On the modification of the Efimov spectrum in a finite cubic box

Details On the modification of the Efimov spectrum in a finite cubic box On the modification of the Efimov spectrum in a finite cubic box

2009-10-12

arxiv.org/abs/0910.2191v2

Eur.Phys.J.A43:229-240,2010

Physics

Nuclear Physics

Nuclear Theory

21 pages, 8 figures, published version

Scientific paper

10.1140/epja/i2010-10910-6

Three particles with large scattering length display a universal spectrum of three-body bound states called "Efimov trimers''. We calculate the modification of the Efimov trimers of three identical bosons in a finite cubic box and compute the dependence of their energies on the box size using effective field theory. Previous calculations for positive scattering length that were perturbative in the finite volume energy shift are extended to arbitrarily large shifts and negative scattering lengths. The renormalization of the effective field theory in the finite volume is explicitly verified. Moreover, we investigate the effects of partial wave mixing and study the behavior of shallow trimers near the dimer energy. Finally, we provide numerical evidence for universal scaling of the finite volume corrections.

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