Remarks on brane and antibrane dynamics

Michel, Ben; Mintun, Eric; Polchinski, Joseph; Puhm, Andrea; Saad, Philip

doi:10.48550/arxiv.1412.5702

Cited by 41 publications

(80 citation statements)

References 20 publications

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“…Both classes of solutions feature a peculiar property that has been the origin of an ungoing debate: due to the differences in charges, the fluxes are electromagnetically (and gravitationally) attracted to the branes in such a way that a singular flux cloud is formed around the branes [9,[12][13][14]. This was first uncovered in [3,4] and by now a vast literature on this exists, with a formal proof for this unavoidable singularity presented in [15,16] 1 .…”

Section: Introductionmentioning

confidence: 99%

“…This was first uncovered in [3,4] and by now a vast literature on this exists, with a formal proof for this unavoidable singularity presented in [15,16] 1 . Since fluxes can materialise into actual branes [6] one is tempted to conclude that a singular, or large, flux pile-up leads to a quick annihilation of the flux with the antibrane, possibly making the solution perturbatively unstable [13,19] (see also [14] for recent comments on this). This picture is strengthened by the absence of regular solutions at finite temperature with flat worldvolume [16,20,21].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Recently this interpretation of a perturbative decay has been challenged by some good arguments [14,22]. First of all it has been claimed that the singularity will get resolved by stringy corrections in such a way that the resulting flux clumping is small enough for at least a single antibrane to be meta-stable [14]. This can very well be correct and is 1 Around orientifolds this phenomenon does not occur since they gravitationally repel the flux as much as it is attracted [17].…”

Section: Introductionmentioning

confidence: 99%

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Smeared antibranes polarise in AdS

Gautason

Truijen

Riet

2015

J. High Energ. Phys.

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In the recent literature it has been questioned whether the local backreaction of antibranes in flux throats can induce a perturbative brane-flux decay. Most evidence for this can be gathered for D6 branes and Dp branes smeared over 6 − p compact directions, in line with the absence of finite temperature solutions for these cases. The solutions in the literature have flat worldvolume geometries and non-compact transversal spaces. In this paper we consider what happens when the worldvolume is AdS and the transversal space is compact. We show that in these circumstances brane polarisation smoothens out the flux singularity, which is an indication that brane-flux decay is prevented. This is consistent with the fact that the cosmological constant would be less negative after braneflux decay. Our results extend recent results on AdS 7 solutions from D6 branes to AdS p+1 solutions from Dp branes. We show that supersymmetry of the AdS solutions depend on p non-trivially.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Smeared antibranes polarise in AdS

Gautason

Truijen

Riet

2015

J. High Energ. Phys.

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show abstract

“…Since the discovery [30][31][32] that the backreaction of antibranes leads to singular H 3 and F 6−p fluxes (in addition to the normal F p+2 singularity) it has been questioned whether the backreaction invalidates the probe approximation and can cause perturbative instabilities [5,12,[33][34][35][36][37], but see also [38] [26] for arguments against this interpretation. What obstructs a clear argument to settle the debate is a solution of a localised antibrane and an understanding of its decay channel in the SUGRA limit.…”

Section: Discussionmentioning

confidence: 99%

The many faces of brane-flux annihilation

Gautason

Truijen

Riet

2015

J. High Energ. Phys.

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Fluxes can decay via the nucleation of Brown-Teitelboim bubbles, but when the decaying fluxes induce D-brane charges this process must be accompanied with an annihilation of D-branes. This occurs via dynamics inside the bubble wall as was well described for D3 branes annihilating against 3-form fluxes. In this paper we extend this to the other Dp branes with p smaller than seven. Generically there are two decay channels: one for the RR flux and one for the NSNS flux. The RR channel is accompanied by brane annihilation that can be understood from the Dp branes polarising into D(p + 2) branes, whereas the NSNS channel corresponds to Dp branes polarising into NS5 branes or KK5 branes. We illustrate this with the decay of antibranes probing local toroidal throat geometries obtained from T-duality of the D6 solution in massive type IIA. We show that Dp branes are metastable against annihilation in these backgrounds, at least at the probe level.

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De Sitter vs Quintessence in String Theory

Cicoli

Alwis

Maharana

et al. 2018

Fortschritte der Physik

190

223

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De Sitter solutions have been recently conjectured to be incompatible with quantum gravity. In this paper we critically assess the progress and challenges of different mechanisms to obtain de Sitter vacua in string compactifications and compare them to quintessence models. We argue that, despite recent criticisms, de Sitter models reached a level of concreteness and calculational control which has been improving over time. On the other hand, building string models of quintessence appears to be more challenging and requires additional fine‐tuning. We discuss the tension between the swampland conjecture and the Higgs potential and find examples which can evade fifth‐force bounds even if they seem very hard to realise in string theory. We also comment on the tension with low‐redshift data and explore ultra‐light axions from string theory as dark energy candidates.

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Remarks on brane and antibrane dynamics

Cited by 41 publications

References 20 publications

Smeared antibranes polarise in AdS

Smeared antibranes polarise in AdS

The many faces of brane-flux annihilation

De Sitter vs Quintessence in String Theory

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