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Nonperturbative pair production in interpolating fields

Anton Ilderton (Institutionen för teknisk fysik, Kondenserade materiens teori) ; Greger Torgrimsson (Institutionen för teknisk fysik, Kondenserade materiens teori) ; Jonatan Wårdh (Institutionen för teknisk fysik, Kondenserade materiens teori)
Physical Review D (1550-7998). Vol. 92 (2015), 6, p. artikel nr 065001.
[Artikel, refereegranskad vetenskaplig]

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.



Denna post skapades 2015-09-17. Senast ändrad 2017-07-06.
CPL Pubid: 222686

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Kondenserade materiens teori (1900-2015)

Ämnesområden

Astronomi, astrofysik och kosmologi

Chalmers infrastruktur