Fermionic quantum matter in atomic gases and solid state systems

原子气体和固态系统中的费米子量子物质

• 批准号: 281995773
• 负责人: Dr. Igor Boettcher
• 金额: --
• 依托单位: Department of Physics
• 依托单位国家: 德国
• 项目类别: Research Fellowships
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/281995773?language=en
• 关键词: Fermionic; quantum; matter; atomic; gases

This project aims at investigating the influence of fermionic degrees of freedom on the macroscopic properties of many-body systems. Although the expected effects typically occur at very low temperatures, it is of central importance for technological applications to understand the underlying mechanisms. Fermionic quantum matter is realized in a variety of physical systems. In this project we explore models for ultracold Fermi gases, high-temperature superconductors, and graphene by means of quantum field theoretical methods like the Renormalization Group. For one, properties of the so-called Sarma phase shall be identified together with parameter regimes for its realization in ultracold Fermi gases and solid state systems. The most remarkable fact about this state of matter is that it shares properties of both metallic and superconducting character. Furthermore, the competition of distinct ordering principles in fermionic systems shall be studied. This has implications on the phase diagrams of cuprate superconductors and graphene.

本项目旨在研究费米子自由度对多体系统宏观性质的影响。虽然预期的效果通常发生在非常低的温度下，但了解潜在的机制对于技术应用至关重要。费米子量子物质可以在多种物理系统中实现。在这个项目中，我们通过像重整化组这样的量子场理论方法来探索超冷费米气体、高温超导体和石墨烯的模型。首先，要在超冷费米气体和固态系统中实现所谓的Sarma相的特性，必须与参数体系一起确定。这种物质状态最显著的特点是它同时具有金属和超导的特性。此外，还研究了费米子系统中不同排序原理的竞争。这对铜超导体和石墨烯的相图具有启示意义。

项目成果

High-temperature pairing in a strongly interacting two-dimensional Fermi gas

• DOI: 10.1126/science.aan5950
• 发表时间: 2017-05
• 期刊: Science
• 影响因子: 56.9
• 作者: P. A. Murthy;M. Neidig;Ralf Klemt;L. Bayha;I. Boettcher;T. Enss;Marvin Holten;G. Zürn;P. Preiss;S. Jochim

Anisotropy induces non-Fermi-liquid behavior and nematic magnetic order in three-dimensional Luttinger semimetals

• DOI: 10.1103/physrevb.95.075149
• 发表时间: 2017-02-27
• 期刊: PHYSICAL REVIEW B
• 影响因子: 3.7
• 作者: Boettcher, Igor;Herbut, Igor F.
• 通讯作者: Herbut, Igor F.

Unconventional Superconductivity in Luttinger Semimetals: Theory of Complex Tensor Order and the Emergence of the Uniaxial Nematic State.

• DOI: 10.1103/physrevlett.120.057002
• 发表时间: 2017-07
• 期刊: Physical review letters
• 影响因子: 8.6
• 作者: I. Boettcher;I. Herbut

Quasi-long-range order in trapped two-dimensional Bose gases

二维玻色气体中的准长程有序

• DOI: 10.1103/physreva.94.011602
• 发表时间: 2016
• 期刊: Physical Review A
• 影响因子: 2.9
• 作者: I Boettcher;M Holzmann
• 通讯作者: M Holzmann