Quantum Properties of Systems at Ultralow Temperatures

超低温系统的量子特性

• 批准号: 9200671
• 负责人: Mark Meisel
• 金额: --
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-04-01 至 1996-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9200671&HistoricalAwards=false
• 关键词: Quantum; Properties; Systems; Ultralow; Temperatures

Superfluid helium-3 has been identified as a p-wave pairing system, possessing an isotropic energy gap reminiscent of a superconductor. The theoretical picture remains clouded, however. It is proposed to measure the pair-breaking energy, using ultrasound at a temperature well below the phase transition, and from that obtain a value for the energy gap. The entire pressure range from saturation vapor pressure to melting pressure will be investigated. Other experiments are planned on heavy-fermion systems and one- dimensional Heisenberg antiferromagnets. This research aims to clarify some of the puzzles surrounding the quantum-mechanical properties of bulk matter at temperatures close to absolute zero.

超流氦 3 已被确定为 p 波配对系统，具有类似于超导体的各向同性能隙。 然而，理论前景仍然不明朗。 建议在远低于相变的温度下使用超声波来测量断对能量，并从中获得能隙的值。 将研究从饱和蒸气压到熔化压力的整个压力范围。 其他实验计划在重费米子系统和一维海森堡反铁磁体上进行。 这项研究旨在澄清围绕接近绝对零温度下大块物质的量子力学特性的一些难题。