scholarly journals Possible effects of quantum mechanics violation induced by certain quantum-gravity effects on neutrino oscillations

1999 ◽  
Vol 60 (3) ◽  
Author(s):  
Chao-Hsi Chang ◽  
Wu-Sheng Dai ◽  
Xue-Qian Li ◽  
Yong Liu ◽  
Feng-Cai Ma ◽  
...  
Keyword(s):  
Quantum Mechanics ◽  
Quantum Gravity ◽  
Neutrino Oscillations ◽  
Gravity Effects

scholarly journals Exploration of possible quantum gravity effects with neutrinos I: Decoherence in neutrino oscillations experiments

2009 ◽  
Vol 171 ◽  
pp. 012038 ◽  
Author(s):  
Alexander Sakharov ◽  
Nick Mavromatos ◽  
Anselmo Meregaglia ◽  
André Rubbia ◽  
Sarben Sarkar
Keyword(s):  
Quantum Gravity ◽  
Neutrino Oscillations ◽  
Gravity Effects

scholarly journals LARGE QUANTUM GRAVITY EFFECTS: CYLINDRICAL WAVES IN FOUR DIMENSIONS

2000 ◽  
Vol 09 (06) ◽  
pp. 669-686 ◽  
Author(s):  
MARÍA E. ANGULO ◽  
GUILLERMO A. MENA MARUGÁN
Keyword(s):  
Quantum Gravity ◽  
Symmetry Axis ◽  
Point Of View ◽  
Three Dimensions ◽  
Asymptotic Region ◽  
Four Dimensions ◽  
Cylindrical Waves ◽  
Significant Difference ◽  
Gravity Effects ◽  
Linearly Polarized

Linearly polarized cylindrical waves in four-dimensional vacuum gravity are mathematically equivalent to rotationally symmetric gravity coupled to a Maxwell (or Klein–Gordon) field in three dimensions. The quantization of this latter system was performed by Ashtekar and Pierri in a recent work. Employing that quantization, we obtain here a complete quantum theory which describes the four-dimensional geometry of the Einstein–Rosen waves. In particular, we construct regularized operators to represent the metric. It is shown that the results achieved by Ashtekar about the existence of important quantum gravity effects in the Einstein–Maxwell system at large distances from the symmetry axis continue to be valid from a four-dimensional point of view. The only significant difference is that, in order to admit an approximate classical description in the asymptotic region, states that are coherent in the Maxwell field need not contain a large number of photons anymore. We also analyze the metric fluctuations on the symmetry axis and argue that they are generally relevant for all of the coherent states.

scholarly journals Quantum gravity, shadow states and quantum mechanics

2003 ◽  
Vol 20 (6) ◽  
pp. 1031-1061 ◽  
Author(s):  
Abhay Ashtekar ◽  
Stephen Fairhurst ◽  
Joshua L Willis
Keyword(s):  
Quantum Mechanics ◽  
Quantum Gravity

scholarly journals Quantum-gravity effects for excited states of inflationary perturbations

2019 ◽  
Vol 99 (10) ◽  
Author(s):  
David Brizuela ◽  
Claus Kiefer ◽  
Manuel Krämer ◽  
Salvador Robles-Pérez
Keyword(s):  
Quantum Gravity ◽  
Excited States ◽  
Gravity Effects

scholarly journals Quantum Gravity Phenomenology from the Thermodynamics of Spacetime

Universe ◽  
2022 ◽  
Vol 8 (1) ◽  
pp. 50
Author(s):  
Ana Alonso-Serrano ◽  
Marek Liška
Keyword(s):  
Quantum Gravity ◽  
Big Bang ◽  
Einstein Equations ◽  
Logarithmic Term ◽  
Quantum Gravity Phenomenology ◽  
Gravity Effects ◽  
Energy Quantum ◽  
The Big Bang ◽  
Big Bang Singularity ◽  
Modified Dynamics

This work is based on the formalism developed in the study of the thermodynamics of spacetime used to derive Einstein equations from the proportionality of entropy within an area. When low-energy quantum gravity effects are considered, an extra logarithmic term in the area is added to the entropy expression. Here, we present the derivation of the quantum modified gravitational dynamics from this modified entropy expression and discuss its main features. Furthermore, we outline the application of the modified dynamics to cosmology, suggesting the replacement of the Big Bang singularity with a regular bounce.

scholarly journals Do we Observe Quantum Gravity Effects at Galactic Scales?

2006 ◽  
Vol 20 ◽  
pp. 251-256
Author(s):  
M. Reuter ◽  
H. Weyer
Keyword(s):  
Quantum Gravity ◽  
Gravity Effects

scholarly journals A PROPOSAL TO RESOLVE THE BLACK HOLE INFORMATION PARADOX

2002 ◽  
Vol 11 (10) ◽  
pp. 1537-1540 ◽  
Author(s):  
SAMIR D. MATHUR
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
String Theory ◽  
Quantum Gravity ◽  
Bound State ◽  
Nonlocal Effects ◽  
Information Paradox ◽  
Microscopic Scale ◽  
Gravity Effects ◽  
Black Hole Information

The entropy and information puzzles arising from black holes cannot be resolved if quantum gravity effects remain confined to a microscopic scale. We use concrete computations in nonperturbative string theory to argue for three kinds of nonlocal effects that operate over macroscopic distances. These effects arise when we make a bound state of a large number of branes, and occur at the correct scale to resolve the paradoxes associated with black holes.

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