[2] He enrolled in the doctoral program in physics at the State University of New York at Stony Brook and began working under the supervision of Steven Kivelson.
[2] He spent three years as a postdoctoral researcher at the University of Illinois, Urbana-Champaign (formally under the joint supervision of Gordon Baym, Eduardo Fradkin, Paul Goldbart, and Michael Stone[3] at what is now the Institute for Condensed Matter Theory), before taking up an assistant professorship at Princeton in 1995.
Sondhi's most significant contributions include the discovery of skyrmions in the quantum Hall effect (with A. Karlhede, S. Kivelson and E. Rezayi),[5] the identification of a resonating valence bond liquid phase in the triangular lattice quantum dimer model (with R. Moessner),[6] the theoretical prediction of magnetic monopoles in spin ice (with C. Castelnovo and R. Moessner),[7] and for proposing the
[14] In 2012, Sondhi shared the EPS Europhysics Prize with Steven T. Bramwell, Claudio Castelnovo, Santiago Grigera, Roderich Moessner, and Alan Tennant, for the prediction and experimental observation of magnetic monopoles in spin ice.
[15] Sondhi also directed a program on India and the World[16] at the Center for International Security Studies at the Woodrow Wilson School of Princeton University.