Results 81 to 90 of about 66,341 (212)
The Immirzi parameter in quantum general relativity
, 1997 Barbero has generalized the Ashtekar canonical transformation to a one-parameter scale transformation $U(\iota)$ on the phase space of general relativity.
Rovelli, Carlo, Thiemann, Thomas
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Relational Observables in Gravity: a Review
Symmetry, Integrability and Geometry: Methods and Applications, 2012 We present an overview on relational observables in gravity mainly from a loop quantum gravity perspective. The gauge group of general relativity is the diffeomorphism group of the underlying manifold.
Johannes Tambornino
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The Holst spin foam model via cubulations
New Journal of Physics, 2012 Spin foam models are an attempt at a covariant or path integral formulation of canonical loop quantum gravity. The construction of such models usually relies on the Plebanski formulation of general relativity as a constrained BF theory and is based on ...
Aristide Baratin +2 more
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Symmetric configurations highlighted by collective quantum coherence
European Physical Journal C: Particles and Fields, 2017 Recent developments in quantum gravity have shown the Lorentzian treatment to be a fruitful approach towards the emergence of macroscopic space-times. In this paper, we discuss another related aspect of the Lorentzian treatment: we argue that collective ...
Dennis Obster, Naoki Sasakura
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Causal Loop Quantum Gravity and Cosmological Solutions
, 2004 We shall present here the causal interpretation of canonical quantum gravity in terms of new variables. Then we shall apply it to the minisuperspace of cosmology.
A Shojai +16 more
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Symplectic Structure of Intrinsic Time Gravity
Universe, 2016 The Poisson structure of intrinsic time gravity is analysed. With the starting point comprising a unimodular three-metric with traceless momentum, a trace-induced anomaly results upon quantization.
Eyo Eyo Ita, Amos S. Kubeka
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Relating spin-foam to canonical loop quantum gravity by graphical calculus [PDF]
, 2021 Jinsong Yang, Cong Zhang, Yongge Ma
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Relational Lorentzian Asymptotically Safe Quantum Gravity: Showcase Model
UniverseIn a recent contribution, we identified possible points of contact between the asymptotically safe and canonical approaches to quantum gravity. The idea is to start from the reduced phase space (often called relational) formulation of canonical quantum ...
Renata Ferrero, Thomas Thiemann
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Grand-canonical simulation of 4D simplicial quantum gravity [PDF]
, 2003 S. Horata, H.S. Egawa, T. Yukawa
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Tunnelling to holographic traversable wormholes
SciPost PhysicsWe study nonperturbative effects of quantum gravity in a system consisting of a coupled pair of holographic CFTs. The AdS$_4$/CFT$_3$ system has three possible ground states: two copies of empty AdS, a pair of extremal AdS black holes, and an eternal AdS
Suzanne Bintanja, Ben Freivogel, Andrew Rolph
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