Editing Paul Dirac (section)

=== String theory ===
Dirac is seen as having anticipated [[string theory]], with his work on the [[Dirac membrane]] and [[Born–Infeld model|Dirac–Born–Infeld action]], both of which he proposed in a 1962 paper,<ref>{{Cite journal |date=1962-06-19 |title=An extensible model of the electron |url=https://royalsocietypublishing.org/doi/10.1098/rspa.1962.0124 |journal=Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences |language=en |volume=268 |issue=1332 |pages=57–67 |doi=10.1098/rspa.1962.0124 |bibcode=1962RSPSA.268...57D |issn=0080-4630 |last1=Dirac |first1=P. A. M. }}</ref><ref>{{Cite web |title=membrane in nLab |url=https://ncatlab.org/nlab/show/membrane |access-date=2024-06-19 |website=ncatlab.org}}</ref> along with other contributions.<ref name="Kragh 1990-2">{{harvnb|Kragh|1990|pp=198, 348}}</ref><ref name="Sanyuk-2003">{{Cite journal |last1=Sanyuk |first1=Valerii I. |last2=Sukhanov |first2=Alexander D. |date=1 September 2003 |title=Dirac in 20th century physics: a centenary assessment |url=https://ufn.ru/en/articles/2003/9/c/ |journal=Physics-Uspekhi |language=en |volume=46 |issue=9 |pages=937–956 |doi=10.1070/PU2003v046n09ABEH001165 |s2cid=250754932 |issn=1063-7869}}</ref> He also developed a general theory of the quantum field with dynamical constraints,<ref>{{Cite journal |last=Dirac |first=P. A. M. |date=1950 |title=Generalized Hamiltonian Dynamics |journal=Canadian Journal of Mathematics |language=en |volume=2 |pages=129–148 |doi=10.4153/CJM-1950-012-1 |issn=0008-414X|doi-access=free }}</ref><ref>{{Cite journal |last=Dirac |first=P. A. M. |date=1951 |title=The Hamiltonian Form of Field Dynamics |journal=Canadian Journal of Mathematics |language=en |volume=3 |pages=1–23 |doi=10.4153/CJM-1951-001-2 |issn=0008-414X|doi-access=free }}</ref><ref name="Kragh 1990-2" /> which forms the basis of the [[Gauge theory|gauge theories]] and [[Superstring theory|superstring theories]] of today.<ref name="Kragh 1990-2" /><ref name="Cern Courier-2002" /><ref>[[Mikhail Shifman|Misha, S.]], ''Quantum Field Theory II'' ([[Singapore]]: [[World Scientific]], 2019), [https://books.google.com/books?id=EbySDwAAQBAJ&pg=PA287 p. 287].</ref><ref>{{Cite journal |last=Han |first=Xiaosen |date=2016-04-01 |title=The Born–Infeld vortices induced from a generalized Higgs mechanism |journal=Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences |language=en |volume=472 |issue=2188 |pages=20160012 |doi=10.1098/rspa.2016.0012 |issn=1364-5021 |pmc=4892282 |pmid=27274694|bibcode=2016RSPSA.47260012H }}</ref><ref>{{Cite web |title=Biographical and Research Highlights |url=https://www.damtp.cam.ac.uk/events/dirac/dirac/highlights.html |access-date=2024-06-21 |website=Department of Applied Mathematics and Theoretical Physics (DAMTP)}}</ref>