Mesoscopic fluctuations of electron-spin polarization in disordered conductors.

We show that, in a disordered mesoscopic conductor, the memory of electron-spin polarization is preserved even after multiple-spin-orbit-scattering processes. We propose to use the technique of detection of nonequilibrium spin polarization by ferromagnetic point contacts to test our prediction experimentally. We argue that the long-range memory effects of spin polarization can also be observed in the local electron density, which is amenable to a measurement by point voltage contacts. We develop a Langevin scheme for nonlocal correlations of spin polarization