TY  - SER
AU  - Ferreira,Robson
AU  - Gavrilov,Sergey P.
AU  - Gitman,Dmitri M.
AU  - Adorno,Tiago C.
TI  - Role of switching-on and -off effects in the vacuum instability
KW  - рождение частиц
KW  - Швингера эффект
KW  - внешнее поле, зависящее от времени
KW  - Клейна-Гордона уравнение
KW  - Дирака уравнение
KW  - статьи в журналах
N1  - Библиогр.: 14 назв
N2  - We find exact differential mean numbers of fermions and bosons created from the vacuum due to a composite electric field of special configuration. This configuration imitates a finite switching-on and -off regime and consists of fields that switch on exponentially from the infinitely remote past, remains constant during a certain interval T and switch off exponentially to the infinitely remote future. We show that calculations in the slowly varying field approximation are completely predictable in the framework of a locally constant field approximation. Beyond the slowly varying field approximation, we study effects of fast switching on and off in a number of cases when the size of the dimensionless parameter eE−−−√T is either close or exceeds the threshold value that determines the transition from a regime sensitive to on–off parameters to the slowly varying regime for which these effects are secondary
UR  - http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000724009
ER  -