Efimov-driven phase transitions of the unitary Bose gas
Efimov-driven phase transitions of the unitary Bose gas
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Efimov 驱动的单一玻色气体的相变
DOI：
10.1038/ncomms4503
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发表时间：
2013
影响因子：
16.6
通讯作者：
W. Krauth
中科院分区：
文献类型：
--
作者：
Swann Piatecki;W. Krauth
最初在核物理学中预测，Efimov三聚体是三个量子粒子的束缚构型，当其中任何一个被移除时，它们就会解体。它们打开了一扇通往丰富量子世界的窗户，这个世界已经成为紧张的实验和理论研究的焦点，因为形成埃菲莫夫三聚体的单一相互作用区域现在可以在冷原子实验中访问。在这里，我们使用有理论论证支持的路径积分蒙特卡罗算法来证明么正玻色子经历了从正常气体到超流体Efimov液体的一级相变，受到与Efimov三聚体相同的影响。一个三相点将这两个相和另一个超流体相--传统的玻色-爱因斯坦凝聚体分开，它与艾菲莫夫液体的共存线在一个临界点结束。我们讨论了在冷原子系统中观察所提出的相变的前景。Efimov三聚体是三个玻色子的束缚态，即使它们的吸引力太弱而不能形成一对态，这三个玻色子也存在。在这里，作者探索了么正玻色气体的相图，并发现了从正常气体到超流体Efimov液体的转变，通过与Efimov三聚体相同的效应保持在一起。
Initially predicted in nuclear physics, Efimov trimers are bound configurations of three quantum particles that fall apart when any one of them is removed. They open a window into a rich quantum world that has become the focus of intense experimental and theoretical research, as the region of ‘unitary’ interactions, where Efimov trimers form, is now accessible in cold-atom experiments. Here we use a path-integral Monte Carlo algorithm backed up by theoretical arguments to show that unitary bosons undergo a first-order phase transition from a normal gas to a superfluid Efimov liquid, bound by the same effects as Efimov trimers. A triple point separates these two phases and another superfluid phase, the conventional Bose–Einstein condensate, whose coexistence line with the Efimov liquid ends in a critical point. We discuss the prospects of observing the proposed phase transitions in cold-atom systems. Efimov trimers are bound states of three bosons, which exist even if their attraction is too weak to form a pair state. Here, the authors explore the phase diagram of a unitary Bose gas and find a transition from a normal gas to a superfluid Efimov liquid, held together by the same effects as Efimov trimers.
影响因子：
8.6
作者：
Fletcher, Richard J.;Gaunt, Alexander L.;Hadzibabic, Zoran
通讯作者：
Hadzibabic, Zoran