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Berni Alder

Berni Julian Alder
Berni Alder.jpg
Born (1925-09-09) September 9, 1925 (age 91)
Duisburg, Germany
Residence United States
Nationality Swiss American
Institutions University of California at Berkeley
Lawrence Livermore National Laboratory
University of California at Davis
Alma mater University of California at Berkeley
California Institute of Technology
Doctoral advisor John Gamble Kirkwood
Known for molecular dynamics simulation
Notable awards Boltzmann Medal (2001)
National Medal of Science (2009)

Berni Julian Alder is an American physicist specialized in statistical mechanics, and a pioneer of numerical simulation in physics.

Alder was born in Duisburg, Germany, to Jewish parents, a chemist and a homemaker. After the Nazis came to power, the family moved to Zurich, Switzerland. Fearing invasion by Nazi Germany after the outbreak of World War Two, the family applied for a visa to the United States, which was granted in 1941. They left by sealed train from neutral Switzerland to (formally neutral) Spain, then to Portugal, where they took a ship to the US. Following a stint in the US Navy after US entry into the war, he obtained a B.Sc. in chemistry from the University of California at Berkeley and a master's degree in chemical engineering from the same institution in 1947. He went to the California Institute of Technology to study under John Gamble Kirkwood for his PhD in 1948 and worked for the investigation of phase transitions in hard-sphere gas with Stan Frankel, where he got the idea to use the Monte Carlo method. After he finished at Caltech in 1952, he went to Berkeley and worked part-time at Berkeley to teach chemistry and part-time as a consultant under suggestion of Edward Teller in the nuclear weapons program for the Lawrence Livermore National Laboratory to help with the equations of state. In collaboration with Thomas Everett Wainwright, he developed techniques for molecular dynamics simulation in the mid-1950s, including the liquid-solid phase transition for hard sphere and the velocity autocorrelations function decay in liquids.


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