepting QCD but why, in the end, it proved to be the superior way to explain the strong nuclear force. Schwarz describes his decision to join the faculty of Caltech with the encouragement of Gell-Mann, and he explains the ongoing value of string theory even with QCD firmly established, because it gives gauge theory interactions. He recounts the “second revolution” of string theory in 1984 and his work with Michael Green, and he describes the initial optimism that supersymmetry would be discovered with the advent of the LHC. Schwartz describes Ed Witten’s rising stature in the field, and he shares his views on why thousands of people remain captivated by string theory today. He provides a response to the common criticism that string theory is untestable, and he explains the significance of Juan Maldacena’s discovery of the connection between string theory and conformally invariant field theories. At the end of the interview, Schwarz reviews what among the original questions in string theory he feels have been answered, and which remain subjects of inquiry, including his interest in new approaches to quantum gravity.
In this interview, David Zierler, Oral Historian for AIP, interviews Cliff Will, Distinguished Professor of Physics at the University of Florida. He recounts his childhood in Ontario, Canada, and explains his decision to enroll at McMaster University, which was both nearby and offered an excellent physics program. He describes his studies with Bertram Brockhouse and how he developed his skills and interests in theory. Will explains his early impressions of Caltech, and how different California felt in the late 1960s. He describes his graduate research in general relativity under the direction of Kip Thorne, and he explains the significance of his calculation of the n-body equations of motion, which was the first post-Newtonian approximation of general relativity. Will explains the import of recent experimental advances in general relativity and how this advanced theoretical work. He describes his postdoctoral research at the Fermi Institute and his attraction at the concept of working with Chandrasekhar. He explains his decision to join the faculty at Stanford, and the state of the field in general relativity and gravitational radiation in the early 1970s. Will describes the circumstances leading to his work at Washington University and the research he did at the McDonnell Center for Space Sciences. He discusses his service work for the National Research Council and his advisory position on the Stanford-NASA space mission called Gravity Probe-B. Will describes his interest in conveying scientific concepts to the broader public, and the excitement he felt in joining the LIGO collaboration. He discusses his recent research interests at the University of Florida and his ongoing collaborations in France. At the end of the interview, Will reflects on what has been confirmed and improved in the field of general relativity since the time of Einstein.
