Unified field theory of (the not mathematically well-defined) quantum electrodynamics. One can extend this system to include the weak and strong nuclear forces to get the Einstein–Yang–Mills–Dirac System. The French physicist Marie-Antoinette Tonnelat published a paper in the early 1940s on the standard commutation relations for the quantized spin-2 field. She continued this work in collaboration with Erwin Schrödinger after World War II. In the 1960s Mendel Sachs proposed a generally covariant field theory that did not require recourse to renormalisation or perturbation theory. In 1965, Tonnelat published a book on the state of research on unified field theories. In 1963 American physicist
Unified Theory (band) they relocated to Los Angeles and began recording their debut album. The album was recorded at Stank Face Laboratories and Lucky Dog Studios in Seattle, and was produced by both Thorn and Smith, and mixed by Andy Wallace. Jon Bolton and Matthew Steer contributed additional drums to the recording, while string arrangements were handled by Dave Dysart. In June, Unified Theory shot a music video for their first single "California" with director Bobby G, before touring the US in July. The band's debut album entitled "Unified Theory" was released on August 15, 2000, through 3.33 Music Group in North America