Interaction-driven Lifshitz transition with dipolar fermions in optical lattices

E. G. C. P. van Loon; M. I. Katsnelson; L. Chomaz; M. Lemeshko

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Interaction-driven Lifshitz transition with dipolar fermions in optical lattices

机译：相互作用驱动的Lifshitz跃迁与光学晶格中的偶极子费米子

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Anisotropic dipole-dipole interactions between ultracold dipolar fermions break the symmetry of the Fermi surface and thereby deform it. Here we demonstrate that such a Fermi surface deformation induces a topological phase transition-the so-called Lifshitz transition-in the regime accessible to present-day experiments. We describe the impact of the Lifshitz transition on observable quantities such as the Fermi surface topology, the density-density correlation function, and the excitation spectrum of the system. The Lifshitz transition in ultracold atoms can be controlled by tuning the dipole orientation and, in contrast to the transition studied in crystalline solids, is completely interaction driven.

机译：超冷偶极子费米子之间的各向异性偶极子-偶极子相互作用破坏了费米表面的对称性并使之变形。在这里，我们证明了这种费米表面变形会在当前实验可访问的状态下引发拓扑相变（即所谓的Lifshitz过渡）。我们描述了Lifshitz跃迁对可观量（如费米表面拓扑，密度-密度相关函数和系统的激发光谱）的影响。可以通过调节偶极子方向来控制超冷原子中的Lifshitz跃迁，并且与结晶固体中研究的跃迁相反，它是完全由相互作用驱动的。

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《Physical review》 |2016年第19期|195145.1-195145.8|共8页
作者
E. G. C. P. van Loon; M. I. Katsnelson; L. Chomaz; M. Lemeshko;
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Radboud University, Institute for Molecules and Materials, NL-6525 AJ Nijmegen, The Netherlands;

Radboud University, Institute for Molecules and Materials, NL-6525 AJ Nijmegen, The Netherlands;

Institut fuer Experimentalphysik, Universitaet Innsbruck, Technikerstrasse 25, 6020 Innsbruck, Austria,Institut fuer Quantenoptik und Quanteninformation, OEsterreichisches Akademie der Wissenschaften, 6020 Innsbruck, Austria;

IST Austria (Institute of Science and Technology Austria), Am Campus 1, 3400 Klosterneuburg, Austria;

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1. Interaction-driven Lifshitz transition with dipolar fermions in optical lattices [J] . van Loon E. G. C. P., Katsnelson M. I., Chomaz L., Physical review, B . 2016,第19期

机译：相互作用驱动的Lifshitz跃迁与光学晶格中的偶极子费米子
2. Lifshitz transitions and crystallization of fully polarized dipolar fermions in an anisotropic two-dimensional lattice [J] . Sam T. Carr, Jorge Quintanilla, Joseph J. Betouras Physical review . 2010,第4期

机译：各向异性二维晶格中的Lifshitz跃迁和全极化偶极子费米子的结晶
3. Phase diagram of two-component dipolar fermions in one-dimensional optical lattices [J] . De Silva T.N. Physics Letters, A . 2013,第12期

机译：一维光学晶格中两组分偶极费米子的相图
4. DECONFINEMENT AND QUANTUM LIQUID CRYSTALLINESTATES OF DIPOLAR FERMIONS IN OPTICAL LATTICES [C] . SAM T. CARR, JORGE QUINTANILLA, JOSEPH J. BETOURAS International Workshop on Condensed Matter Theories . 2010

机译：光学晶格中偶极度晶体的解构和量子液晶
5. Strongly interacting fermions in optical lattices and superlattices [D] . Goodman, Timothy S. 2009

机译：光学晶格和超晶格中相互作用强的费米子
6. Squeezing out the entropy of fermions in optical lattices [O] . Tin-Lun Ho, Qi Zhou 2009

机译：压缩光学格中费米子的熵
7. Interaction-driven Lifshitz transition with dipolar fermions in optical lattices [O] . Loon E.G.C.P van, Katsnelson M.I., Chomaz L., 2016

机译：相互作用驱动的Lifshitz跃迁与光学晶格中的偶极子费米子
8. Spectroscopy of Dipolar Fermions in Layered Two-Dimensional and Three- Dimensional Lattices [R] . Hazzard, K. R., Gorshkov, A. V., Rey, A. M. 2011

机译：层状二维和三维格子中双极费米子的光谱学

Interaction-driven Lifshitz transition with dipolar fermions in optical lattices

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