The coupling of spin angular momentum and mechanical rotation is utilized for generating a spin current of nuclear spins of the liquid helium-3. A hydrodynamic flow in the liquid helium-3 provides a vorticity gradient which can be regarded as a gradient of effective magnetic field by the spin-rotation coupling. The effective field gradient generates a nuclear spin current owing to the Stern–Gerlach effect. We quantitatively estimate the magnitude of the field gradient based on the microscopic Boltzmann equation. The effective field gradient is large enough to be detected by NMR measurements.

中文翻译：

---

液态氦3的流动产生有效场梯度和自旋电流

利用自旋角动量和机械旋转的耦合来产生液态氦3的核自旋的自旋电流。液态氦3中的流体动力流提供了涡度梯度，通过自旋旋转耦合可以将其视为有效磁场的梯度。由于斯特恩-格拉拉赫效应，有效场梯度会产生核自旋电流。我们基于微观的玻耳兹曼方程定量估计场梯度的大小。有效场梯度足够大，可以通过NMR测量来检测。