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Labun, Lance; Rafelski, Johann

doi:10.5506/aphyspolb.43.2237

Cited by 12 publications

(10 citation statements)

References 22 publications

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“…Strong electromagnetic fields have been of interest for quite some time (see e.g. [24][25][26]) and can be applied in different contexts [27]. We have demonstrated that going from Maxwell's electrodynamics to the Euler-Heisenberg theory, the strong electric field will be reduced automatically far below the pair production threshold, at least as far as the energy content of the field is concerned.…”

Section: Discussionmentioning

confidence: 96%

Short range interactions in the hydrogen atom

et al. 2018

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In calculating the energy corrections to the hydrogen levels we can identify two different types of modifications of the Coulomb potential V C , with one of them being the standard quantum electrodynamics corrections, δV , satisfying |δV | ≪ |V C | over the whole range of the radial variable r. The other possible addition to V C is a potential arising due to the finite size of the atomic nucleus and as a matter of fact, can be larger than V C in a very short range. We focus here on the latter and show that the electric potential of the proton displays some undesirable features.Among others, the energy content of the electric field associated with this potential is very close to the threshold of e + e − pair production. We contrast this large electric field of the Maxwell theory with one emerging from the non-linear Euler-Heisenberg theory and show how in this theory the short range electric field becomes smaller and is well below the pair production threshold.

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Section: Discussionmentioning

confidence: 96%

Short range interactions in the hydrogen atom

et al. 2018

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“…In ultrarelativistic nucleus-nucleus collision, a pulsed and strong magnetic field is generated, and the space-time geometry is nontrivial due to expansion and flowing fluids (that may cause horizon formation or an acoustic metric; see Refs. [21,22] for related discussions). Finally, although for lower dimensionality the magnetic field and the curvature cooperate (rather than compete), the present discussion may be of relevance in the context of strongly coupled layered materials, where curvature can be generated locally by the insertion of defects.…”

Section: Curvature Induced Chiral Gap and Magnetic Inhibitionmentioning

confidence: 99%

Geometrically Induced Magnetic Catalysis and Critical Dimensions

2015

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We discuss the combined effect of magnetic fields and geometry in interacting fermionic systems. At leading order in the heat-kernel expansion, the infrared singularity (that in flat space leads to the magnetic catalysis) is regulated by the chiral gap effect, and the catalysis is deactivated by the effect of the scalar curvature. We discover that an infrared singularity is found in higher-order terms that mix the magnetic field with curvature, and these lead to a novel form of geometrically induced magnetic catalysis. The dynamical mass squared is then modified not only due to the chiral gap effect by an amount proportional to the curvature, but also by a magnetic shift ∝(4-D)eB, where D represents the number of space-time dimensions. We argue that D=4 is a critical dimension across which the behavior of the magnetic shift changes qualitatively.

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“…For example consider a 50GeV beam (γ = 10 5 ). For a laser beam propagating against the electron beam, its field in the frame of reference of the electrons, will be enhanced by γ = 10 5 This should bring the field acting in the rest frame of the electron to a level much higher than the critical intensity [13,14,15]. 3.…”

Section: Bridging the Gap; All The Way To The Schwinger Intensity Regimementioning

confidence: 99%