67 citations · 412 across the 9 of their papers we have counts for
9 papers
Unitarity of quantum-gravitational corrections to primordial fluctuations in the Born-Oppenheimer approach
Leonardo Chataignier, Manuel Kraemer
We revisit the calculation of quantum-gravitational corrections to the power spectra of scalar and tensor perturbations in the Born-Oppenheimer approach to quantum gravity. We focu…
Quantum-gravity effects for excited states of inflationary perturbations
David Brizuela, Claus Kiefer, Manuel Kraemer +1
We generalize former findings regarding quantum-gravitational corrections arising from a canonical quantization of a perturbed FLRW universe during inflation by considering an init…
Quantum-gravitational effects on gauge-invariant scalar and tensor perturbations during inflation: The de Sitter case
David Brizuela, Claus Kiefer, Manuel Kraemer
We present detailed calculations for quantum-gravitational corrections to the power spectra of gauge-invariant scalar and tensor perturbations during inflation. This is done by per…
Can effects of quantum gravity be observed in the cosmic microwave background?
Claus Kiefer, Manuel Kraemer
We investigate the question whether small quantum-gravitational effects can be observed in the anisotropy spectrum of the cosmic microwave background radiation. An observation of s…
Hall effects in Bose-Einstein condensates in a rotating optical lattice
Rajiv Bhat, M. Kraemer, J. Cooper +1
Using the Kubo formalism, we demonstrate fractional quantum Hall features in a rotating Bose-Einstein condensate in a co-rotating two-dimensional optical lattice. The co-rotating l…
Stability diagram and growth rate of parametric resonances in Bose-Einstein condensates in one-dimensional optical lattices
C. Tozzo, M. Kraemer, F. Dalfovo
A Bose-Einstein condensate in an optical lattice exhibits parametric resonances when the intensity of the lattice is periodically modulated in time. These resonances correspond to…