Realization of a complete Stern-Gerlach interferometer: Toward a test of quantum gravity. [PDF]
Sci Adv, 2021 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.
Margalit Y +10 more
europepmc +3 more sources
Spin Entanglement Witness for Quantum Gravity [PDF]
Physical Review Letters, 2017 Understanding gravity in the framework of quantum mechanics is one of the great challenges in modern physics. However, the lack of empirical evidence has lead to a debate on whether gravity is a quantum entity.
Marko Toros +2 more
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Gravitationally Induced Entanglement between Two Massive Particles is Sufficient Evidence of Quantum Effects in Gravity [PDF]
Physical Review Letters, 2017 All existing quantum-gravity proposals are extremely hard to test in practice. Quantum effects in the gravitational field are exceptionally small, unlike those in the electromagnetic field.
Chiara Marletto, Vlatko Vedral
exaly +2 more sources
Quantum gravity phenomenology at the dawn of the multi-messenger era—A review [PDF]
Progress in Particle and Nuclear Physics, 2021 The exploration of the universe has recently entered a new era thanks to the multi-messenger paradigm, characterized by a continuous increase in the quantity and quality of experimental data that is obtained by the detection of the various cosmic ...
A. Addazi +159 more
semanticscholar +1 more source
A background-independent algebra in quantum gravity [PDF]
Journal of High Energy Physics, 2023 We propose an algebra of operators along an observer’s worldline as a background-independent algebra in quantum gravity. In that context, it is natural to think of the Hartle-Hawking no boundary state as a universal state of maximum entropy, and to ...
E. Witten
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White paper and roadmap for quantum gravity phenomenology in the multi-messenger era [PDF]
Classical and quantum gravity, 2023 The unification of quantum mechanics and general relativity has long been elusive. Only recently have empirical predictions of various possible theories of quantum gravity been put to test, where a clear signal of quantum properties of gravity is still ...
R. A. Batista +102 more
semanticscholar +1 more source
A short review of loop quantum gravity [PDF]
Reports on progress in physics. Physical Society, 2021 An outstanding open issue in our quest for physics beyond Einstein is the unification of general relativity (GR) and quantum physics. Loop quantum gravity (LQG) is a leading approach toward this goal.
A. Ashtekar, Eugenio Bianchi
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Locally Mediated Entanglement in Linearized Quantum Gravity. [PDF]
Physical Review Letters, 2022 The current interest in laboratory detection of entanglement mediated by gravity was sparked by an information-theoretic argument: entanglement mediated by a local field certifies that the field is not classical.
Marios Christodoulou +5 more
semanticscholar +1 more source
Massive quantum systems as interfaces of quantum mechanics and gravity [PDF]
Reviews of Modern Physics, 2023 The traditional view from particle physics is that quantum gravity effects should only become detectable at extremely high energies and small length scales.
S. Bose +9 more
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What gravity mediated entanglement can really tell us about quantum gravity [PDF]
Physical Review D, 2022 We revisit the Bose-Marletto-Vedral (BMV) table-top experimental proposal - which aims to witness quantum gravity using gravity mediated entanglement - analyzing the role of locality in the experiment.
Eduardo Mart'in-Mart'inez, T. R. Perche
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