81 citations · 342 across the 22 of their papers we have counts for
22 papers
Quantum Gravitational Hair in Gravastars and Observational Tests
Italo Perrucci, Folkert Kuipers, Roberto Casadio
Using the effective field theory of quantum gravity at second order in curvature, we calculate quantum corrections to the metric of gravastars and the closely related dark energy s…
Matching the Vilkovisky-DeWitt Effective Action of Quantum Gravity to String Theory
Xavier Calmet, Elias Kiritsis, Folkert Kuipers +1
In this work, we discuss the matching of the Vilkovisky-DeWitt effective action of quantum gravity to an example of an ultra-violet complete theory of quantum gravity. We show how…
Quantum Hair During Gravitational Collapse
Xavier Calmet, Roberto Casadio, Stephen D. H. Hsu +1
We consider quantum gravitational corrections to the Oppenheimer-Snyder metric describing time-dependent dust ball collapse. The interior metric also describes Friedmann-Lemaitre-R…
Quantum Mechanics from Stochastic Processes
Folkert Kuipers
We construct an explicit one-to-one correspondence between non-relativistic stochastic processes and solutions of the Schrodinger equation and between relativistic stochastic proce…
Stochastic Mechanics and the Unification of Quantum Mechanics with Brownian Motion
Folkert Kuipers
We unify Brownian motion and quantum mechanics in a single mathematical framework. In particular, we show that non-relativistic quantum mechanics of a single spinless particle on a…
Spacetime Stochasticity and Second Order Geometry
Folkert Kuipers
We discuss the Schwartz-Meyer second order geometry framework and its relevance to theories of quantum gravity that incorporate a notion of spacetime stochasticity or quantum foam.…
Black Holes in Quantum Gravity
Xavier Calmet, Folkert Kuipers
We review some recent results obtained for black holes using effective field theory methods applied to quantum gravity, in particular the unique effective action. Black holes are c…
Measuring the stability of fundamental constants with a network of clocks
G. Barontini, L. Blackburn, V. Boyer +41
The detection of variations of fundamental constants of the Standard Model would provide us with compelling evidence of new physics, and could lift the veil on the nature of dark m…
QSNET, a network of clocks for measuring the stability of fundamental constants
G. Barontini, V. Boyer, X. Calmet +19
The QSNET consortium is building a UK network of next-generation atomic and molecular clocks that will achieve unprecedented sensitivity in testing variations of the fine structure…
Quantum Hair from Gravity
Xavier Calmet, Roberto Casadio, Stephen D. H. Hsu +1
We explore the relationship between the quantum state of a compact matter source and of its asymptotic graviton field. For a matter source in an energy eigenstate, the graviton sta…
Analytic Continuation of Stochastic Mechanics
Folkert Kuipers
We study a (relativistic) Wiener process on a complexified (pseudo-)Riemannian manifold. Using Nelson's stochastic quantization procedure, we derive three equivalent descriptions f…
Quantum Gravitational Corrections to the Entropy of a Schwarzschild Black Hole
Xavier Calmet, Folkert Kuipers
We calculate quantum gravitational corrections to the entropy of black holes using the Wald entropy formula within an effective field theory approach to quantum gravity. The correc…
Implications of Quantum Gravity for Dark Matter
Xavier Calmet, Folkert Kuipers
In this essay we show that quantum gravity and the spin-statistics theorem have very interesting consequences for dark matter candidates. Quantum gravity can lead to fifth force ty…
Stochastic Quantization of Relativistic Theories
Folkert Kuipers
It was shown recently that stochastic quantization can be made into a well defined quantization scheme on (pseudo-)Riemannian manifolds using second order differential geometry, wh…
Stochastic Quantization on Lorentzian Manifolds
Folkert Kuipers
We embed Nelson's stochastic quantization in the Schwartz-Meyer second order geometry framework. The result is a non-perturbative theory of quantum mechanics on (pseudo)-Riemannian…
Theoretical bounds on dark matter masses
Xavier Calmet, Folkert Kuipers
In this letter, we show that quantum gravity leads to lower and upper bounds on the masses of dark matter candidates. These bounds depend on the spins of the dark matter candidates…
Bounds on Very Weakly Interacting Ultra Light Scalar and Pseudoscalar Dark Matter from Quantum Gravity
Xavier Calmet, Folkert Kuipers
In this paper we consider very weakly interacting and ultra light scalar and pseudoscalar dark matter candidates. We show that quantum gravity has important implications for such m…
Quantum corrected equations of motion in the interior and exterior Schwarzschild spacetime
Xavier Calmet, Roberto Casadio, Folkert Kuipers
In this paper we derive the leading quantum gravitational corrections to the geodesics and the equations of motion for a scalar field in the spacetime containing a constant density…
Singularities in Quantum Corrected Space-times
Xavier Calmet, Roberto Casadio, Folkert Kuipers
In this paper we consider a static and regular fluid generating a locally spherically symmetric and time-independent space-time and calculate the leading quantum corrections to the…
Singularity theorems in the effective field theory for quantum gravity at second order in curvature
Folkert Kuipers, Xavier Calmet
In this paper we discuss singularity theorems in quantum gravity using effective field theory methods. To second order in curvature, this effective field theory contains two new de…
Quantum Gravitational Corrections to a Star Metric and the Black Hole Limit
Xavier Calmet, Roberto Casadio, Folkert Kuipers
In this paper we consider the full set of quantum gravitational corrections to a star metric to second order in curvature. As we use an effective field theoretical approach, these…
Bifurcations in the RG-flow of QCD
Folkert Kuipers, Umut Gursoy, Yuri Kuznetsov
Bifurcation analysis is used to study an effective model of QCD with four-fermi interactions. Our analysis supports the scenario of a fixed point merger at the lower edge of th…