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An invitation to loop quantum gravity [PDF]
, 2004 We describe the basic assumptions and key results of loop quantum gravity, which is a background independent approach to quantum gravity. The emphasis is on the basic physical principles and how one deduces predictions from them, at a level suitable for ...
Lee Smolin
semanticscholar +1 more source
Fermions in quantum gravity [PDF]
Physical Review Letters, 1994 We study the quantum fermions+gravity system, that is, the gravitational counterpart of QED. We start from the standard Einstein-Weyl theory, reformulated in terms of Ashtekar variables; and we construct its non- perturbative quantum theory by extending the loop representation of general relativity.
Carlo Rovelli, Hugo A. Morales-Técotl
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Dilaton Gravity with a Non-minmally Coupled Scalar Field [PDF]
, 2000 We discuss the two-dimensional dilaton gravity with a scalar field as the source matter. The coupling between the gravity and the scalar, massless, field is presented in an unusual form.
Callan C. G. +6 more
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Periodic Modification of the Boerdijk–Coxeter Helix (tetrahelix)
Mathematics, 2019 The Boerdijk−Coxeter helix is a helical structure of tetrahedra which possesses no non-trivial translational or rotational symmetries. In this document, we develop a procedure by which this structure is modified to obtain both translational and ...
Garrett Sadler +3 more
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New Journal of Physics, 2005 The goal of this article is to present a broad perspective on quantum gravity for \emph{non-experts}. After a historical introduction, key physical problems of quantum gravity are illustrated. While there are a number of interesting and insightful approaches to address these issues, over the past two decades sustained progress has primarily occurred in
openaire +4 more sources
Nuclear Physics B, 2020 We define a three-dimensional quantum theory of gravity as the holographic dual of the Liouville conformal field theory. The theory is consistent and unitary by definition. The corresponding theory of gravity with negative cosmological constant has peculiar properties. The quantum theory has no normalisable AdS3 vacuum. The model contains primary black
Li, Songyuan +2 more
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Differential Geometrical Formulation of Gauge Theory of Gravity [PDF]
, 2002 Differential geometric formulation of quantum gauge theory of gravity is studied in this paper. The quantum gauge theory of gravity which is proposed in the references hep-th/0109145 and hep-th/0112062 is formulated completely in the framework of ...
Wu, Ning, Xu, Zhan, Zhang, Da-Hua
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Non-Local Game of Life in 2D Quasicrystals
Crystals, 2018 On a two-dimensional quasicrystal, a Penrose tiling, we simulate for the first time a game of life dynamics governed by non-local rules. Quasicrystals have inherently non-local order since any local patch, the emperor, forces the existence of a large ...
Fang Fang +3 more
doaj +1 more source
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.
S. Bose +9 more
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Signatures of the quantum nature of gravity in the differential motion of two masses [PDF]
Quantum Science and Technology, 2021 We show that a signature of the quantum nature of gravity is the quantum mechanical squeezing of the differential motion of two identical masses with respect to their common mode.
A. Datta, H. Miao
semanticscholar +1 more source