We provide a general discussion on the importance of three-body Efimovphysics for strongly interacting ultracold quantum gases. Using the adiabatichyperspherical representation, we discuss a universal classification ofthree-body systems in terms of the attractive or repulsive character of theeffective interactions. The hyperspherical representation leads to a simple andconceptually clear picture for the bound and scattering properties ofthree-body systems with strong $s$-wave interactions. Using our universalclassification scheme, we present a detailed discussion of all relevantultracold three-body scattering processes using a pathway analysis that makesevident the importance of Efimov physics in determining the energy andscattering length dependence of such processes. This article provides a generaloverview of the current status of the field and a discussion of various issuesrelevant to the lifetime and stability of ultracold quantum gases along withuniversal properties of ultracold, resonantly interacting, few-body systems.
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机译：我们对三体Efimovphysics对强相互作用的超冷量子气体的重要性进行了一般性讨论。使用绝热球面表示，我们根据有效相互作用的吸引或排斥特性，讨论了三体系统的通用分类。超球面表示法为具有强$ s $波相互作用的三体系统的束缚和散射特性提供了一个简单且概念上清晰的画面。使用我们的通用分类方案，我们使用路径分析对所有相关的超三体散射过程进行了详细讨论，这清楚地表明了Efimov物理学在确定此类过程的能量和散射长度依赖性方面的重要性。本文概述了该领域的现状，并讨论了与超冷量子气体的寿命和稳定性以及超冷，共振相互作用，少体系统的普遍性质相关的各种问题。
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