Problems of intense external-field intensity in quantum electrodynamics

Nikishov, A. I.

doi:10.1007/bf01120143

Cited by 71 publications

(89 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For v > 1, QED effects such as electron spin effect and recoil must be taken into account. [21][22][23] The peak value of v can be estimated as v m $ ca 0 ðr e =k 0 Þð2p=aÞ from Eq. (3), where r e ¼ e 2 =m e c 2 is the classical electron radius, a 0 ¼ eE 0 = m e x 0 c is the normalized laser amplitude (E 0 and x 0 are the laser electric field and frequency, respectively) and k 0 ¼ 0.8 lm is the laser wavelength.…”

Section: Qed Model In Particle-in-cell Simulationsmentioning

confidence: 99%

Energy partition, γ-ray emission, and radiation reaction in the near-quantum electrodynamical regime of laser-plasma interaction

Pukhov

Nerush

et al. 2014

Physics of Plasmas

View full text Add to dashboard Cite

Articles you may be interested inOn the electrodynamic model of ultra-relativistic laser-plasma interactions caused by radiation reaction effects Phys. Plasmas 20, 113111 (2013); 10.1063/1.4835215Numerical modeling of radiation-dominated and quantum-electrodynamically strong regimes of laser-plasma interaction Phys.When extremely intense lasers (I ! 10 22 W/cm 2 ) interact with plasmas, a significant fraction of the pulse energy is converted into photon emission in the multi-MeV energy range. This emission results in a radiation reaction (RR) force on electrons, which becomes important at ultrahigh intensities. Using three-dimensional particle-in-cell simulations which include a quantum electrodynamics model for the c-photons emission, the corresponding RR force and electron-positron pair creation, the energy partition in the laser-plasma system is investigated. At sufficiently high laser amplitudes, the fraction of laser energy coupled to electrons decreases, while the energy converted to c-photons increases. The interaction becomes an efficient source of c-rays when I > 10 24 W/cm 2 , with up to 40% of the laser energy converted to high-energy photons. A systematic study of energy partition and c-photon emission angle shows the influence of laser intensity and polarization for two plasma conditions: high-density carbon targets and a low-density hydrogen targets. We find that in the opaque region, the laser-to-photon conversion efficiency scales as I 3=2 0

show abstract

Section: Qed Model In Particle-in-cell Simulationsmentioning

confidence: 99%

Energy partition, γ-ray emission, and radiation reaction in the near-quantum electrodynamical regime of laser-plasma interaction

Pukhov

Nerush

et al. 2014

Physics of Plasmas

View full text Add to dashboard Cite

show abstract

“…[27], respectively, and in Ref. [28].) The fact that we are assuming that our source is under the influence of a gravitational force rather than being immersed in an electromagnetic field is not relevant in this particular case, since the neutrinos are chargeless (An account on the degradation of the neutrinos' energy in strong magnetic fields can be found in Ref.…”

Section: B Fermionic Casementioning

confidence: 99%

Semiclassical approach to the decay of protons in circular motion under the influence of gravitational fields

Fregolente¹,

Matsas²,

Vanzella³

2006

Phys. Rev. D

View full text Add to dashboard Cite

We investigate the possible decay of protons in geodesic circular motion around neutral compact objects. Weak and strong decay rates and the associated emitted powers are calculated using a semiclassical approach. Our results are discussed with respect to distinct ones in the literature, which consider the decay of accelerated protons in electromagnetic fields. A number of consistency checks are presented along the paper.

show abstract

“…There is an interesting interpretation of this result as a virial expansion [26,27,28], in which we write 6) where…”

Section: The Qed Effective Actionmentioning

confidence: 99%

“…But we should remember that 2 h Im Γ ≈ tr p n p is an approximation. The higher order terms in the sum (2.7) correspond to the coherent production of multiple pairs [26,27,28] in the same spacetime volume λ 4 c , and quantum statistics effects become important. It would be very interesting if these higher order correlations could be probed experimentally, but at present we are concentrating on being able to measure directly the first term.…”

Section: Volmentioning

confidence: 99%