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We show that a recent proposal for the quantization of gravity based on discrete space-time implies a modification of standard quantum mechanics that naturally leads to a loss of coherence in quantum states of the type discussed by Milburn.…

广义相对论与量子宇宙学 · 物理学 2014-11-17 Rodolfo Gambini , Rafael Porto , Jorge Pullin

Witnessing non-classicality in the gravitational field has been claimed to be practically impossible. This constitutes a deep problem, which has even lead some researchers to question whether gravity should be quantised, due to the weakness…

量子物理 · 物理学 2017-04-04 Chiara Marletto , Vlatko Vedral

There is significant interest in potential experimental tests of macroscopic quantum effects, both to test potential modifications to quantum theory and to probe the quantum nature of gravity. A proposed platform with which to generate the…

量子物理 · 物理学 2021-10-28 Benjamin D. Wood , Gavin W. Morley

A pilot experiment suitable to test Newton's law of gravity down to the regime of acceleration typical of galaxies has been carried out in Omega Centauri. Stars in the extreme periphery of this globular cluster are used as test particles…

天体物理学 · 物理学 2007-05-23 Riccardo Scarpa , Gianni Marconi , Roberto Gilmozzi

In compact astrophysical objects, the neutrino density can be so high that neutrino-neutrino refraction can lead to fast flavor conversion of the kind $\nu_e \bar\nu_e \leftrightarrow \nu_x \bar\nu_x$ with $x=\mu,\tau$, depending on the…

高能物理 - 唯象学 · 物理学 2022-11-24 Ian Padilla-Gay , Irene Tamborra , Georg G. Raffelt

The Novello-DeLorenci-Luciane (NDL) field theory of gravitation predicts that gravitational waves (GWs) follow geodesics of a modified (effective) geometry with a speed lower than the velocity of light. The theory also demonstrates that GWs…

天体物理学 · 物理学 2007-05-23 Herman J. Mosquera Cuesta

We show that, in the relativistic limit, the quantum theory of neutrino oscillations can be described through the theory of weak measurements with pre and post-selection. The weak nature of neutrino detection allows simultaneous…

量子物理 · 物理学 2022-05-26 Yago P. Porto-Silva , Marcos C. de Oliveira

We propose an experiment to test the effects of gravity and acceleration on quantum entanglement in space-based setups. We show that the entanglement between excitations of two Bose-Einstein condensates is degraded after one of them…

The quantum-reduced loop-gravity technique has been introduced for dealing with cosmological models. We show that it can be applied rather generically: anytime the spatial metric can be gauge-fixed to a diagonal form. The technique selects…

广义相对论与量子宇宙学 · 物理学 2013-11-13 Emanuele Alesci , Francesco Cianfrani , Carlo Rovelli

We use astrophysical data to shed light on fundamental physics by constraining parametrized theoretical cosmological and gravitational models. Gravitational parameters are those constants that parametrize possible departures from Einstein's…

天体物理学 · 物理学 2008-08-18 Yi Mao

Extreme-mass-ratio-inspiral observations from future space-based gravitational-wave detectors such as LISA will enable strong-field tests of general relativity with unprecedented precision, but at prohibitive computational cost if existing…

We study quantum noise and decoherence induced by gravitons. We derive a Langevin equation of geodesic deviation in the presence of gravitons. The amplitude of noise correlations tells us that large squeezing is necessary to detect the…

高能物理 - 理论 · 物理学 2021-02-17 Sugumi Kanno , Jiro Soda , Junsei Tokuda

After two decades of measurements, neutrino physics is now advancing into the precision era. Withthe long-baseline experiments designed to tackle current open questions, a new query arises: can atmospheric neutrino experiments also play a…

高能物理 - 唯象学 · 物理学 2024-01-22 C. A. Argüelles , P. Fernández , I. Martínez-Soler , M. Jin

The debate on gravity theories to extend or modify General Relativity is very active today because of the issues related to ultra-violet and infra-red behavior of Einstein's theory. In the first case, we have to address the Quantum Gravity…

The accelerating expansion of the Universe poses a major challenge to our understanding of fundamental physics. One promising avenue is to modify general relativity and obtain a new description of the gravitational force. Because…

广义相对论与量子宇宙学 · 物理学 2015-08-28 Adam R. Solomon

The cosmological principle asserts that the Universe is homogeneous and isotropic on large enough scales. However, alternative cosmological models can bring about anisotropies through local inhomogeneities, anisotropic evolution, or exotic…

We systematically investigate the effects of quantum gravity on the ground-state properties of dilute homogeneous dipolar Bose gases using the Hartree-Fock-Bogoliubov theory based on the generalized uncertainty principle. We calculate…

广义相对论与量子宇宙学 · 物理学 2025-02-03 Asma Tahar Taiba , Abdelaali Boudjemaa

It is commonly anticipated that gravity is subject to the standard principles of quantum mechanics. Yet some (including Einstein) have questioned that presumption, whose empirical basis is weak. Indeed, recently Freeman Dyson has emphasized…

广义相对论与量子宇宙学 · 物理学 2015-06-19 Lawrence M. Krauss , Frank Wilczek

Proposed experiments for obtaining empirical evidence for a quantum description of gravity in a table-top setting focus on detecting quantum information signatures, such as entanglement or non-Gaussianity production, in gravitationally…

量子物理 · 物理学 2025-12-19 Thomas Strasser , Marios Christodoulou , Richard Howl , Caslav Brukner

The local supercluster acts as a gravity deflection source for cosmic background neutrinos. This deflection by gravity changes the neutrino helicity and therefore has important consequences for ground based tritium capture experiments aimed…

宇宙学与河外天体物理 · 物理学 2023-01-31 Beatriz Hernández-Molinero , Carmelita Carbone , Raul Jimenez , Carlos Peña Garay