Daniel Harry Friedan (born October 3, 1948)[1] is an American theoretical physicist and one of three children of the feminist author and activist Betty Friedan.[2]


Education and career

He earned his Ph.D. from the University of California, Berkeley in 1980 and was named a MacArthur Fellow in 1987.[3][4]

Friedan has worked in string theory and condensed matter theory, specializing in (1 + 1)-dimensional systems. His current research focuses on applications to quantum computers.

Friedan received the 2010 Lars Onsager Prize from the American Physical Society "for seminal work on the classification and characterization of two-dimensional unitary conformal field theories of critical states."[5]

Personal life

Daniel is married to an Icelandic physics teacher, Ragnheiður Guðmundsdóttir. They have two daughters and one son together.


  1. ^ Judith Adler Hennessee, Betty Friedan: her life, Random House, 1999, p.50
  2. ^ Feminist author, icon Betty Friedan dies at 85, USA Today, February 4, 2006. Accessed August 1, 2011
  3. ^ American Physical Society Recognizes Rutgers Professors for Outstanding Research, Rutgers University newstelease, March 16, 2010. Accessed August 1, 2011
  4. ^ MacArthur `Genius Awards' To 32; Honors List Includes Washington Writer, Washington Post, June 16, 1987
  5. ^ 2010 Lars Onsager Prize Recipient, American Physical Society. Accessed August 1, 2011