Higher fidelity simulations of nonlinear Breit–Wheeler pair creation in intense laser pulses

Higher fidelity simulations of nonlinear Breit–Wheeler pair creation in intense laser pulses
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强激光脉冲中非线性 Breit-Wheeler 对生成的更高保真度模拟

DOI:
10.1140/epjc/s10052-021-09955-3
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发表时间:
2021
期刊:
The European Physical Journal C
影响因子:
--
通讯作者:
B. King
B. King
中科院分区:
--
文献类型:
--
作者:
T. Blackburn;B. King

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当光子与激光脉冲碰撞时,可以通过非线性布赖特-惠勒过程产生电子-正电子对。我们开发了一个模拟框架来计算这一过程,该框架基于有质动力方法,其中包括通过局部单色近似 (LMA) 产生的强场量子电动力学效应。在这里,我们将不同物理条件下各种可观测值的模拟预测与理论精确分析结果的数值评估进行比较。对于聚焦激光背景的情况,我们还将模拟与高能理论近似进行了比较。这些比较用于量化模拟方法计算谐波结构的准确性,谐波结构出现在出射粒子的光前动量和角谱中,以及从多光子到全阶对创建的转变中。计算一系列强度参数上的对的总产量也用于评估局部恒定场近似 (LCFA) 的准确性。
When a photon collides with a laser pulse, an electron-positron pair can be produced via the nonlinear Breit–Wheeler process. A simulation framework has been developed to calculate this process, which is based on a ponderomotive approach that includes strong-field quantum electrodynamical effects via the locally monochromatic approximation (LMA). Here we compare simulation predictions for a variety of observables, in different physical regimes, with numerical evaluation of exact analytical results from theory. For the case of a focussed laser background, we also compare simulation with a high-energy theory approximation. These comparisons are used to quantify the accuracy of the simulation approach in calculating harmonic structure, which appears in the lightfront momentum and angular spectra of outgoing particles, and the transition from multi-photon to all-order pair creation. Calculation of the total yield of pairs over a range of intensity parameters is also used to assess the accuracy of the locally constant field approximation (LCFA).
DOI: 10.1088/1367-2630/ab1e0d
发表时间: 2018-07
影响因子: 3.3
作者:
T. Blackburn;A. Ilderton;M. Marklund;Christopher Ridgers
通讯作者: T. Blackburn;A. Ilderton;M. Marklund;Christopher Ridgers
通过强场中的非线性康普顿散射生产 ALP
DOI: --
发表时间: 2018
期刊: ArXiv e-prints
影响因子: --
作者:
Dillon Barry M.
通讯作者: Dillon Barry M.
DOI: 10.1016/j.jcp.2013.12.007
发表时间: 2014-03-01
影响因子: 4.1
作者:
Ridgers, C. P.;Kirk, J. G.;Bell, A. R.
通讯作者: Bell, A. R.