منابع مشابه
Large D-instanton effects in string theory
By reduction along the time direction, black holes in 4 dimensions yield instantons in 3 dimensions. Each of these instantons contributes individually at order exp(−|Q|/gs) to certain protected couplings in the three-dimensional effective action, but the number of distinct instantons is expected to be equal (or comparable) to the number of black hole micro-states, i.e. of order exp(Q). The same...
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The instanton–antiinstanton pair induced asymptotics of perturbation theory expansion for QCD correlators is considered. It is argued that though the true asymptotics is dominated by renormalon, the instanton-induced contribution may dominate in the intermediate asymptotics n = 5÷ 15. Obtained asymptotic formulae are valid for Nf ≤ Nc. For Nf = Nc the finite nonperturbative expression for insta...
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We study p = −1 D-brane in type IIB superstring theory. In addition to D-instanton, we obtain the D-wormhole solution in the Einstein frame. This corresponds to the ten-dimensional singular wormhole solution with infinite euclidean action.
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Duality arguments are used to determine D-instanton contributions to certain effective interaction terms of type II supergravity theories in various dimensions. This leads to exact expressions for the partition functions of the finite N D-instanton matrix model in d = 4 and 6 dimensions that generalize our previous expression for the case d = 10. These results are consistent with the fact that ...
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2020
ISSN: 1029-8479
DOI: 10.1007/jhep08(2020)075