Experimental investigation in quantum degenerate Fermi-Bose gas mixtures

该项目将侧重于费米系统和费米玻色混合物在弱相互作用气体的物理学的核心方面。总的目标是深刻理解超冷费米和费米玻色气体的相互作用机制。与玻色系统相比，费米统计导致了根本不同的物理学。在这些系统中预测的丰富多样的现象中，我们将专注于纯和混合系统中的相关性和相变的研究。特别是，计划在40K和87Rb量子气体中进行费米系统基本激发的实验，它们在混合系统中的变化和相关的加热过程，以及光学晶格中费米系统相关函数的干涉检测。作为一个基本的目标，在光学晶格中的简并40K量子气体的BCS跃迁的可能性进行了探索。

This project will focus on central aspects of the physics of Fermi systems and Fermi-Bose mixtures in weakly interacting gases. The general goal is a profound understanding of the interaction mechanisms in ultracold Fermi and Fermi-Bose gases. As compared to Bose systems, Fermi statistics leads to fundamentally different physics. Among the rich variety of phenomena predicted in these systems, we will focus on the study of correlations and phase transitions in pure and mixed systems. In particular, experimentes in 40K and 87Rb quantum gases on fundamental excitations in Fermi systems, their variation within a mixed system and related heating processes as well as interferometric detection of correlation functions of Fermi systems in optical lattices are planned. As a fundamental goal, the possibilities for a BCS transition of a degenerate 40K quantum gas in an optical lattice shall be explored.