American Philosophical Society
Member History

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1. Mathematical and Physical Sciences[X]
106. Physics[X]
1Name:  Dr. Christopher John Pethick
 Institution:  Nordita; Niels Bohr International Academy
 Year Elected:  2016
 Class:  1. Mathematical and Physical Sciences
 Subdivision:  106. Physics
 Residency:  International
 Living? :   Living
 Birth Date:  1942
Christopher Pethick is a theoretical physicist of remarkable breadth and depth, whose seminal contributions to neutron star, ultracold atomic gas, and condensed matter physics have been recognized by his Onsager Prize for statistical physics and Bethe Prize for theoretical astrophysics. He gave the first consistent description of neutron stars, from their low density crust to their superfluid interior, their behavior during stellar collapse and subsequent cooling, and identified compact X-ray sources as accreting neutron stars. He provided the microscopic basis of our current understanding of liquid helium-3 at nonzero temperature, showed how related ideas could be used to understand the transport properties of heavy-fermion materials, and in a very different context, quark matter at high densities. Recently he has bridged the gap between atomic and condensed-matter physics by his imaginative application of condensed matter concepts to ultracold atomic gases. His major influence on Scandinavian science has been recognized by his election to the Royal Danish and Norwegian Academies of Sciences and Letters.
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