Gauge/gravity dualities and bulk phase transitions

Faedo, Antón F.; Piai, Maurizio; Schofield, Daniel

doi:10.1103/physrevd.89.106001

Cited by 15 publications

(6 citation statements)

References 83 publications

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“…We will show that the procedure yields the same results as those discussed in the bulk of the paper, in the physical region. The existence of spurious phase-transitions in the gravity side of the gauge-gravity correspondence has been observed before, though in a different context, dealing with the treatment in the probe approximation of extended object embedded in curved backgorunds [141]. We stress that the phase transition is not a feature of the field theory, but rather of the regulated gravity dual (although it should be possible to interpret our results in terms of a finite cutoff in the field theory).…”

Section: An Alternative Approach To the Free Energy Densitysupporting

confidence: 61%

Dilatonic states near holographic phase transitions

Elander,

Piai,

Roughley

2020

Preprint

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The spectrum of bound states of special strongly coupled confining field theories might include a parametrically light dilaton, associated with the formation of enhanced condensates that break (approximate) scale invariance spontaneously. It has been suggested in the literature that such a state may arise in connection with the theory being close to the unitarity bound in holographic models. We extend these ideas to cases where the background geometry is non-AdS, and the gravity description of the dual confining field theory has a top-down origin in supergravity.We exemplify this programme by studying the circle compactification of Romans sixdimensional half-maximal supergravity. We uncover a rich space of solutions, many of which were previously unknown in the literature. We compute the bosonic spectrum of excitations, and identify a tachyonic instability in a region of parameter space for a class of regular background solutions. A tachyon only exists along an energetically disfavoured (unphysical) branch of solutions of the gravity theory; we find evidence of a first-order phase transition that separates this region of parameter space from the physical one. Along the physical branch of regular solutions, one of the lightest scalar particles is approximately a dilaton, and it is associated with a condensate in the underlying theory. Yet, because of the location of the phase transition, its mass is not parametrically small, and it is, coincidentally, the next-to-lightest scalar bound state, rather than the lightest one.

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Section: An Alternative Approach To the Free Energy Densitysupporting

confidence: 61%

Dilatonic states near holographic phase transitions

Elander,

Piai,

Roughley

2020

Preprint

Self Cite

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show abstract

“…We present firm evidence of the existence of a phase transition in the gravity theory (see also Ref. [84]). The parametrically light dilaton emerges along the portion of the regular branch of solutions which contains metastable solutions, the lifetime of which is not known (but see Ref.…”

Section: Introductionsupporting

confidence: 61%

A light dilaton in a metastable vacuum

Elander,

Piai,

Roughley

2020

Preprint

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We identify a parametrically light dilaton by studying the perturbations of metastable vacua along a branch of regular supergravity backgrounds that are dual to four-dimensional confining field theories. The branch includes also stable and unstable solutions. The former encompass, as a special case, the geometry proposed by Witten as a holographic model of confinement. The latter approach a supersymmetric solution, by enhancing a condensate in the dual field theory. A phase transition separates the space of stable backgrounds from the metastable ones. In proximity of the phase transition, one of the lightest scalar states inherits some of the properties of the dilaton, despite not being particularly light.

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“…These limits need not commute. A similar situation but in a different context was encountered in [19] and we will find this to be the case in theories with non-local UV-behavior. Similarly we will observe that a local and honest UV-completion of non-local theories plays the same role as the regularisation with a cutoff.…”

Section: Jhep06(2014)005mentioning

confidence: 89%

Confinement, phase transitions and non-locality in the entanglement entropy

Kol

Núñez

Schofield

et al. 2014

J. High Energ. Phys.

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In this paper we study the conjectural relation between confinement in a quantum field theory and the presence of a phase transition in its corresponding entanglement entropy. We determine the sufficient conditions for the latter and compare to the conditions for having a confining Wilson line. We demonstrate the relation in several examples. Superficially, it may seem that certain confining field theories with a non-local high energy behavior, like the dual of D5 branes wrapping a two-cycle, do not admit the corresponding phase transition. However, upon closer inspection we find that, through the introduction of a regulating UV-cutoff, new eight-surface configurations appear, that satisfy the correct concavity condition and recover the phase transition in the entanglement entropy. We show that a local-UV-completion to the confining non-local theories has a similar effect to that of the aforementioned cutoff.

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Gauge/gravity dualities and bulk phase transitions

Cited by 15 publications

References 83 publications

Dilatonic states near holographic phase transitions

Dilatonic states near holographic phase transitions

A light dilaton in a metastable vacuum

Confinement, phase transitions and non-locality in the entanglement entropy

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