Nonperturbative QED vacuum birefringence

Денисов, В И; Dolgaya, E. E.; Соколов, В. А.

doi:10.1007/jhep05(2017)105

Cited by 19 publications

(17 citation statements)

References 29 publications

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“…Analogous considerations are possible beyond the perturbative weak field limit, e.g., in strong magnetic fields; cf. [528,529,248,530,513,531,532] for recent studies in this parameter regime. The phase difference accumulated by the probe light of wavelength λ (frequency ω = 2π/λ) after traversing a field extending over a length L is Φ = 2π(L/λ)∆n with ∆n = n 2 − n 1 .…”

Section: Vacuum Birefringence and Diffractionmentioning

confidence: 99%

Advances in QED with intense background fields

Fedotov¹,

Ilderton²,

Karbstein³

et al. 2022

Preprint

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Upcoming and planned experiments combining increasingly intense lasers and energetic particle beams will access new regimes of nonlinear, relativistic, quantum effects. This improved experimental capability has driven substantial progress in QED in intense background fields. We review here the advances made during the last decade, with a focus on theory and phenomenology. As ever higher intensities are reached, it becomes necessary to consider processes at higher orders in both the number of scattered particles and the number of loops, and to account for non-perturbative physics (e.g. the Schwinger effect), with extreme intensities requiring resummation of the loop expansion. In addition to increased intensity, experiments will reach higher accuracy, and these improvements are being matched by developments in theory such as in approximation frameworks, the description of finite-size effects, and the range of physical phenomena analysed. Topics on which there has been substantial progress include: radiation reaction, spin and polarisation, nonlinear quantum vacuum effects and connections to other fields including physics beyond the Standard Model.

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Section: Vacuum Birefringence and Diffractionmentioning

confidence: 99%

Advances in QED with intense background fields

Fedotov¹,

Ilderton²,

Karbstein³

et al. 2022

Preprint

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“…16 The explicit examples are BI [1], logarithmic [8] and double-logarithmic [13] models of nonlinear electrodynamics. 17 Different theoretical and experimental pieces of evidence indicate that the value of the nonlinear parameter (β) should be (perhaps much) larger than the values predicted by BI theory, e.g.,…”

Section: Summary and Discussionmentioning

confidence: 99%

“…For example, the vacuum birefringence phenomenon is present in logarithmic and exponential models of nonlinear electrodynamics, while it is absent in BI theory [9,14]. This is of importance since QED predicts the vacuum birefringence as well [15][16][17] and empirical evidence for this phenomenon has now been found [18][19][20]. On the other hand, the dual symmetry (the electric-magnetic duality) seems to be only present in BI theory [21,22] but not in the other models of BI-type U (1) gauge theories.…”

Section: Introductionmentioning

confidence: 99%

Self-energy problem, vacuum polarization, and dual symmetry in Born-Infeld-type $U(1)$ gauge theories

Dehghani,

Setare,

Zarepour

2021

Preprint

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We extensively explore three different aspects of Born-Infeld (BI) type nonlinear U (1) gauge-invariant modifications of Maxwell's classical electrodynamics (also known as BI-type nonlinear electrodynamics) and bring some new perspectives on these theories. First, within the framework of exponential U (1) gauge theory, it is explicitly proved that although the electric field at the location of the elementary point charges is not finite, but the total electrostatic field energy is finite. Motivated by this observation together with a wealth of evidence, we conjecture that all theories in 4-dimensional spacetime that belong to the BI family result in finite self-energy for elementary charged particles. In higher dimensions, it is found that the weak-field coupling limit of BI-type theories, which is identified as the weak field limit of effective Euler-Heisenberg (EH) theory, does not possess a regularizing ability to make the self-energy of a point charge finite, which implies that the conjecture may not hold for some BI-type theories. However, we explicitly prove that BI, logarithmic and exponential U (1) gauge theories in arbitrary dimensions result in finite self-energy as well. Next, we classically study the problem of vacuum polarization effects and then systematically make a connection between all BI-type theories and QED. It is shown that all the BI-type theories classically predict the vacuum polarization effects, in which the final results are exactly in one-to-one correspondence with QED and the effective EH theory up to the leading order of corrections. Finally, we present a new, simple proof indicating that BI theory is the only theory with dual symmetry property (electric-magnetic duality) which reduces to the effective EH theory in the weak-field limit. The dual symmetry is broken when we demand an exact one-to-one correspondence in the weak-field limit with QED due to the vacuum polarization effects.

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“…the process of vacuum birefringence in QED. This process has been extensively studied [55][56][57][58][59][60][61][62][63][64][65][66], but not yet experimentally observed. Therefore the clear demonstration of the pair production rate's dependence on the relative polarization is an indirect detection of the vacuum birefringence of QED.…”

Section: Discussionmentioning

confidence: 99%

Numerical approach to the semiclassical method of pair production for arbitrary spins and photon polarization

Wistisen

2020

Phys. Rev. D

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In this paper we show how to recast the results of the semiclassical method of Baier, Katkov & Strakhovenko for pair production, including the possibility of specifying all the spin states and photon polarization, in a form that is suitable for numerical implementation. In this case, a new type of integral appears in addition to the ones required for the radiation emission process. We compare the resulting formulas with those obtained for a short pulse plane wave external field by using the Volkov state. We investigate the applicability of the local constant field approximation for the proposed upcoming experiments at FACET II at SLAC and LUXE at DESY. Finally, we provide results on the dependence of the pair production rate on the relative polarization between a linearly polarized laser pulse and a linearly polarized incoming high energy photon. We observe that even in the somewhat intermediate intensity regime of these experiments, there is roughly a factor of 2 difference between the pair production rates corresponding to the two relative photon polarizations, which is of interest in light of the vacuum birefringence of QED.

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Nonperturbative QED vacuum birefringence

Cited by 19 publications

References 29 publications

Advances in QED with intense background fields

Advances in QED with intense background fields

Self-energy problem, vacuum polarization, and dual symmetry in Born-Infeld-type $U(1)$ gauge theories

Numerical approach to the semiclassical method of pair production for arbitrary spins and photon polarization

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