Volume 120, Number 6, December 2017
|Number of page(s)||7|
|Section||The Physics of Elementary Particles and Fields|
|Published online||28 February 2018|
Emission of twisted photons from quantum vacuum
IPFN, Instituto Superior Técnico, Universidade de Lisboa - 1049-001 Lisboa, Portugal and Instituto de Física, Universidade de São Paulo - São Paulo SP, 05508-090 Brasil
Received: 23 December 2017
Accepted: 13 February 2018
Emission of twisted photons, carrying orbital angular momentum, from QED vacuum is considered. This is a new type of radiation which can be excited by a Gaussian laser pulse propagating along the axis of a magnetic wiggler. We consider quantum vacuum as described by the Heisenberg-Euler Lagrangian, and assume propagation of an ultra-intense laser pulse in a static magnetic structure. We show that, in such a configuration, vacuum emission of electromagnetic vortices can occur, at a frequency much larger than that of the intense laser pulse, which can eventually be tuned from the visible up to the XUV range. This new configuration could eventually be useful to reduce classical noise in future experiments.
PACS: 12.20.Ds – Specific calculations / 14.70.Bh – Photons / 42.50.Xa – Optical tests of quantum theory
© EPLA, 2018
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