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arXiv quant-ph/0008084quant-ph
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台阶势垒的精确相对论时间演化

Exact relativistic time evolution for a step potential barrier

Jorge Villavicencio

摘要:

为了研究经典禁带中的波的演化,我们导出了阶跃势垒下Klein-Gordon方程在截断平面波初始条件下的精确解析解.我们发现,相对论性的解决方案迅速消失的深度$2x_p$内的潜力,其中$x_p$是固定的解决方案的渗透长度。在特征距离$2x_p$之外,索末菲型前体以光速$c$沿电势行进。然而,没有观察到主波前沿着结构的空间传播。我们还发现了一个非因果的波前峰的时间演化。这种效应只是明显违反了爱因斯坦的因果关系。

英文摘要:

We derive an exact analytic solution to a Klein-Gordon equation for a step potential barrier with cutoff plane wave initial conditions, in order to explore wave evolution in a classical forbidden region. We find that the relativistic solution rapidly evanesces within a depth $2x_p$ inside the potential, where $x_p$ is the penetration length of the stationary solution. Beyond the characteristic distance $2x_p$, a Sommerfeld-type precursor travels along the potential at the speed of light, $c$. However, no spatial propagation of a main wavefront along the structure is observed. We also find a non-causal time evolution of the wavefront peak. The effect is only an apparent violation of Einstein causality.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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