Philip Pearle

Philip Pearle
Born
Philip Mark Pearle

( 1936-09-24)September 24, 1936
Brooklyn, NY, US
Alma mater
Known forContinuous Spontaneous Localization (CSL) theory
SpouseBetty Deborah Cooper Pearle
Scientific career
FieldsPhysics
Institutions
Thesis (1963)
Doctoral advisorKerson Huang

Philip Mark Pearle (born September 24, 1936) is an American physicist and professor of physics emeritus at Hamilton College, where he taught from 1969 to 2001.

He is known for his contributions to the foundations of quantum mechanics[1][2], particularly the development of the Continuous Spontaneous Localization (CSL) theory, designed to resolve the quantum measurement problem.[3]

Early life and education

Raised in New York City, he attended the Bronx High School of Science from 1949 to 1953. He studied electrical engineering at the Massachusetts Institute of Technology (MIT), in the cooperative program with Bell Labs, earning his B.S. in 1957 and M.S. in 1958, with a master’s thesis on ferroelectric barium titanate.[4] He completed his Ph.D. in physics at MIT in 1963 with a dissertation on Feynman diagram summations and low-energy pion–nucleon scattering.[5]

Academic career

Pearle began his academic career as a teaching assistant at MIT from 1960 to 1963 and then served as an instructor at Harvard University from 1963 to 1966.[4] He held an assistant professorship at Case Institute of Technology from 1966 to 1969 before joining Hamilton College, where he served as assistant professor from 1969 to 1972, associate professor (1972–1976), and professor (1976–2001).[6] He chaired the Physics Department from 1984 to 1994 and was named Hamilton’s first Kenan Professor (1976–1979). Pearle became professor emeritus in 2001.[7]

Research

Pearle’s scientific contribution is the development of the Continuous Spontaneous Localization (CSL) theory of dynamical wave-function collapse.[8][9] A presentation of the theory is given in his 2024 monograph, Introduction to Dynamical Wave Function Collapse, which formulates CSL through a modified (non-Hermitian) Schrödinger equation[10][11] driven by a random field together with a probability rule for that field, and includes an addendum presenting his original, equivalent formulation as a single nonlinear stochastic Schrödinger equation. [12] Beyond CSL, Pearle is cited for work on a Bell-theorem loophole[13], a monograph on the classical electron[14] and foundational studies on the interpretation of quantum theory and early dynamical-collapse models[15]

References

  1. ^ Cartwright, Jon. "Collapse: Has quantum theory's greatest mystery been solved?". New Scientist. Retrieved 2026-02-16.
  2. ^ "Quantum‐mechanics debate". PHYSICS TODAY. 1971-04-01. Retrieved 2026-02-16.
  3. ^ "Quantum untanglement: Is spookiness under threat?". New Scientist. Retrieved 2026-02-16.
  4. ^ a b "Philip Pearle - Faculty Directory". Hamilton College. Retrieved 2026-02-16.
  5. ^ Kistiakowsky, Vera. "Philip Pearle (PhD. Thesis supervisor: Kerson Huang) published Introduction to Dynamical Wave Function Collapse (Oxford University Press, 2024)" (PDF). MIT.
  6. ^ "Hamilton Physics People". physerver.hamilton.edu. Retrieved 2026-02-17.
  7. ^ "Pearle Publishes Paper Extending an Old Theory". Hamilton College. Retrieved 2026-02-17.
  8. ^ Pearle, Philip (1989-03-01). "Combining stochastic dynamical state-vector reduction with spontaneous localization". Physical Review A. 39 (5): 2277–2289. doi:10.1103/PhysRevA.39.2277. ISSN 0556-2791.
  9. ^ Ghirardi, Gian Carlo; Pearle, Philip; Rimini, Alberto (1990-07-01). "Markov processes in Hilbert space and continuous spontaneous localization of systems of identical particles". Physical Review A. 42 (1): 78–89. doi:10.1103/PhysRevA.42.78. ISSN 1050-2947.
  10. ^ Adlam, Emily (2025-01-20). "Review of 'Introduction to Dynamical Wave Function Collapse'". Mathematics, Physics, and Computer Science Faculty Articles and Research. doi:10.1007/s10701-025-00825-6.
  11. ^ "What really happens in Schrödinger's box? | Aeon Essays". aeon.co. Retrieved 2026-02-17.
  12. ^ "Pearle Publishes New Book on Continuous Spontaneous Localization". Hamilton College. Retrieved 2026-02-17.
  13. ^ Pearle, Philip M. (1970-10-15). "Hidden-Variable Example Based upon Data Rejection". Physical Review D. 2 (8): 1418–1425. doi:10.1103/physrevd.2.1418. ISSN 0556-2821.
  14. ^ Pearle, Philip (1982), "Classical Electron Models", Electromagnetism, Boston, MA: Springer US, pp. 211–295, ISBN 978-1-4757-0652-9, retrieved 2026-02-17{{citation}}: CS1 maint: work parameter with ISBN (link)
  15. ^ Henderson, Bob. "Is this our first clue to a world beyond quantum theory?". New Scientist. Retrieved 2026-02-17.
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