Quantum Limitation to the Coherent Emission of Accelerated Charges

被引:26
作者
Angioi, A. [1 ]
Di Piazza, A. [1 ]
机构
[1] Max Planck Inst Kernphys, Saupfercheckweg 1, D-69117 Heidelberg, Germany
关键词
ELECTROMAGNETIC-WAVE; ELECTRON; LASER; MICROSCOPY; FIELD;
D O I
10.1103/PhysRevLett.121.010402
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Accelerated charges emit electromagnetic radiation. According to classical electrodynamics, if the charges move along sufficiently close trajectories they emit coherently; i.e., their emitted energy scales quadratically with their number rather than linearly. By investigating the emission by a two-electron wave packet in the presence of an electromagnetic plane wave within strong-field QED, we show that quantum effects deteriorate the coherence predicted by classical electrodynamics even if the typical quantum nonlinearity parameter of the system is much smaller than unity. We explain this result by observing that coherence effects are also controlled by a new quantum parameter which relates the recoil undergone by the electron to the width of its wave packet in momentum space.
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页数:6
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