Robert B. Griffiths is the Otto Stern University Professor of Physics at Carnegie-Mellon University. In 1962, he received his PhD in physics from Stanford University. Currently a Fellow of the American Physical Society and member of the National Academy of Sciences of the USA, he received the Dannie Heineman Prize for Mathematical Physics from the American Physical Society in 1984. He is the author or co-author of 130 papers on various topics in theoretical physics, mainly statistical and quantum mechanics.