Trapped Fermi Gases as Models of Strongly Interacting Matter

俘获费米气体作为强相互作用物质的模型

• 批准号: 0455590
• 负责人: John Thomas
• 金额: $ 42.4万
• 依托单位: Duke University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-05-01 至 2008-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0455590&HistoricalAwards=false
• 关键词: Trapped; Fermi; Gases; Models; Strongly

This experimental research program is aimed at using an optically trapped, ultra cold, strongly interacting Fermi gas of atoms as a model for the exotic, strongly interacting Fermi systems comprising nuclear matter. The experiments will employ all-optical methods. An ultra stable carbon dixide laser trap will be loaded with a mixture of spin-up and spin-down Fermionic Li-6 atoms to directly produce highly degenerate, strongly interacting mixtures by forced evaporation near a Feshbach resonance. The goals of this program include three topics which are relevant to nuclear matter: i) The study of hydrodynamic expansion of the gas in the non-superfluid regime versus the super-fluid regime, including anisotropy, shear and viscosity, and surface tension; ii) Precision measurement of universal interactions; iii) Measurements of density modulation in Fermi gases with unequal spin mixtures. The broader impact of the program involves student education as well as applications to materials science and condensed matter physics, nuclear physics, high-energy physics, and astrophysics.

这个实验研究计划的目的是使用光学捕获的、超冷的、强相互作用的费米原子气体作为包含核物质的奇异的、强相互作用的费米系统的模型。这些实验将采用全光学方法。一个超稳定的二氧化碳激光陷阱将装载自旋向上和自旋向下的费米子Li-6原子的混合物，通过在Feshbach共振附近的强迫蒸发直接产生高度简并的、强相互作用的混合物。该计划的目标包括与核物质有关的三个主题：i)研究气体在非超流状态下与超流体状态下的流体动力学膨胀，包括各向异性、剪切和粘度以及表面张力；ii)精确测量宇宙相互作用；iii)测量具有不等自旋混合物的费米气体中的密度调制。该计划的更广泛影响涉及学生教育以及材料科学和凝聚态物理、核物理、高能物理和天体物理的应用。