20-27 February 2019
HSE Study Center “Voronovo”
Europe/Moscow timezone

Secularly growing loop corrections in the Yukawa model

25 Feb 2019, 17:42
HSE Study Center “Voronovo”

HSE Study Center “Voronovo”

Voronovskoe, Moscow Russian Federation
Talk [10+2 min] Young Scientist Forum


Mr Dmitrii Trunin (Moscow Institute of Physics and Technology)


We consider 1+1 Yukawa model in the strong background field (namely, linearly growing scalar field). We derive exact harmonics, calculate the fermionic current and find that it grows logarithmically. We reproduce this result by integrating out the fermion degrees of freedom in the effective action. Finally, we calculate loop corrections to the scalar and fermion propagators and observe that they receive growing with time infrared contributions. This indicates the breakdown of the perturbation theory.

Primary author

Mr Dmitrii Trunin (Moscow Institute of Physics and Technology)


Prof. Emil Akhmedov (ITEP)

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