Weak three-dimensional mediators of two-dimensional triplet pairing
Weak three-dimensional mediators of two-dimensional triplet pairing
复制标题
二维三联体配对的弱三维介体
DOI：
10.1103/physrevb.97.024503
复制
发表时间：
2017
影响因子：
3.7
通讯作者：
S. Tsai
中科院分区：
文献类型：
--
作者：
S. Kelly;S. Tsai
作者：Kelly， Shane；摘要：最近的实验证明了构建具有种选择性光学晶格的冷原子混合物的能力。这允许了混合维系统的可能性，其中一个费米子原子物种被限制在二维晶格中，而另一个物种被限制在包含二维晶格的三维晶格中。我们表明，通过调整任意数量的三维原子种类的密度，我们可以设计出任意的、旋转对称的、密度-密度的、有效的二维粒子相互作用。这种可能性允许有效的相互作用，有利于二维，$SU(2)$对称粒子的三重态配对。利用二维粒子的泛函重正化群分析，我们推导并数值证实了三重态配对的临界温度与有效相互作用强度呈指数关系。然后，我们分析了粒子密度和相互作用参数的微调如何影响该相的稳定性。最后，我们简要地讨论了实验考虑和研究三重态对物理的潜力，包括马约拉纳费米子和自旋织构，在光学晶格上的冷原子。
Author(s): Kelly, Shane; Tsai, S-W | Abstract: Recent experiments demonstrate the ability to construct cold atom mixtures with species selective optical lattices. This allows for the possibility of a mixed-dimension system, where one fermionic atomic species is confined to a two dimensional lattice, while another species is confined to a three dimensional lattice that contains the two-dimensional one. We show that by tuning the density of an arbitrary number of three-dimensional atomic species, we can engineer an arbitrary, rotationally-symmetric, density-density, effective interaction for the two-dimensional particles. This possibility allows for an effective interaction that favours triplet pairing for two-dimensional, $SU(2)$ symmetric particles. Using a functional renormalization-group analysis for the two-dimensional particles, we derive and numerically confirm that the critical temperature for triplet pairing depends exponentially on the effective interaction strength. We then analyse how the stability of this phase is affected by the particle densities and the fine tuning of interaction parameters. We conclude by briefly discussing experimental considerations and the potential to study triplet pairing physics, including Majorana fermions and spin textures, with cold atoms on optical lattices.
影响因子：
19.6
作者：
Soltan-Panahi, Parvis;Luehmann, Dirk-Soeren;Sengstock, Klaus
通讯作者：
Sengstock, Klaus