Utopian Cities from 15th to 19th Century Literature: A Philosophical Investigation through 3-D Visualisation

We analyze string-theoretic large-field inflation in the regime of spontaneously-broken supergravity with conventional moduli stabilization by fluxes and non-perturbative effects. The main ingredient is a shift-symmetric Kähler potential, supplemented by flux-induced shift symmetry breaking in the superpotential. The central technical observation is that all these features are present for D7brane position moduli in Type IIB orientifolds, allowing for a realization of the axion monodromy proposal in a controlled string theory compactification. On the one hand, in the large complex structure regime the D7-brane position moduli inherit a shift symmetry from their mirror-dual Type IIA Wilson lines. On the other hand, the Type IIB flux superpotential generically breaks this shift symmetry and allows, by appealing to the large flux discretuum, to tune the relevant coefficients to be small. The shift-symmetric direction in D7-brane moduli space can then play the role of the inflaton: While the D7-brane circles a certain trajectory on the Calabi-Yau many times, the corresponding F -term energy density grows only very slowly, thanks to the above-mentioned tuning of the flux. Thus, the large-field inflationary trajectory can be realized in a regime where Kähler, complex structure and other brane moduli are stabilized in a conventional manner, as we demonstrate using the example of the Large Volume Scenario.

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“…in the large complex structure limit [52,53], which is indeed explicitly visible in the expressions derived in [54].…”

Section: A Shift-symmetric Kähler Potentialmentioning

confidence: 83%

D7-brane chaotic inflation

2014

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“…We focus on one of the latter four triangulations. In this case, unlike the aforementioned elliptic fibration M dP 0 → P 2 , the actual Mori cone of the Calabi-Yau hypersurface M Y (3,0) is strictly smaller than the Mori cone of the ambient space…”

Section: Dpmentioning

confidence: 93%

“…Let us denote by F 2 the toric diagram describing our local Calabi-Yau singularity X. 3 Now assume that ∇ has F 2 as one of its two-dimensional faces, i.e., the toric fan for X is included as a 3d cone in ∇. This implies that there is a patch of A ∇ that looks like X ×C * .…”

Section: Generalitiesmentioning

confidence: 99%

“…In other words, the associated varietyD 7 ∩D 8 = ∅ 7 is empty instead of the expected codimension two. The Mori cone for A Y (3,0) , given the above triangulation 2.14, is then given bŷ 7 We writeDi for the divisor {xi = 0} ⊂ A Y (3,0) and Di for the corresponding divisor {xi = 0} ⊂ M Y (3,0) .…”

Section: Dpmentioning

confidence: 99%

“…A convenient bottom-up approach to model building in string theory is to consider D-branes placed at local geometric singularities in a compactification manifold [1][2][3][4][5][6]. The local properties of the singularities, together with the D-branes, determine the matter and gauge content of the theory.…”

Section: Introductionmentioning

confidence: 99%

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Global embeddings for branes at toric singularities

Balasubramanian

Berglund

Braun

et al. 2012

J. High Energ. Phys.

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We describe how local toric singularities, including the Toric Lego construction, can be embedded in compact Calabi-Yau manifolds. We study in detail the addition of D-branes, including non-compact flavor branes as typically used in semi-realistic model building. The global geometry provides constraints on allowable local models. As an illustration of our discussion we focus on D3 and D7-branes on (the partially resolved) (dP 0 ) 3 singularity, its embedding in a specific Calabi-Yau manifold as a hypersurface in a toric variety, the related type IIB orientifold compactification, as well as the corresponding F-theory uplift. Our techniques generalize naturally to complete intersections, and to a large class of F-theory backgrounds with singularities.

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Individual Differences in Individualism and Collectivism Predict Ratings of Virtual Cities’ Liveability and Environmental Quality

Rubin

Morrison

2014

The Journal of General Psychology

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The present research investigated individual differences in individualism and collectivism as predictors of people's reactions to cities. Psychology undergraduate students (N = 148) took virtual guided tours around historical cities. They then evaluated the cities' liveability and environmental quality and completed measures of individualism and collectivism. Mediation analyses showed that people who scored high in self-responsibility (individualism) rated the cities as more liveable because they perceived them to be richer and better resourced. In contrast, people who scored high in collectivism rated the cities as having a better environmental quality because they perceived them to (1) provide a greater potential for community and social life and (2) allow people to express themselves. These results indicate that people's evaluations of virtual cities are based on the degree to which certain aspects of the cities are perceived to be consistent with individualist and collectivist values.

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Utopian Cities from 15th to 19th Century Literature: A Philosophical Investigation through 3-D Visualisation

Cited by 5 publications

References 0 publications

D7-brane chaotic inflation

D7-brane chaotic inflation

Global embeddings for branes at toric singularities

Individual Differences in Individualism and Collectivism Predict Ratings of Virtual Cities’ Liveability and Environmental Quality

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