N-body Efimov states of trapped bosons

Details N-body Efimov states of trapped bosons N-body Efimov states of trapped bosons

2008-06-24

arxiv.org/abs/0806.3839v1

Europhys. Lett., 83 (2008) 30012

Physics

Atomic Physics

Scientific paper

10.1209/0295-5075/83/30012

We demonstrate the possibility of existence of meta-stable N-body Efimov states in trapped Bose systems with large scattering length. We calculate spectra of trapped systems of N=3,4,5,6, and 7 bosons using a stochastic variational method with a restricted correlated Gaussian basis. For each system the calculations reveal a series of Efimov states where the energy and the r.m.s. radius exhibit the characteristic exponential dependence upon the state number. We also estimate the contribution of these states to the recombination rate of Bose-Einstein condensates.

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