FIZIKA B 2 (1993) 2, 73-82
PERTURBATIVE SOLUTION OF INTEGRO-DIFFERENTIAL EQUATION
FOR A SYSTEM OF IDENTICAL BOSONS
TAPAN KUMAR DAS and RAKHI CHATTOPADHYAY
Department of Physics, University of Calcutta, 92 A.P.C. Road,
Calcutta 700 009, India
Received 12 March 1993
We have solved the integro-differential equation for a system of A identical bosons
interacting via two body potentials by applying a perturbative method up to the second
order. Calculated binding energy has been compared with a solution by projection method.
The perturbative solution is found to be fairly reliable for a soft potential and it
improves with increasing particle number (A), whereas other numerical methods become very
difficult with increasing particle number. Thus perturbation method becomes a useful
alternative for large particle number and soft potentials.