"This was a very well-organized workshop that proved to be extremely useful for me. At the workshop, I had opportunities to hear about the most recent work in the field in informal settings (ranging from blackboard talks to hikes up Aspen Mountain), to engage in highly productive discussions about outstanding questions, to work with collaborators on existing projects, and to start new collaborations."

In Memoriam



More than 200 volunteers, both physicists and members of the Aspen community, have worked tirelessly for the Center and have helped to shape and make possible the ACP's more than 50 years of successful programs. On this page we remember those individuals who have served and are no longer with us.

Elihu Abrahams, 1927 - 2018: theoretical condensed matter physicist at UCLA. Chair of the Board 1997 - 2000, President 1979 - 1982, Scientific Secretary 1976  - 1977, Trustee 1975 - 1982 & 1991-1994, Honorary Trustee 1983 - 2018, General Member 1976 - 2006.

Lester Anderson, 1921 - 2000: mayor of Eugene, Oregon and former CEO Random Lengths, Inc. Trustee 1988 - 1992, General Member 1988 - 1996, Honorary Member 1996 - 2000.

Philip W. Anderson, 1923 - 2020: theoretical condensed matter physicist at Princeton University. Chair of the Board 1982 - 1986, Trustee 1976 - 1982, Honorary Trustee 1983 - 2020, General Member 1976 - 2004.

Robert O. Anderson, 1917 - 2007: Chair of the Board, Aspen Institute for Humanistic Studies and founder of ARCO. Trustee 1968 - 1981.

Julius Ashkin, 1920 - 1982: particle physicist at Carnegie Mellon University. Trustee 1968 - 1972.

Michel Baranger, 1927 - 2014: theoretical physicist at MIT. Trustee 1968 -1974.

M. A. B. (Baqi) Beg, 1934 - 1990: theoretical particle physicist at the Rockefeller University. Trustee 1981 - 1986.

R. Stephen Berry, 1931 - 2020: biological and chemical physicist at the University of Chicago. Truste 1979 - 1984, General Member 1979 - 1989, Honorary Member 2011 - 2020.

Hans Bethe, 1906 - 2005: theoretical physicist at Cornell. Vice President 1972 - 1973, Trustee 1968 - 1976, Honorary Trustee 1976 - 2005.

Beate Block, 1925 - 2018: Founded the Winter Conferences with her husband, Martin.

Martin Block, 1926 - 2016: Founded the Winter Conferences with his wife, Beate. Honorary Member 1997 - 2016.

A. G. W. Cameron, 1925 - 2005: theoretical astrophysicist at Harvard. Trustee 1972 - 1977.

Peter Carruthers, 1935 - 1997: theoretical particle physicist at Cornell, Los Alamos National Laboratory, and University of Arizona. Chair of the Board 1979 - 1982, Trustee 1975 - 1982, Honorary Trustee 1990 - 1997.

Jessica Catto, 1937 - 2009: journalist and conservationist. General Member 2000 - 2001.

Sidney Coleman, 1937 - 2007: theoretical particle physicist at Harvard University. Trustee 1981 - 1987 & 1995 - 2001, General Member 1981 - 1987 & 1990 - 2005, Honorary Member 1990 - 2007.

Stirling Colgate, 1925 - 2013: theoretical and experimental astrophysicist at Los Alamos National Laboratory. Trustee 1972 - 1978, General Member 1990 - 2004, Honorary Member 2004 - 2013.

Robert Craig, 1925 - 2015: co-founder of the Aspen Center for Physics, founder of the Keystone Center. Vice President 1968 - 1972, Trustee 1968 - 1975, Honorary Trustee 1975 - 2015.

James Watson Cronin, 1931 - 2016: particle physicist at University of Chicago. Trustee 1979 - 1982, Honorary Member 1990 - 2000.

David De Young, 1940 - 2011: theoretical astrophysicist at Kitt Peak National Observatory. President 2001 - 2004, Scientific Secretary 1980 - 1981, Trustee 1973 - 1981 & 1991 - 2001, Honorary Trustee 2006 - 2011, General Member 1990 - 2006.

Maggie DeWolf, 1929 - 2016: philanthropist, Honorary Member, 1998 - 2016.

Nicholas DeWolf, 1928 - 2006: founder of Teradyne. Trustee 1983 - 1990, General Member 1983 - 2003, Honorary Member 2003 - 2006.

Richard Ferrell, 1926 - 2005: theoretical physicist at the University of Maryland. Trustee 1968 - 1972.

Daniel Isaac Fivel, 1933 - 2012: theoretical physicist at the University of Maryland. Trustee 1968 - 1976, Honorary Trustee 1976 - 2012.

Martin Flug, 1931 - 2015: entrepreneur, businessman and philanthropist. Trustee 2006 - 2012, General Member 1996 - 2015.

Stephen Gasiorowicz, 1928 - 2016: high energy physicist at University of Minnesota. Vice President 1979 - 1982, Trustee 1980 - 1986, General Member 1990 - 1994, Honorary Member 1994 - 2014.

