A.B., Physics, 1977, Harvard University.

Ph.D. Physics, 1981, Cornell University.

Harvard Society of Fellows, 1981-84.

Assistant Professor, Physics, Harvard University, 1984-1986.

Associate Professor, Physics, Harvard University, 1986-1990.

Technical Staff Member, Los Alamos National Laboratory, 1990-2001.

Professor, Physics and Information Science, Cornell University, 2001- present.

Visiting appointments at: C.E.N. Saclay, France; Princeton University; Stanford Linear Accelerator Center; The Institute for Advanced Studies, Princeton; The Institute for Theoretical Physics at UC Santa Barbara; The Mathematical Science Research Institute at UC Berkeley; Hebrew University, Jerusalem.

A.P. Sloane fellow, 1986-1990. DOE Outstanding Junior Investigator, 1986-91. Fellow, American Physical Society. MacArthur Fellow, 2002. Radcliffe Institute Fellow, 2008-2009.