Quality of potential harmonics expansion method for dilute Bose-Einstein condensate |
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| Authors: | Anasuya Kundu Barnali Chakrabarti |
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| Affiliation: | (1) Department of Physics, University of Calcutta, 92 A.P.C. Road, Kolkata, 700 009, India;(2) Department of Physics, Lady Brabourne College, P1/2 Surawardi Avenue, Kolkata, 700 017, India |
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| Abstract: | We present and examine an approximate but ab initio many-body approach, viz., potential harmonics expansion method (PHEM), which includes two-body correlations for dilute Bose-Einstein condensates. Comparing the total ground state energy for three trapped interacting bosons calculated in PHEM with the exact energy, the new method is shown to be very good in the low density limit which is necessary for achieving Bose-Einstein condensation experimentally. |
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| Keywords: | Bose-Einstein condensation hyperspherical harmonics method potential harmonics |
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