Murray Gell-Mann, 1929 - 2019: theoretical particle physicist at Santa Fe Institute. Chair of the Board 1973 - 1979, Vice President 1968 - 1972, Trustee 1968 - 1980, Honorary Trustee 1981 - 2019, General Member 1990 - 2005.

Albert Gilson, 1928 - 2013: doctor of radiology and nuclear medicine. General Member 1993 - 1998.

Steven Gubser, 1972 - 2019: theoretical particle physicist and string theorist at Princeton University. Scientific Secretary 2005 - 2006, General Member 2002 - 2007.

Pierre C. Hohenberg, 1934 - 2017: theoretical physicist at New York University. General Member 1990 - 1993.

Paula Johnson, 1954 - 2016: Financial Manager of Aspen Center for Physics from 2002 - 2016. Updated Policies and Procedures. Greatly enhanced both the data base and the web site.

Peter Kaus, 1924 - 2016: theoretical particle physicist at UC Riverside. President 1982 - 1985, Vice President 1973 - 1979, Scientific Secretary 1968 - 1973, Trustee 1968 - 1980, Honorary Trustee 1981 - 2016, General Member 1990 - 1994, Honorary Member 1994 - 2006.

Leon Max Lederman, 1922 - 2018: theoretical particle physicist at Illinois Math Science Academy. Chair of the Board 1989 - 1992, Trustee 1989 - 1992, Honorary Trustee 1993 - 2018, General Member 1990 - 1992.

Benjamin Lee, 1935 - 1977: theoretical particle physicist at Fermilab. Trustee, 1976 - 1977.

Sydney Meshkov, 1927 - 2020: theoretical particle physicist at Caltech. Secretary 1975 - 1976, Trustee 1974 - 1981, Honorary Trustee 2005 - 2020, General Member 1974 - 2004, Honorary Member 2004 - 2009

Ann Nelson, 1958 - 2019: theoretical particle physicist at University of Washington. General Member 1992 - 1997 & 2017 - 2019.

Richard Norton, 1928 - 2008: theoretical particle physicist at UCLA. Trustee 1986 - 1991, General Member 1986 - 1992, Honorary Member 1992 - 2008.

Heinz Pagels, 1939 - 1988: theoretical particle physicist at Rockefeller University and NY Academy of Sciences. Treasurer 1974 -1979, Scientific Secretary 1973 - 1974, Trustee 1972 - 1981.

David Pines, 1924 - 2018: theoretical condensed matter physicist at UC Davis and founding director of Institute for Complex Adaptive Matter. Vice President 1968 - 1976, Trustee 1968 - 1980, Honorary Trustee 1981 - 2018, General Member 1990 - 2002, Honorary Member 2002 - 2007.

Joseph Polchinski 1954 - 2018: theoretical physicist at UC Santa Barbara and a member of the Kavli Institute for Theoretical Physics. Scientific Secretary 2003 - 2004, General Member 1998 - 2004.

Richard Prange, 1932 - 2008: theoretical condensed matter physicist at University of Maryland. Trustee 1982 - 1988, General Member 1982 - 1988 & 1990 - 1993.

Henry Primakoff, 1914 - 1983: theoretical nuclear physicist at University of Pennsylvania. Trustee 1968 - 1972.

David Schramm, 1945 - 1997: theoretical astrophysicist at the University of Chicago. Chairm of the Board 1992 - 1997, Trustee 1983 - 1990, and General Member 1983 - 1997.

Frederick Seitz, 1911 - 2008: theoretical condensed matter physicist at University of Illinois Urbana-Champaign and President of the Rockefeller University and National Academy of Sciences. Trustee 1968 - 1972.

Richard Slansky, 1940 - 1998: theoretical particle physicist at Los Alamos National Laboratory. Scientific Secretary 1982 - 1983, Trustee 1982 - 1988, General Member 1982 - 1988 & 1990 - 1998, Honorary Member 1993 - 1998.

Joseph Slater, 1922 - 2002: economist and President of the Aspen Institute for Humanistic Studies. Trustee 1969 - 1982.

Gary Steigman, 1941 - 2017: theoretical astrophysicist at Ohio State University. Trustee 1977 - 1983, General Member 1990 -1998.

David Wilkinson, 1935 - 2002: pioneer in the field of cosmology physics at Princeton University. General Member 1990 - 1995.

Robert Rathbun Wilson, 1914 - 2000: sculptor, accelerator physicist at Cornell, and Director of Fermilab. Chairm of the Board 1986 - 1989, Trustee 1969 - 1975, Honorary Trustee 1975 -2000.

Lincoln Wolfenstein, 1923 - 2015: theoretical particle physicist at Carnegie Mellon University. Instrumental in the founding of the Aspen Center for Physics. Trustee 1968 - 1973, General Member 1990 - 1999, Honorary Member 1999 - 2015.

Fredrik Zachariasen, 1931 - 1999: theoretical particle physicist at Caltech. Scientific Secretary, 1979 - 1980, Trustee 1976 -1982, Honorary Member 1992 - 1999.