Momentum spectra for dynamically assisted Schwinger pair production

Orthaber, Markus; Hebenstreit, Florian; Alkofer, Reinhard

doi:10.1016/j.physletb.2011.02.053

Cited by 112 publications

(124 citation statements)

References 37 publications

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“…If the frequency exceeds this threshold value γ ω > γ crit ω , on the other hand, the instanton trajectory is reflected at the poles (i.e., b > 0) and thus the instanton action (4.2) is reduced by the weak temporal pulse ∝ E , leading to a significant enhancement of the pair creation probability. This enhancement is an example of the dynamically assisted Sauter-Schwinger effect, see [67][68][69][70][71][72], for an inhomogeneous electric field. In the homogeneous limit γ k ↓ 0, the threshold value (4.6) approaches γ crit ω = π/2 consistent with the results of [67].…”

Section: Tunneling Probabilitymentioning

confidence: 93%

Dynamically assisted Sauter-Schwinger effect in inhomogeneous electric fields

Schneider

Schützhold

2016

J. High Energ. Phys.

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Via the world-line instanton method, we study electron-positron pair creation by a strong (but sub-critical) electric field of the profile E/ cosh 2 (kx) superimposed by a weaker pulse E / cosh 2 (ωt). If the temporal Keldysh parameter γ ω = mω/(qE) exceeds a threshold value γ crit ω which depends on the spatial Keldysh parameter γ k = mk/(qE), we find a drastic enhancement of the pair creation probability -reporting on what we believe to be the first analytic non-perturbative result for the interplay between temporal and spatial field dependences E(t, x) in the Sauter-Schwinger effect. Finally, we speculate whether an analogous effect (drastic enhancement of tunneling probability) could occur in other scenarios such as stimulated nuclear decay, for example.

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Section: Tunneling Probabilitymentioning

confidence: 93%

Dynamically assisted Sauter-Schwinger effect in inhomogeneous electric fields

Schneider

Schützhold

2016

J. High Energ. Phys.

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“…The connection between the in-operators and the instantaneous ones involved in Eqs. (2) and (3) [32,35,39,50,51]. In particular, by following the notation of Ref.…”

Section: Quantum Kinetic Approachmentioning

confidence: 99%

“…The study of such a problem was carried out by taking the slow laser pulse as a constant electric field reducing the problem to that of a photon-stimulated Schwinger pair creation. The idea has been further extended to the case in which both pulses are Sauter fields with different time scales [32,33]. However, in more realistic setups it is expected that the subcycle structure of an oscillating electric field (OEF) plays a relevant role as it provides a phenomenology characterized by resonant effects and Rabi-like oscillations [34][35][36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Electron-positron pair production in a bifrequent oscillating electric field

2014

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The production of electron-positron pairs from the quantum vacuum polarized by the superposition of a strong and a perturbative oscillating electric field mode is studied. Our outcomes rely on a nonequilibrium quantum field theoretical approach, described by the quantum kinetic BoltzmannVlasov equation. By superimposing the perturbative mode, the characteristic resonant effects and Rabi-like frequencies in the single-particle distribution function are modified, as compared to the predictions resulting from the case driven by a strong oscillating field mode only. This is demonstrated in the momentum spectra of the produced pairs. Moreover, the dependence of the total number of pairs on the intensity parameter of each mode is discussed and a strong enhancement found for large values of the relative Keldysh parameter.

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“…The enhancement of Schwinger type pair production by an assisting field has been considered already in references [7,[16][17][18][19][20][21][22][23][24], e.g., for (i) a constant field plus some pulse with or without subcycle structures [20];…”

Section: Introductionmentioning

confidence: 99%

Assisted dynamical Schwinger effect: pair production in a pulsed bifrequent field

et al. 2016

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Abstract. Electron-positron pair production by the superposition of two laser pulses with different frequencies and amplitudes is analyzed as a particular realization of the assisted dynamic Schwinger effect. It is demonstrated that, within a non-perturbative kinetic equation framework, an amplification effect is conceivable for certain parameters. When both pulses have wavelengths longer than the Compton wavelength, the residual net density of produced pairs is determined by the resultant field strength. The number of pairs starts to grow rapidly if the wavelength of the high-frequency laser component gets close to the Compton wavelength.

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Momentum spectra for dynamically assisted Schwinger pair production

Cited by 112 publications

References 37 publications

Dynamically assisted Sauter-Schwinger effect in inhomogeneous electric fields

Dynamically assisted Sauter-Schwinger effect in inhomogeneous electric fields

Electron-positron pair production in a bifrequent oscillating electric field

Assisted dynamical Schwinger effect: pair production in a pulsed bifrequent field

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