School of Chemistry, Tel Aviv University, 69978 Tel Aviv, Israel.
Phys Rev Lett. 2011 Jul 8;107(2):024301. doi: 10.1103/PhysRevLett.107.024301. Epub 2011 Jul 6.
Even the most regular stick-slip frictional sliding is always stochastic, with irregularity in both the intervals between slip events and the sizes of the associated stress drops. Applying small-amplitude oscillations to the shear force, we show, experimentally and theoretically, that the stick-slip periods synchronize. We further show that this phase locking is related to the inhibition of slow rupture modes which forces a transition to fast rupture, providing a possible mechanism for observed remote triggering of earthquakes. Such manipulation of collective modes may be generally relevant to extended nonlinear systems driven near to criticality.
即使是最规则的粘滑摩擦滑动也总是随机的，在滑动事件之间的间隔和相关的应力降的大小上都存在不规则性。通过对剪切力施加小振幅的振荡，我们通过实验和理论证明，粘滑周期会同步。我们进一步表明，这种相位锁定与抑制慢破裂模式有关，这迫使向快速破裂转变，为观察到的地震远程触发提供了一种可能的机制。这种对集体模式的操纵可能与在接近临界点驱动的扩展非线性系统普遍相关。
