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Perturbative Approaches to Nonperturbative Quantum Gravity
We discuss the birth of the nonperturbative approach to quantum gravity known as quantum Einstein gravity, in which the gravitational interactions...
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Scalaron Decay in Perturbative Quantum Gravity
AbstractA certain quadratic gravity model provides a successfully inflationary scenario. The inflation is driven by the new scalar degree of freedom...
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The Background Information About Perturbative Quantum Gravity
The purpose of this chapter is to give a general introduction and status review on the perturbative approach to quantum gravity (QG). This text is a...
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Gauge-invariant coefficients in perturbative quantum gravity
Heat kernel methods are useful for studying properties of quantum gravity. We recompute the first three heat kernel coefficients in perturbative...
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Lattice Quantum Gravity: EDT and CDT
This chapter contains an overview of the use of so-called Euclidean dynamical triangulations (EDT) and causal dynamical triangulations (CDT) as...
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Quantum Gravity
It is not clear at all what is the problem in quantum gravity (cf. [3] or [8] for general reviews, written in the same spirit as the present one)....
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Perturbative unorientable JT gravity and matrix models
We consider an orthogonal polynomial formulation of the double scaling limit of multicritical matrix models in the β = 1 Dyson-Wigner class. They...
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Causality, unitarity and stability in quantum gravity: a non-perturbative perspective
Resumming quantum fluctuations at the level of the gravitational path integral is expected to result in non-local effective actions and thus in a...
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Loop Quantum Gravity and planck Scale Phenomenology
Of the different approaches to quantum gravity, the best developed, from the point of view of addressing the key theoretical questions a quantum...
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Introduction to Perturbative Quantum Field Theory
The first chapter is a short, but largely self-contained, introduction to perturbative quantum field theory and its description in terms of Feynman...
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Perturbative approach to time-dependent quantum solitons
Recently we have introduced a lightweight, perturbative approach to quantum solitons. Thus far, our approach has been largely limited to...
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Off-shell divergences in quantum gravity
We investigate off-shell perturbative renormalisation of pure quantum gravity for both background metric and quantum fluctuations. We show that at...
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Scaling solutions for asymptotically free quantum gravity
We compute scaling solutions of functional flow equations for quantum grav- ity in a general truncation with up to four derivatives of the metric....
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Quantum gravity fluctuations in the timelike Raychaudhuri equation
We consider a timelike geodesic congruence in the presence of perturbative quantum fluctuations of the spacetime metric. We calculate the change in...
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Cosmological Applications of Loop Quantum Gravity
After a brief introduction to classical and quantum gravity we discuss applications of loop quantum gravity in the cosmological realm. This includes...
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Holography and localization of information in quantum gravity
Within the AdS/CFT correspondence, we identify a class of CFT operators which represent diff-invariant and approximately local observables in the...
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Locally Covariant Approach to Effective Quantum Gravity
Despite the fact that quantum gravity is non-renormalizable, a consistent and mathematically rigorous construction of a perturbation series is...
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Loop Quantum Gravity and Quantum Information
We summarize recent developments at the interface of quantum gravity and quantum information and discuss applications to the quantum geometry of...
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Lorentzian quantum gravity via Pachner moves: one-loop evaluation
Lorentzian quantum gravity is believed to cure the pathologies encountered in Euclidean quantum gravity, such as the conformal factor problem. We...
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The Functional Renormalization Group in Quantum Gravity
The gravitational asymptotic safety program envisions a high-energy completion of the gravitational interactions by an interacting renormalization...