在二维超导金属面上，用被超导屏蔽的距离为d 的两无限长直磁通垂直穿过，开始dΦ/dt≠0，并在二维超导金属面上感应两个反向等值电流，然后使dΦ/dt= 0 且两磁通皆维持Φ₀不变.本文计算并模拟了二维超导金属面上感应电流的干涉分布流线.我们称这一效应为L-J 效应，它是A 场中的超导感应电流干涉效应.

When a two-dimensional superconducting mental surface is passed through by two infinite straight magnetic flux，it is shielded by superconductivity.It is supposed that the change rate of flux is not equal to zero at the beginning，which induces two opposite and equal currents on the two - dimensional superconducting mental surface.In this situation，when the change rate of flux is changed to zero and both magnetic fluxes remain constant，a new physical interference effect appears. In this paper， the interference streamline distribution on the two-dimensional superconducting mental surface is calculated and simulated. We named the new interference phenomenon L-J effect considered as a two-dimensional A-B effect.