Universal Behavior of Few-Boson Systems Using Potential Models

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• 作者：A. Kievsky ; M. Viviani ; R. Álvarez-Rodríguez ; M. Gattobigio ; A. Deltuva
• 刊名：Few-Body Systems
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：58
• 期：2
• 全文大小：
• 刊物类别：Physics and Astronomy
• 刊物主题：Particle and Nuclear Physics; Nuclear Physics, Heavy Ions, Hadrons; Atomic, Molecular, Optical and Plasma Physics;
• 出版者：Springer Vienna
• ISSN：1432-5411
• 卷排序：58

文摘

The universal behavior of a three-boson system close to the unitary limit is encoded in a simple dependence of many observables in terms of few parameters. For example the product of the three-body parameter \(\kappa _*\) and the two-body scattering length a, \(\kappa _* a\) depends on the angle \(\xi \) defined by \(E_3/E_2=\tan ^2\xi \). A similar dependence is observed in the ratio \(a_{AD}/a\) with \(a_{AD}\) the boson-dimer scattering length. We use a two-parameter potential to determine this simple behavior and, as an application, to compute \(a_{AD}\) for the case of three \(^4\)He atoms.