Scalar field wormholes

Brown, J. David; Burgess, C.P.; Kshirsagar, Abhijit K.; Whiting, B. F.; York, James W.

doi:10.1016/0550-3213(89)90101-6

Cited by 36 publications

(30 citation statements)

References 16 publications

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“…This is of course already known for Euclidean wormholes, see e.g. [9,28,[75][76][77][78][79][80][81] and also for C ≥ 0, see e.g. [17,75].…”

Section: The Limit Of Validity Of Gravitational Instanton Actionsmentioning

confidence: 60%

“…This problem has been intensively investigated in the past, see e.g. [1,28,[76][77][78][79][80][81][82][83][84][85][86][87][88][89] and our present understanding mainly derives from [86][87][88]. Indeed, it should be possible to resolve the problem by dualising under the Euclidean path integral and following the fate of the instanton solution.…”

Section: Jhep02(2017)097mentioning

confidence: 99%

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Can gravitational instantons really constrain axion inflation?

Hebecker¹,

Mangat²,

Theisen

et al. 2017

J. High Energ. Phys.

100

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Axions play a central role in inflationary model building and other cosmological applications. This is mainly due to their flat potential, which is protected by a global shift symmetry. However, quantum gravity is known to break global symmetries, the crucial effect in the present context being gravitational instantons or Giddings-Strominger wormholes. We attempt to quantify, as model-independently as possible, how large a scalar potential is induced by this general quantum gravity effect. We pay particular attention to the crucial issue which solutions can or cannot be trusted in the presence of a moduli-stabilisation and a Kaluza-Klein scale. An important conclusion is that, due to specific numerical prefactors, the effect is surprisingly small even in UV-completions with the highest possible scale offered by string theory.As we go along, we discuss in detail Euclidean wormholes, cored and extremal instantons, and how the latter arise from 5d Reissner-Nordström black holes. We attempt to dispel possible doubts that wormholes contribute to the scalar potential by an explicit calculation. We analyse the role of stabilised dilaton-like moduli. Finally, we argue that Euclidean wormholes may be the objects satisfying the Weak Gravity Conjecture extended to instantons.

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“…This is of course already known for Euclidean wormholes, see e.g. [9,28,[75][76][77][78][79][80][81] and also for C ≥ 0, see e.g. [17,75].…”

Section: The Limit Of Validity Of Gravitational Instanton Actionsmentioning

confidence: 60%

Section: Jhep02(2017)097mentioning

confidence: 99%

Can gravitational instantons really constrain axion inflation?

Hebecker¹,

Mangat²,

Theisen

et al. 2017

J. High Energ. Phys.

100

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show abstract

“…The reason is that Derrick's theorem forbids purely scalar 'instantons' (nonconstant finite action solution) and 'solitons' (non-constant time-independent finite energy solutions) in two or more space-like dimensions [3,4]. 1 It is well known that there is a class of axionic instanton solutions which circumvents this no go theorem, in particular axionic wormhole-type solutions [5,6,7,8], the D-instanton solution of type-IIB supergravity [9,10] 2 and hypermultiplet and vector multiplet instanton solutions in N = 2 string compactifications [11,12,13,14,15,16,17]. There are three different approaches to such axionic instantons.…”

Section: Introductionmentioning

confidence: 99%

Euclidean actions, instantons, solitons and supersymmetry

Mohaupt¹,

Waite²

2011

J. Phys. A: Math. Theor.

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“…The vertex operator is obtained from the requirement that ((...)(...)'), = ((..*) x V), ((. ..)' x V), (12) In particular, one must have w, = (lV)i,…”

mentioning

confidence: 99%

“…(12) must be interpreted carefully when the wormhole background breaks symmetries. The corresponding integrals over zero modes must be extracted explicitly.The left hand side in(12) then depends explicitly on the particular configuration.Correspondingly, the vertex operator on the right hand side will generically depend on the parameters that specify such configuration.The full effect of the wormhole is then reproduced not just by introducing the vertex operator, but by summing over the corresponding parameters.A prototypical example is the translational invariance of the center of the wormhole when viewed from either end.…”

mentioning

confidence: 99%