Physics – Condensed Matter
Scientific paper
2002-09-18
Phys. Rev. Lett. 89, 210404 (2002)
Physics
Condensed Matter
Scientific paper
10.1103/PhysRevLett.89.210404
We derive the explicit three body contact potential for a dilute condensed Bose gas from microscopic theory. The three body coupling constant exhibits the general form predicted by T.T. Wu [Phys. Rev. 113, 1390 (1959)] and is determined in terms of the amplitudes of two and three body collisions in vacuum. In the present form the coupling constant becomes accessible to quantitative studies which should provide the crucial link between few body collisions and the stability of condensates with attractive two body forces.
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