Spin-polarized−43He solutions: Longitudinal spin diffusion and nonlinear spin dynamics

Stable Spin Precession at One Half of Equilibrium Magnetization in Superfluid3He-B

“…This means that before the pulse the magnetization is roughly along H and S ഠ 1 2 S eq . For all HM modes the FID duration is nearly the same as in normal 3 He. This implies that, when H rf 0, they all reduce to the same HM state which preserves its configuration during the FID.…”

“…These dynamic order parameter states are the first examples of stable precession with a magnetization different from the equilibrium value M eq . The p A number of stable states of coherent spin precession have been observed and identified in NMR experiments in the normal and B phases of liquid 3 He and in 3 He- 4 He solutions [1][2][3][4]. Some of these states in 3 He-B display the same features of spontaneously broken symmetry that characterize quantum coherence in superfluids.…”

“…1). On comparing its amplitude with that of the FID obtained after a single 90 ± tipping pulse in normal 3 He we find that for all HM modes the amplitude ratio is 0.50 6 0.03 and not dependent on the phase of the rf pulse. This means that before the pulse the magnetization is roughly along H and S ഠ 1 2 S eq .…”

“…V. Dmitriev New modes of spin precession have been observed in superfluid 3 He-B with a precessing magnetization M pM eq , where p 1, 1 2 , and ഠ0. These dynamic order parameter states are the first examples of stable precession with a magnetization different from the equilibrium value M eq .…”

Nonwetting Conditions for Coherent Quantum Precession in SuperfluidHe3−B

“…At the wall (x = 0) the boundary condition for the stationary n vector of SD is determined by the surface energy (6). The condition on the boundary between the HPD and SD textures (solid line in Fig.…”