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Bruria Kaufman (; August 21, 1918 – January 7, 2010) was an Israeli American theoretical physicist. She contributed to Albert Einstein's general theory of relativity, to statistical physics, where she used applied spinor analysis to rederive the result of Lars Onsager on the partition function of the two-dimensional Ising model, and to the study of the Mössbauer effect, on which she collaborated with John von Neumann and Harry Lipkin.
She studied mathematics, earning a B.Sc. from Hebrew University of Jerusalem in 1938, and a PhD from Columbia University in 1948. She married the linguist Zellig S. Harris in 1941.
In 1960, she settled on Kibbutz Mishmar Ha'emek in Israel and adopted a daughter, Tami.
Kaufman returned to the US in 1982. They lived in Pennsylvania, where her husband taught. He died in 1992. Kaufman moved to Arizona and married the Nobel laureate Willis Eugene Lamb in 1996, although the marriage ended in divorce. She died in January 2010 at Carmel Hospital in Haifa, following a stay at a nursing home in Kiryat Tiv'on, not far from Haifa. In keeping with her wishes, her body was cremated. Memorial webpage (Hebrew)
Kaufman returned to Israel in 1960 (with Harris) where she became professor at the Weizmann Institute of Science in Rehovot (1960–1971) and later on at the University of Haifa (1972–1988). Prof. Bruria Kaufman‘s main academic contribution was finding an elegant solution based on group theory to the two-dimensional Ising model, together with Lars Onsager in 1949. This solution was much simpler than the solution published by Onsager himself in 1944. The three dimensional Ising model was not solved until this day. In addition, Kaufman published two articles with Albert Einstein and co-authored his book on relativity. In Israel she studied the Mössbauer effect together with Professor Harri Zvi Lipkin and the two published an article together, in which Bruria combined mathematics with the physics of the effect.
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