Table of Contents

Preface (S. Hossenfelder).- Astroparticle physics connections to the quantum gravity problem (M. Lorenz).- The search for a tiny hint from quantum gravity in the cosmic relic radiation (D. Brizuela, M. Kraemer).- Superfluid Helium: the Volovik Lessons (T. Lappe).- On the Paradigms of Quantum Gravity 2016 (F. Mueller).- On the Measurement of the Speed of Light in a Cavity (F. Schneiter).- Neutrino: the elusive particle bringing us closer to the world of quantum gravity (G. D'Amico).- Gravitational Waves: The “Sound” Of The Universe (J. M. Carmona).- Planck Star Phenomenology (A. M. Eller).- Gravitational measurements at small distances (H. Schmidt).- Return on investment in quantum-gravity research (G. Amelino-Camelia).- Semiclassical Gravity: A testable theory of Quantum Gravity (S. Scully).- Quantum gravity deformations (A. M. Frassino).- General Relativity, Black Holes and Planck Stars (M. Trudu).- Spacetime Structure: Analogy in Condensed Matter & Quantum Information (M. Seltmann).-Experimental Search for Quantum Gravity using Cosmology (M. Bischoff).- The Cosmological Constant and its Problems: A Review of Gravitational Aether (M. F. Wondrak).

About the Author

Dr. Sabine Hossenfelder is a research fellow at the Frankfurt Institute for Advanced Studies. Her research focuses on topics ranging from the physics of black holes to cosmology to the foundations of quantum mechanics. She devoted more than ten years to investigate the question where to best search for experimental evidence of quantum gravity. She worked at Nordita (Nordic Institute for Theoretical Physics), Stockholm, Sweden; the Perimeter Institute, Waterloo, Ontario, Canada; the University of California, Santa Barbara, USA and at the University of Arizona, USA.

Contributing Authors:
​Matthias Lorenz, Commissariat à l'énergie atomique CEA Saclay, France
David Brizuela, Manuel Kraemer, University of the Basque Country, Spain
Tim Lappe, University of Bonn, Germany
Fabian Mueller, Institute of Mathematics, University Frankfurt, Germany
Fabienne Schneiter,University Tübingen, Germany
Giacomo D'Amico, Università di Roma La Sapienza, Italy
José Manuel Carmona, Universidad de Zaragoza, Spain
Alexander Maximilian Eller, Darmstadt University of Technology, GSI Helmholtz Center, Germany
Helena Schmidt, German National Metrologic Institute (PTB), Berlin, Germany 
Giovanni Amelino-Camelia, Dipt Fisica, Sapienza University of Rome, Italy
Sabina Scully, Australian National University, Australia
Antonia Micol Frassino, Frankfurt Institute for Advanced Studies (FIAS) andUniversity Frankfurt, Germany
Matteo Trudu, University of Cagliari, Italy
Martin Seltmann, Technical University (TU) Munich, Germany
Manon Bischoff, University Mainz, Germany
Michael Florian Wondrak, FIAS, Frankfurt, Germany