Effective Mass Signatures in Multiphoton Pair Production

Kohlfürst, Christian; Gies, Holger; Alkofer, Reinhard

doi:10.1103/physrevlett.112.050402

Cited by 87 publications

(113 citation statements)

References 46 publications

(65 reference statements)

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“…'s 7 and 8. For explicit examples see [51] for nonlinear Compton scattering, [40] for stimulated pair production and [52] for Schwinger pair production.…”

Section: Squaring (62) This Implies the Threshold Valuesmentioning

confidence: 99%

Vacuum refractive indices and helicity flip in strong-field QED

et al. 2014

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Vacuum birefringence is governed by the amplitude for a photon to flip helicity or polarisation state in an external field. Here we calculate the flip and non-flip amplitudes in arbitrary plane wave backgrounds, along with the induced spacetime-dependent refractive indices of the vacuum. We compare the behaviour of the amplitudes in the low energy and high energy regimes, and analyse the impact of pulse shape and energy. We also provide the first lightfront-QED derivation of the coefficients in the Heisenberg-Euler effective action.

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“…'s 7 and 8. For explicit examples see [51] for nonlinear Compton scattering, [40] for stimulated pair production and [52] for Schwinger pair production.…”

Section: Squaring (62) This Implies the Threshold Valuesmentioning

confidence: 99%

Vacuum refractive indices and helicity flip in strong-field QED

et al. 2014

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“…This phenomenon is commonly known as a channel-closing effect (see, e.g., Ref. [57,58]). The positions of the channel closings are marked by the vertical dashed lines in Fig.…”

Section: E Total Number Of Electron-positron Pairsmentioning

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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“…A most spectacular quantum process is electron-positron pair production from the vacuum in the presence of very strong electric fields exceeding the Schwinger limit of about 10 16 V/cm [1][2][3]. Recent advances in laser technologies bring the observation of such non-perturbative dynamical phenomena into reach [4,5], and possible experimental signatures have been investigated extensively [6][7][8][9][10][11].…”

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confidence: 99%

Anomaly-Induced Dynamical Refringence in Strong-Field QED

2016

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We investigate the impact of the Adler-Bell-Jackiw anomaly on the nonequilibrium evolution of strong-field quantum electrodynamics (QED) using real-time lattice gauge theory techniques. For field strengths exceeding the Schwinger limit for pair production, we encounter a highly absorptive medium with anomaly-induced dynamical refractive properties. In contrast to earlier expectations based on equilibrium properties, where net anomalous effects vanish because of the trivial vacuum structure, we find that out-of-equilibrium conditions can have dramatic consequences for the presence of quantum currents with distinctive macroscopic signatures. We observe an intriguing tracking behavior, where the system spends longest times near collinear field configurations with maximum anomalous current. Apart from the potential relevance of our findings for future laser experiments, similar phenomena related to the chiral magnetic effect are expected to play an important role for strong QED fields during initial stages of heavy-ion collision experiments.

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Effective Mass Signatures in Multiphoton Pair Production

Cited by 87 publications

References 46 publications

Vacuum refractive indices and helicity flip in strong-field QED

Vacuum refractive indices and helicity flip in strong-field QED

Electron-positron pair production in a bifrequent oscillating electric field

Anomaly-Induced Dynamical Refringence in Strong-Field QED

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