Speaker
Hidetoshi Taya
(Keio University)
Description
I discuss high-harmonic generation from the vacuum in strong-field QED. Using the semi-classical approximation, I explicitly calculate the number of photons and the resulting harmonic spectrum in the presence of a spatially uniform linearly-polarized AC electric field, at the leading order in the fine-structure constant $\alpha$. I briefly compare the obtained results with the previous ones, e.g., a tadpole contribution in two-dimensional Dirac material [1] and the ${\mathcal O}(\alpha^2)$ contribution within the Euler-Heisenberg approach [2,3].
[1] Taya, Hongo, Ikeda, Phys. Rev. B 104, L140305 (2021).
[2] Piazza, Hatsagortsyan, Keitel, Phys. Rev. D 72, 085005 (2005).
[3] Fedotov, Narozhny, Phys. Lett. A 362, 1 (2007).
Primary author
Hidetoshi Taya
(Keio University)
