| 1. |
- Hebenstreit, Florian, et al.
(author)
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Pair production : the view from the lightfront
- 2011
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In: Physical Review D. Particles and fields. - 0556-2821 .- 1089-4918. ; 84:12, s. 125022-
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Journal article (peer-reviewed)abstract
- We give an exact, analytic, and manifestly gauge invariant account of pair production in combined longitudinal and transverse electromagnetic fields, both depending arbitrarily on lightfront time. The instantaneous, nonperturbative probability of pair creation is given explicitly along with the spectra of the final particle yield. Our results are relevant to high-intensity QED experiments now being planned for future optical and x-ray free electron lasers.
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| 2. |
- Hebenstreit, Florian, et al.
(author)
-
Strong field effects in laser pulses : the Wigner formalism
- 2011
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In: Physical Review D. - 1550-7998 .- 1550-2368. ; 83:6
-
Journal article (peer-reviewed)abstract
- We investigate strong field vacuum effects using a phase space approach based on the Wigner formalism. We calculate the Wigner function in a strong null-field background exactly, using lightfront field theory. The Wigner function exhibits the distinct features of strong field QED: in particular we identify the effective mass in a laser pulse, compare it to the well-known mass shift in a periodic plane wave and identify signals of multi-photon absorption and emission. Finally, we show how to extend our results to descibe vacuum pair production in colliding laser pulses.
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| 3. |
- Ilderton, Anton, 1978-
(author)
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Trident pair production in strong laser pulses
- 2011
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In: Physical Review Letters. - : The American Physical Society. - 0031-9007 .- 1079-7114. ; 106:2, s. 020404-
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Journal article (peer-reviewed)abstract
- We calculate the trident pair production amplitude in a strong laser background.We allow for finite pulsedurations, while still treating the laser fields nonperturbatively in strong-field QED. Our approach revealsexplicitly the individual contributions of the one-step and two-step processes.We also expose the role gaugeinvariance plays in the amplitudes and discuss the relation between our results and the optical theorem.
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