Results 21 to 30 of about 2,111,128 (267)
Quantum sensing for gravity cartography
Nature, 2022 The sensing of gravity has emerged as a tool in geophysics applications such as engineering and climate research1–3, including the monitoring of temporal variations in aquifers4 and geodesy5.
B. Stray +22 more
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Quantum Gravity: A Fluctuating Point of View [PDF]
Frontiers of Physics, 2020 In this contribution, we discuss the asymptotic safety scenario for quantum gravity with a functional renormalization group approach that disentangles dynamical metric fluctuations from the background metric.
J. Pawlowski, M. Reichert
semanticscholar +1 more source
Realization of a complete Stern-Gerlach interferometer: Toward a test of quantum gravity [PDF]
Science Advances, 2020 A full-loop Stern-Gerlach atom interferometer is realized, opening perspectives to examine the quantum nature of gravity. The Stern-Gerlach effect, found a century ago, has become a paradigm of quantum mechanics.
Y. Margalit +10 more
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An experiment for observing quantum gravity phenomena using twin table-top 3D interferometers [PDF]
Classical and quantum gravity, 2020 Theories of quantum gravity based on the holographic principle predict the existence of quantum fluctuations of distance measurements that accumulate and exhibit correlations over macroscopic distances.
Sander M. Vermeulen +6 more
semanticscholar +1 more source
AN INTRODUCTION TO QUANTUM GRAVITY [PDF]
International Journal of Geometric Methods in Modern Physics, 2008 After an overview of the physical motivations for studying quantum gravity, we reprint THE FORMAL STRUCTURE OF QUANTUM GRAVITY, i.e. the 1978 Cargèse Lectures in Levy & Deser (1979): Recent Developments in Gravitation pp. 275–322 by Professor B. S. DeWitt, with kind permission of Springer Science and Business Media.
DE WITT B.S, ESPOSITO G
openaire +6 more sources
International Journal of Modern Physics D, 2017 The search for a theory of quantum gravity is the most fundamental problem in all of theoretical physics, but there are as yet no experimental results at all to guide this endeavor. What seems to be needed is a pragmatic way to test if gravitation really occurs between quantum objects or not.
Hansson, Johan, Francois, Stephane
openaire +6 more sources
Stochastic gravitational-wave background in quantum gravity [PDF]
Journal of Cosmology and Astroparticle Physics, 2020 Among all cosmological quantum-gravity or quantum-gravity-inspired scenarios, only very few predict a blue-tilted primordial tensor spectrum. We explore five of them and check whether they can generate a stochastic gravitational-wave background ...
G. Calcagni, S. Kuroyanagi
semanticscholar +1 more source
Quantum channels in quantum gravity [PDF]
International Journal of Modern Physics D, 2014 The black hole final state proposal implements manifest unitarity in the process of black hole formation and evaporation in quantum gravity, by postulating a unique final state boundary condition at the singularity. We argue that this proposal can be embedded in the gauge/gravity context by invoking a path integral formalism inspired by the Schwinger ...
Rangamani, Mukund, Rota, Massimilliano
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Quantum Gravity at the Corner [PDF]
Universe, 2018 We investigate the quantum geometry of a 2d surface S bounding the Cauchy slices of a 4d gravitational system. We investigate in detail for the first time the boundary symplectic current that naturally arises in the first-order formulation of general relativity in terms of the Ashtekar–Barbero connection.
Freidel, Laurent, Perez, Alejandro
openaire +5 more sources
Complementarity-Entanglement Tradeoff in Quantum Gravity [PDF]
Phys. Rev. D 105, 086024 (2022), 2022 Quantization of the gravity remains one of the most important, yet extremely illusive, challenges at the heart of modern physics. Any attempt to resolve this long-standing problem seems to be doomed, as the route to any direct empirical evidence (i.e., detecting gravitons) for shedding light on the quantum aspect of the gravity is far beyond the ...
arxiv +1 more source