Quantum corrections to generic branes: DBI, NLSM, and more

Goon, Garrett; Melville, Scott; Noller, Johannes

doi:10.1007/jhep01(2021)159

Cited by 14 publications

(12 citation statements)

References 97 publications

(173 reference statements)

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“…However, as one approaches the cutoff of the theory Λ, the existence of a UV completion will manifest itself by additional interactions (highly suppressed on cosmological scales) becoming important. Precisely what these interactions are is determined by the (unknown) UV completion, but we can infer some types of candidate additional interactions from investigating radiative corrections to generic Horndeski theories [36,[80][81][82][83][84][85][86][87][88][89][90][91]. The example set of such in- 5 Note that it is precisely the interactions that affect α T which depend on Λ and hence limit the applicability of the theory to energy scales below Λ.…”

Section: A Dark Energy and C Gw = Cmentioning

confidence: 99%

Probing the speed of gravity with LVK, LISA, and joint observations

Harry¹,

Noller²

2022

Preprint

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Theories of dark energy that affect the speed of gravitational waves c GW on cosmological scales naturally lead to a frequency-dependent transition of that speed close to the LIGO/Virgo/KAGRA (LVK) band. While observations such as GW170817 assure us that c GW is extremely close to the speed of light in the LVK band, a frequency-dependent transition below the LVK band is a smoking-gun signal for large classes of dynamical dark energy theories. Here we discuss 1) how the remnants of such a transition can be constrained with observations in the LVK band, 2) what signatures are associated with such a transition in the LISA band, and 3) how joint observations in the LVK and LISA bands allow us to place tight constraints on this transition and the underlying theories. We find that deviations of c GW can be constrained down to a level of ∼ 10 −17 in the LVK and LISA bands even for mild frequency-dependence, much stronger than existing bounds for frequency-independent c GW = c. We use the strain data from GW170817 to bound the deviation of c GW to be less than 10 −17 at 100 Hz and less than 10 −18 at 500 Hz. We also identify a particularly interesting type of transition in between the LVK and LISA bands and show how multi-band observations can constrain this further. Finally, we discuss what these current and forecasted constraints imply for the underlying dark energy theories.

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Section: A Dark Energy and C Gw = Cmentioning

confidence: 99%

Probing the speed of gravity with LVK, LISA, and joint observations

Harry¹,

Noller²

2022

Preprint

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“…It is easiest to covariantly quantize 15 this theory using the covariant background field method [90][91][92][93][94][95]. The goal is to covariantly expand the quantum field φ a (x) into fluctuations about the background field value ϕ a (x).…”

Section: The Nonlinear Sigma Modelmentioning

confidence: 99%

Infinite Distance Limits and Information Theory

Stout¹

2021

Preprint

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The classical information metric provides a unique notion of distance on the space of probability distributions with a well-defined operational interpretation: two distributions are far apart if they are readily distinguishable from one another. The quantum information metric generalizes this to the space of quantum states, and thus defines a notion of distance on an arbitrary continuous family of quantum field theories via their vacua that is proportional to the metric on moduli space when restricted appropriately. In this paper, we study this metric and its operational interpretation in a variety of examples. We specifically focus on why and how infinite distance singularities appear. We argue that two theories are infinitely far apart if they are hyper-distinguishable: that is, if they can be distinguished from one another, with certainty, using only a few measurements. We explain why such singularities appear for the simple harmonic oscillator yet are absent for quantum field theories near a typical quantum critical point, and show how an infinite distance point can emerge when a tower of fields degenerates in mass. Finally, we use this perspective to provide a potential bottom-up motivation for the Swampland Distance Conjecture and indicate how we might extend it beyond current lampposts.

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“…And lots of DBI theories and their applications to different physics systems have been very well given out, e.g., see refs. [31][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

New general DBI action, its solution to the paradox of the conversion of kinetic and potential energy in equal rights and their true applications to inflationary cosmology

Yang¹,

Xu²,

Huang³

2021

Preprint

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The Dirac-Born-Infeld (DBI) field theory in string theory is important and can provide the field of the universe's inflation. At the same time, it provides a causal mechanism for generating the original density perturbation, thereby providing the necessary density perturbation for existing the dense and sparse matter distributions of the universe. However, there is the paradox of the conversion of potential energy and kinetic energy in equal rights in string theory. Therefore, we give a new general DBI action, which enables the kinetic energy and potential energy in the action to be converted each other in equal rights, i.e., solving the paradox. Therefore, we deduce a new general DBI action, introduce it into inflationary cosmology to calculate various inflation parameters, further calculate the scalar perturbation spectrum and the tensor-scalar ratio, which are compared with Planck + WMAP9 + BAO data, the power spectrum predicted by the new general DBI inflation theory satisfies the CMB Experiment constraints, i.e., is consistent with the current theories and experimental observations. Consequently, the theory of this paper conforms to current experiments and is supplying the current theories, and also a new way of explaining the inflation of the universe.

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Quantum corrections to generic branes: DBI, NLSM, and more

Cited by 14 publications

References 97 publications

Probing the speed of gravity with LVK, LISA, and joint observations

Probing the speed of gravity with LVK, LISA, and joint observations

Infinite Distance Limits and Information Theory

New general DBI action, its solution to the paradox of the conversion of kinetic and potential energy in equal rights and their true applications to inflationary cosmology

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