Nonperturbative pair production in interpolating fields
Artikel i vetenskaplig tidskrift, 2015

We compare the effects of timelike, lightlike and spacelike one-dimensional inhomogeneities on the probability of nonperturbative pair production in strong fields. Using interpolating coordinates we give a unifying picture in which the effect of the inhomogeneity is encoded in branch cuts and poles circulated by complex worldline instantons. For spacelike inhomogeneities the length of the cut is related to the existence of critical points, while for lightlike inhomogeneities the cut contracts to a pole and the instantons become contractible to points, leading to simplifications particular to the lightlike case. We calculate the effective action in fields with up to three nonzero components, and investigate its behavior under changes in field dependence.

Författare

Antony Ilderton

Chalmers, Teknisk fysik, Kondenserade materiens teori

Greger Torgrimsson

Chalmers, Teknisk fysik, Kondenserade materiens teori

Jonatan Wårdh

Chalmers, Teknisk fysik, Kondenserade materiens teori

Physical Review D - Particles, Fields, Gravitation and Cosmology

1550-7998 (ISSN)

Vol. 92 artikel nr 065001- 065001

Ämneskategorier

Astronomi, astrofysik och kosmologi

DOI

10.1103/PhysRevD.92.065001