We point out an enhancement of the pair production rate of charged fermions in a strong electric field in the presence of time dependent classical axion-like background field, which we call axion assisted Schwinger effect. While the standard Schwinger production rate is proportional to \( \exp \left(-\pi \left({m}^2+{p}_T^2\right)/E\right) \), with m and p_T denoting the fermion mass and its momentum transverse to the electric field E, the axion assisted Schwinger effect can be enhanced at large momenta to exp(−πm²/E). The origin of this enhancement is a coupling between the fermion spin and its momentum, induced by the axion velocity. As a non-trivial validation of our result, we show its invariance under field redefinitions associated with a chiral rotation and successfully reproduce the chiral anomaly equation in the presence of helical electric and magnetic fields. We comment on implications of this result for axion cosmology, focussing on axion inflation and axion dark matter detection.

我们指出了在存在时间依赖性的经典轴对称背景场的情况下，在强电场中带电费米子的成对生产率的提高，我们将其称为轴辅助施维格效应。标准的Schwinger生产率与\（\ exp \ left（-\ pi \ left（{m} ^ 2 + {p} _T ^ 2 \ right）/ E \ right）\）成正比，其中m和p _T表示费米子的质量和其动量横向于电场ë，辅助薛定谔效果轴子可在大动量被增强以EXP（-πm ² / E）。这种增强的起因是费米子自旋与其动量之间的耦合，后者是由轴速引起的。作为对我们结果的非平凡验证，我们显示了在与手性旋转相关的场重新定义下其不变性，并在存在螺旋电场和磁场的情况下成功地重现了手性异常方程。我们评论此结果对斧头宇宙学的影响，重点放在斧头膨胀和斧头暗物质检测上。