A gauge-covariant derivation of the strong-field approximation

Laser Physics ◽  
2009 ◽  
Vol 19 (8) ◽  
pp. 1621-1625 ◽  
Author(s):  
W. Becker ◽  
D. B. Milošević
Keyword(s):  
Strong Field ◽  
Field Approximation ◽  
Covariant Derivation

Gauge dependence of the strong-field approximation: Theory vs. experiment for photodetachment of F−

2007 ◽  
Vol 275 (1) ◽  
pp. 116-122 ◽  
Author(s):  
A. Gazibegović-Busuladžić ◽  
D.B. Milošević ◽  
W. Becker
Keyword(s):  
Approximation Theory ◽  
Strong Field ◽  
Field Approximation ◽  
Gauge Dependence

Nondipole strong-field approximation for spatially structured laser fields

2019 ◽  
Vol 99 (5) ◽  
Author(s):  
Birger Böning ◽  
Willi Paufler ◽  
Stephan Fritzsche
Keyword(s):  
Strong Field ◽  
Field Approximation ◽  
Laser Fields

scholarly journals Improved local-constant-field approximation for strong-field QED codes

2019 ◽  
Vol 99 (2) ◽  
Author(s):  
A. Di Piazza ◽  
M. Tamburini ◽  
S. Meuren ◽  
C. H. Keitel
Keyword(s):  
Strong Field ◽  
Field Approximation ◽  
Constant Field

scholarly journals Gravitational time delay of signals in the Kerr metric

1986 ◽  
Vol 114 ◽  
pp. 411-416
Author(s):  
I. G. Dymnikova
Keyword(s):  
Time Delay ◽  
Strong Field ◽  
Rotation Axis ◽  
Wave Length ◽  
Field Approximation ◽  
Weak Field ◽  
Gravitational Lens ◽  
Mutual Orientation ◽  
Kerr Metric ◽  
Photon Propagation

The gravitational time delay of signals in a gravitational field of a rotating massive body is considered both in a weak field approximation and in a strong field caused by a rotating black hole. The expressions describing the time of propagation of signals are obtained by integrating the light geodesics of the Kerr metric in a frame reference of a distant observer using the Boyer-Lindquist coordinates and assuming that the wave length of radiation is much less than the characteristic scale of the field. The existence of the asymmetry in the time delay is shown depending on the mutual orientation of a photon propagation direction and of the rotation axis. As a result of this asymmetry, the effects of relative time delay are predicted and calculated for the signals focused by a rotating gravitational lens.

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