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Squeezed momentum distributions of relativistic electrons in intense laser fields with arbitrary polarization

We investigate the dynamics of relativistic electrons interacting with intense laser fields in a linear or circular polarization. First, we study the momentum distributions of a single spatially localized wave packet. We find that these distributions are squeezed in the polarization plane (y-z) as w...

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主要な著者: Ooi, Chong Heng Raymond, Chelkowski, Szczepan, Bandrauk, Andre D.
フォーマット: 論文
出版事項: American Physical Society 2020
主題:
Q Science (General)
QC Physics
オンライン･アクセス:http://eprints.um.edu.my/25449/
https://doi.org/10.1103/PhysRevA.101.013401
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spelling my.um.eprints.254492020-08-25T06:38:57Z http://eprints.um.edu.my/25449/ Squeezed momentum distributions of relativistic electrons in intense laser fields with arbitrary polarization Ooi, Chong Heng Raymond Chelkowski, Szczepan Bandrauk, Andre D. Q Science (General) QC Physics We investigate the dynamics of relativistic electrons interacting with intense laser fields in a linear or circular polarization. First, we study the momentum distributions of a single spatially localized wave packet. We find that these distributions are squeezed in the polarization plane (y-z) as well as along the laser propagation (x) direction. In a chosen gauge, the squeezing direction is controlled by the laser vector potential A and the electron initial momentum. For the case when the electron initial momentum is zero the squeezing occurs directly along the direction of A. We obtain analytical expressions within linear momentum approximation that explain the squeezing features very well by defining a squeezing vector and rotational angle of the squeezed momentum distribution. We analyze the symmetric properties of the momentum distributions viewed in different momentum planes and discuss the effects of different helicity of circular laser polarizations and the direction of the spin quantization. An unexpected feature of bending of momentum distribution is found for very intense laser fields. We extend our investigation to the momentum distribution of two spatially separated wave packets, particularly the orientations of two crossing distributions. It is found that the absolute phase of the initial laser field affects the orientation of the electron momentum distributions while quantum superposition of two states with the same spin gives interference in the momentum distributions that depends on the quantum phase of the electron. © 2020 American Physical Society. American Physical Society 2020 Article PeerReviewed Ooi, Chong Heng Raymond and Chelkowski, Szczepan and Bandrauk, Andre D. (2020) Squeezed momentum distributions of relativistic electrons in intense laser fields with arbitrary polarization. Physical Review A, 101 (1). 013401. ISSN 2469-9926 https://doi.org/10.1103/PhysRevA.101.013401 doi:10.1103/PhysRevA.101.013401
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic Q Science (General)
QC Physics
spellingShingle Q Science (General)
QC Physics
Ooi, Chong Heng Raymond
Chelkowski, Szczepan
Bandrauk, Andre D.
Squeezed momentum distributions of relativistic electrons in intense laser fields with arbitrary polarization
description We investigate the dynamics of relativistic electrons interacting with intense laser fields in a linear or circular polarization. First, we study the momentum distributions of a single spatially localized wave packet. We find that these distributions are squeezed in the polarization plane (y-z) as well as along the laser propagation (x) direction. In a chosen gauge, the squeezing direction is controlled by the laser vector potential A and the electron initial momentum. For the case when the electron initial momentum is zero the squeezing occurs directly along the direction of A. We obtain analytical expressions within linear momentum approximation that explain the squeezing features very well by defining a squeezing vector and rotational angle of the squeezed momentum distribution. We analyze the symmetric properties of the momentum distributions viewed in different momentum planes and discuss the effects of different helicity of circular laser polarizations and the direction of the spin quantization. An unexpected feature of bending of momentum distribution is found for very intense laser fields. We extend our investigation to the momentum distribution of two spatially separated wave packets, particularly the orientations of two crossing distributions. It is found that the absolute phase of the initial laser field affects the orientation of the electron momentum distributions while quantum superposition of two states with the same spin gives interference in the momentum distributions that depends on the quantum phase of the electron. © 2020 American Physical Society.
format Article
author Ooi, Chong Heng Raymond
Chelkowski, Szczepan
Bandrauk, Andre D.
author_facet Ooi, Chong Heng Raymond
Chelkowski, Szczepan
Bandrauk, Andre D.
author_sort Ooi, Chong Heng Raymond
title Squeezed momentum distributions of relativistic electrons in intense laser fields with arbitrary polarization
title_short Squeezed momentum distributions of relativistic electrons in intense laser fields with arbitrary polarization
title_full Squeezed momentum distributions of relativistic electrons in intense laser fields with arbitrary polarization
title_fullStr Squeezed momentum distributions of relativistic electrons in intense laser fields with arbitrary polarization
title_full_unstemmed Squeezed momentum distributions of relativistic electrons in intense laser fields with arbitrary polarization
title_sort squeezed momentum distributions of relativistic electrons in intense laser fields with arbitrary polarization
publisher American Physical Society
publishDate 2020
url http://eprints.um.edu.my/25449/
https://doi.org/10.1103/PhysRevA.101.013401
_version_ 1680857033073491968
score 13.251813

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