**Sadhan Adhikari **

Sadhan Kumar Adhikari is an Indian professor of physics, since 1991, at the Institute of Theoretical Physics (IFT) of the São Paulo State University (UNESP).In his publication (coauthored with I. H. Sloan) in Physical Review C journal he studied seprable approximations to S-wave Yukawa potentials.[2] In 1986 he formulated the quantum scattering theory in two dimensions and wrote Lippmann–Schwinger equations and the asymptotic wave function for scattering.[3] From 2002[4] to 2009[5] he and Paulsamy Muruganandam used Gross-Pitaevskii equation to study Bose-Einstein condensation using FORTRAN 77 programs. In 2004-2005 he used the Gross-Pitaevskii equation to understand the formation of bright solitons in a Bose-Einstein condensate.[6] In 2012 he, Antun Balaž, and colleagues from the Institute of Physics, Scientific Computing Laboratory, Belgrade wrote C programs to solve Gross–Pitaevskii equation and study Bose–Einstein condensates using the Crank–Nicolson method.[7] He is the author of two books on scattering theory published by Academic Press, San Francisco, Hard cover (1988), [8] Paperback (2012) and eTextbook (2012) and by John Wiley & Sons, New York, 1998 [9]