Investigation on quantum state of one-dimensional helium-3 fluid formed in nanochannels

为了研究被4He膜包裹的稀3He吸附在直纳米通道中的低温量子态，设置了脉冲核磁共振测量系统，测量了稀3He的磁化率和核弛豫。得到的结果，如费米温度和态密度的密度依赖性，强烈表明，非常稀的3He小于0.7%覆盖率在低温下进入简并态，作为真正的一维流体，仅沿着通道轴具有一定的运动自由度。通过对纳米通道中纯3He薄膜的核弛豫测量，获得了薄膜中原子运动的微观信息，包括迄今为止尚未认识到的层间粒子的快速交换。

To examine the low-temperature quantum state of dilute 3He adsorbed in straight nanochannels coated with 4He film, a pulsed NMR measuring system was arranged, and the susceptibility and nuclear relaxation were measured on the dilute 3He. Obtained results such as density dependence of the Fermi temperature and density of states strongly suggest that very dilute 3He less than 0.7% coverage falls into the degenerate state at low temperatures, as a genuine one-dimensional fluid with a degree of motional freedom only along the channel axis. From nuclear relaxation measurements on pure 3He film in the nanochannels, microscopic information on atomic motion in the film, including rapid interlayer particle exchange which has not been recognized so far, was newly obtained.