Spin Transport in Polarized Fermi Liquids

坎德拉教授将测量费米液体3He和3He- 4he混合物中的自旋输运和磁化，当3He自旋的很大一部分沿着某个方向极化时。由于3He原子遵循量子统计，极化有望对液体的许多性质产生深远的影响，包括自旋输运。脉冲核磁共振（NMR）光谱将用于在10特斯拉的大磁场和低于10毫开尔文的低温下探测液体样品。将有界介质中非线性波的理论与结果进行比较。有人预测，在实验条件下，在这些液体中应该可以探测到非线性自旋波，包括孤子和更复杂的准周期模式。利用脉冲核磁共振技术研究高极化3He液体中的自旋输运。

Professor Candela will measure the transport of spin and magnetization in the Fermi liquids 3He and 3He-4He mixtures when a significant fraction of the 3He spins have been polarized along some direction. Due to quantum statistics obeyed by 3He atoms, the polarization is expected to have a profound effect upon many properties of the liquids, including the spin transport. Pulsed nuclear magnetic resonance (NMR) spectroscopy will be used to probe liquid samples in a large magnetic field of 10 Tesla and at low temperatures, less than 10 milliKelvin. Theories of non-linear waves in bounded media will be compared with the results. There are predictions that non-linear spin waves including solitons and more complicated quasiperiodic modes, should be detectable in these liquids under the experimental conditions to be used. Spin transport in highly polarized 3He liquid will be studied with the pulsed NMR technique.