J. C. Ward

John Clive Ward

J. C. Ward, Memoirs of a Theoretical Physicist (Optics Journal, Rochester, New York, 2004). [PDF]

John Clive Ward was perhaps one of the most brilliant British physicists of the post war era. A contributor to the Standard Model and the creator of the famed Ward Identities his contributions are discussed in several well-known books dealing with theoretical and particle physics.

The Ward Identities have their origin in a 1950 paper published in Physical Review. This was a succinct master piece authored by J. C. Ward and entitled An identity in quantum electrodynamics. Building on previous work by Dyson this elegant letter proved in seven steps one of the most important and celebrated results of renormalization theory. In a following paper, published in 1951, Ward extended the initial result to a set of identities. Today, the Ward Identity or Ward Identities, are standard teachings in theoretical physics and continue to be the focus of considerable research activity. Some four thousand journal physics papers have been published with Ward Identity or Ward Identities either in their titles or abstracts. A much larger number of web sites refer to this subject.

In addition to his profound influence in field theory, and quantum electrodynamics, he made significant and fundamental contributions to quantum mechanics, elementary particle physics, quantum solid-state physics, and quantum statistics. However, his contributions have not yet received the widespread recognition they deserve. It has been said that for decades physicists have made use of his principles and developments "often without knowing it, and generally without quoting him." In this regard, it was Ward whom, in 1947, derived the equation for the quantum entanglement of orthogonal polarizations for two particles propagating in different directions ( | x, y > - | y, x > ).

Born in London, the 1st of August of 1924, John Ward was educated at Oxford. His doctoral advisor was M. H. L. Pryce who, like P. A. M. Dirac, was a student of R. H. Fowler. Following a series of appointments John Ward arrived to Australia in 1967, via Princeton and Johns Hopkins, and played a major role in creating a high-class physics program at Macquarie University . This physics curriculum was based on the now famous Feynman Lectures on Physics and included a superb experimental physics program. Under his influence, and with the assistance of several colleagues (including R. A. Aitchison, C. E. Curnow, E. Laisk, and R. E. B. Makinson), the foundations of a Macquarie physics education became a combination of courses in electromagnetism, quantum physics, solid state physics, advanced electronics, and experimental physics in addition to courses in applied mathematics. At Macquarie he became known for his forceful defense of science, high academic standards, and for his uncompromising honesty. In this regard, he openly and vigorously supported the student science reform movement that permanently changed the degree structure of the university. This transformative innovation strengthened significantly the structure of the sciences at Macquarie and Ward considered it a "most important accomplishment."

Although himself a gifted theoretician John Ward always held a deep rooted respect for experimental physics and engineering. This well balanced and utilitarian philosophy was well reflected in the nature of the Macquarie physics degree.

John Ward was a Fellow of The Royal Society and received several coveted physics awards including the Heinaman Prize, the Hughes Medal, and the Guthrie Medal. His contributions to theoretical physics inspired admiration among his most illustrious peers. In this regard, Sakharov classified him as one of the titans of quantum electrodynamics alongside Dyson, Feynman, Schwinger, and Tomonaga. In 1988 one of his former students met Julian Schwinger at a conference reception in Lake Tahoe. Once Schwinger knew that the young physicist was from Macquarie, he smiled and immediately proceeded to focus the conversation on one topic alone: John Ward.

In an informative and interesting magazine article he was described as a "restrained rather distant Englishman." Distance apart, he was the epitome of a physicist and a scholar,a man who exerted a distinct influence in the education of those physicists who knew him. An accomplished pianist, and french horn player, he spent the last years of his life in Vancouver Island, Canada. During this period, his time was devoted to his physics, wine making, and traveling to places like Europe, Mexico, and the south of South America.

I shared the last couple of days of 1999 and the first day of 2000, with John, in Santiago de Chile, at the foot of the majestic Andes. We discussed a litany of topics from physics to geopolitics. We laughed, tasted wine, and celebrated our achievement at Macquarie. He was looking forward to get back to work on his physics and he suggested teaching jointly a refreshing physics course, for high school teachers in Santiago, similar to a course he had taught back at Macquarie. However, it would not be God's will. John died following a trip to the South Pacific the 6th of May of 2000.

Frank Duarte


Partial publication list of John Clive Ward

Articles on the physics and life of John Clive Ward

Note 1: a biographical note on Australian Physicist Richard ("Dick") H. Dalitz, a long time friend of John C. Ward, is available from Physics at Oxford. A more extensive article including a listing of Dalitz's works is entitled The scientific heritage of Richard Henry Dalitz, FRS (1925-2006) (by I. J. R. Aitchison et al.).

Note 2: in a long series of conversations with Dick Dalitz, whilst preparing the article on John Ward for Physics Today, it became clear to me that Dick was convinced tha John's contribution to the Standard Model was more extensive than accepted by conventional wisdom. Dick also accepted John's relevance to Britain's H-Bomb efforts. This was made explicit in his contribution to the Physics Today article. Further, Dick was working on a book on John's papers and contributions to physics which was the focus of my last conversation with him (Frank Duarte).

Note 3: an article describing a little known idea of John Ward, in the isotope separation field, known in Australia as the Ward Process is described in:

Book citations