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arXiv 2303.01946hep-phquant-ph
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强磁场中标量带电粒子发射扭曲光子

Emission of twisted photons by a scalar charged particle in a strong magnetic field

D. Karlovets, A. Di Piazza

AI总结:

研究强磁场中标量带电粒子仅探测电荷时发射的光子性质,发现发射光子为扭曲Bessel光束,其总角动量由初末态粒子角动量量子数之差决定,且多数光子在硬X射线和γ射线范围内呈现扭曲特性。

摘要:

我们研究了在恒定且均匀的磁场中标量带电粒子发射光子的过程。与假设光子和出射电荷均被探测到的传统方法不同,我们研究了仅探测电荷的情况,并研究了发射光子的性质。在计算中精确考虑了背景磁场,并用相对论 Landau 态描述电荷。结果表明,发射的光子态代表一个扭曲的 Bessel 光束,其总角动量为 $\ell-\ell'$,其中 $\ell$ 和 $\ell'$ 分别是初始和最终带电粒子的角动量量子数。由未极化电荷发射的大多数光子,特别是在硬 X 射线和 $γ$ 射线范围以及临界和亚临界磁场中,相对于 Schwinger 值 $H_c = 4.4\times 10^9$ T,结果证明是扭曲的,且 $\ell-\ell'\gtrsim 1$。

英文摘要:

We consider the emission of a photon by a scalar charged particle in a constant and uniform magnetic field. In contrast to the conventional approach with both photon and outgoing charge being assumed to be detected, we study the case where only the charge is detected and investigate the properties of the emitted photon. The background magnetic field is taken into account exactly in the calculations and the charge is described by relativistic Landau states. It is shown that the emitted photon state represents a twisted Bessel beam with a total angular momentum given by $\ell-\ell'$, where $\ell$ and $\ell'$ are angular momentum quantum numbers of the initial and final charged particle, respectively. The majority of photons emitted by unpolarized charges, especially in the hard X-ray and $γ$-ray range and in critical and sub-critical magnetic fields, as compared to the Schwinger value of $H_c = 4.4\times 10^9$ T, turn out to be twisted with $\ell-\ell'\gtrsim 1$.

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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