arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0907.4638quant-ph
收藏

N-Slit干涉:近场分形,Bohmian轨迹

N-Slit Interference: Fractals in Near-Field Region, Bohmian Trajectories

Valeriy I. Sbitnev

摘要:

散射冷粒子上的$N$狭缝光栅再现干涉图案,表现在近场区域的分形塔尔博特地毯。在远场区,图案被转换为普通衍射,其中主光束被($N-2$)弱光束彼此分隔。计算了近场和远场的波函数的概率密度图,用高斯波包表示。Bohmian(测地线)轨迹,由一个指导方程计算,叠加在概率密度图足够好。这意味着,一个粒子,从一个源到一个检测器,通过光栅沿着一个单一的玻姆轨迹通过,通过一个,只有一个狭缝。保留字:高斯波包,中子散射,制导方程,玻姆轨迹,近场干涉,远场衍射,泰伯地毯,分形

英文摘要:

Scattering cold particles on an $N$-slit grating is shown to reproduce an interference pattern, that manifests itself in the near-field region as the fractal Talbot carpet. In the far-field region the pattern is transformed to an ordinary diffraction, where principal beams are partitioned from each other by ($N-2$) weak ones. A probability density plot of the wave function, to be represented by a gaussian wavepacket, is calculated both in the near-field region and in the far-field one. Bohmian (geodesic) trajectories, to be calculated by a guidance equation, are superimposed on the probability density plot well enough. It means, that a particle, moving from a source to a detector, passes across the grating along a single bohmian trajectory through-passing one and only one slit. Keywords: Gaussian wavepacket, neutron scattering, guidance equation, bohmian trajectory, near-field interference, far-field diffraction, Talbot carpet, fractal

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。

↑