# Classical Spacetime From Quantum Gravity

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### Hilbert space structure in quantum gravity: an algebraic perspective

than the program of starting with a classical description of spacetime, via general relativity, and attempting to quantize it. Plausibly quantum mechanics plays a

### Covariant Loop Quantum Gravity

the conclusion is correct, and characterizes the physics of quantum spacetime. In Bronstein's words: Without a deep revision of classical notions it seems.

### An Introduction to Quantum Gravity - Encyclopedia of Life

oleh G Esposito Dirujuk 25 kali Classical and Quantum Foundations. 2.1. Lorentzian Spacetime and Gravity. 2.2. From Schrödinger to Feynman. 2.3. Spacetime Singularities.

### Time and Evolution in Quantum and Classical - MDPI

oleh AY Kamenshchik 2021 The problem of disappearance of time in quantum gravity and four-dimensional spacetime contain the second time derivatives: four of

### Relativity and Quantum Field Theory

oleh J Bain Dirujuk 3 kali and NQFTs also suggest that routes to quantum gravity are more varied than is typ- between Minkowski spacetime and classical spacetimes.

### Loop Quantum Gravity : An Overview - World Scientific

that of general relativity and quantum mechanics, although both provided guiding rise to a quantum extension of classical spacetimes, creating new

### Space and Time in Loop Quantum Gravity - Archive ouverte HAL

oleh C Rovelli 2018 Dirujuk 12 kali In quantum gravity, Minkowski spacetime and hence Newtonian space appear only as an the role of time in classical or quantum mechanics,.

### Does time exist in quantum gravity? - CEJSH

oleh C Kiefer 2015 Dirujuk 15 kali quantum gravity leads therefore to a problem of time In my es- space is analogous to q, and the classical spacetime corresponds to q(t).

### From Classical Theory to Quantum Gravity - MPG.PuRe

oleh BF Schutz 2009 Dirujuk 1 kali tests of quantum gravity. However, if it replaces continuum spacetime with a fundamentally different structure, then Lorentz invariance

### Some Remarks on the Semi-Classical Limit of Quantum Gravity

oleh ER Livine 2005 Dirujuk 2 kali define for we mean by a semi-classical theory of quantum gravity, then we would how the non-commutative spacetime of deformed special relativity is the

### Classical and Quantum Gravity - IOPscience

There has never been a better time to publish in Classical and Quantum Gravity the subjects of gravitational physics and the theory of spacetime.

### Introduction to Quantum Effects in Gravity (PDF) - University of

transformations; particle creation by classical backgrounds; quantum scalar fields in the de Sitter spacetime and growth of fluctuations; the Unruh effect;

### Levels of spacetime emergence in quantum gravity - CORE

oleh D Oriti Dirujuk 19 kali of quantum gravity resulting from quantizing a classical theory of geometry and gravity (e.g General Relativity) [2 4], the other in which spacetime, 20 halaman

### Quantum Gravity - University of Helsinki

Chief problem: spacetime must be an emergent quantity, too! Page 9. 4. Einstein classical gravity, black hole solution v escape.

### Quantum Gravity : Has Spacetime Quantum Properties ? 1

oleh R Hedrich 2009 Dirujuk 4 kali the gravitational field, as well as spacetime, should have quantum properties. What, if gravity is instead an intrinsically classical phenomenon?

### Quantum Mechanics of Gravitational Collapse - Project Euclid

oleh P Håjíček 1992 Dirujuk 45 kali 2 and 3, we study the classical Hamiltonian and the corresponding dynamics of the shell and spacetime. The Hamiltonian is not bounded from below; the solutions

### Problem of time in quantum gravity - Wiley Online Library

oleh E Anderson 2012 Dirujuk 243 kali or Spacetime Reconstruction Problems. These are all ensured by the nature of the Dirac algebroid. From. (8 10), closure is clear. In classical

### Quantum cosmology in the light of quantum mechanics

30 Jan 2019 3 Classical analogy: the geometric minisuperspace. 7. 4 Quantum picture. 10. 4.1 Quantum field theory in the spacetime

### Quantum Gravity - Springer

theorems that spacetime singularities are unavoidable in general ory of quantum gravity is needed since the semi-classical approximation leading.

### Fact and Folklore in Quantum Gravity - JSTOR

oleh C Wüthrich 2005 Dirujuk 77 kali can be coupled to the classical spacetime geometry via the classical quantity Semi-classical quantum theories of gravity may or may. AwFT FwS.

### QUANTUM GRAVITY

functions of spacetime coordinates which are weighed in the functional integral with solutions nor quantum fluctuations near the classical solutions.

### The Self-Organizing QUANTUM UNIVERSE - JSTOR

oleh J Ambjørn 2008 Dirujuk 62 kali gravity aims to describe the nature of space time. KEY CONCEPTS n Quantum theory and as the state of a classical object can be described.

### The Philosophy behind Quantum Gravity

oleh H ZINKERNAGEL 2006 Dirujuk 16 kali (and thus a classical description of gravity) with quantum theory. tort the curvature of spacetime and the curvature of spacetime

### Macroscopic Quantum Mechanics in a Classical Spacetime

oleh H Yang 2013 Dirujuk 107 kali Macroscopic Quantum Mechanics in a Classical Spacetime. Huan Yang,1 Haixing Miao,1 Da-Shin Lee,2 standard formulation of linearized quantum gravity [1],.

### General Relativity Histories Theory - SciELO

oleh N Savvidou 2005 Dirujuk 21 kali preserving the classical Dirac algebra of constraints. ii) then, one has to find the zero spacetime focussed, approach to quantum gravity that is char-.

### Lessons from Classical Gravity about the Quantum structure of

oleh T Padmanabhan Dirujuk 100 kali THINK BEYOND EINSTEIN FIELD EQUATIONS. LOOK FOR INTERNAL EVIDENCE IN CLASSICAL. GRAVITY ABOUT QUANTUM STRUCTURE OF. SPACETIME.

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oleh M Bojowald 2010 Dirujuk 1 kali loop quantum gravity, based on symmetric (sometimes exactly solvable) model systems corrections to the classical equations in low-energy regimes,

### The Quantum Spacetime 1 Opening 2 Classical spacetime

oleh J Maldacena Dirujuk 2 kali give a (somewhat biased) overview of quantum gravity, from generalities to more current developments in string theory. 2. Classical spacetime dynamics.

### download paper - PROCEEDINGS OF SPIE

Indeed, what if quantum mechanics had preceded classical mechanics and the unified physics, in which quasi-classical spacetime might emerge at low (i.e.

### A CAUTIOUS ONTOLOGY OF SPACETIME IN QUANTUM

oleh S Lorenz 2006 Dirujuk 2 kali gravity's research programs throughout its short history include the semi-classical theory, string theory, and canonical quantum gravity.

### Which quantum states are dual to classical spacetimes? arXiv

oleh M Botta-Cantcheff 2017 Dirujuk 4 kali The AdS/CFT correspondence represents the paradigmatic case of gravity/gauge duality where spacetime with fixed (AdS) asymptotics can be defined

### QUANTUM GRAVITY EFFECTS IN SCALAR, VECTOR AND

can look for evidence of quantum gravity that is detectable in astrophysics. 3 Canonical Quantum Gravity and The Semi-classical Correction.

### Classical and quantum physics mix - Nature

oleh J Maddox 1995 Dirujuk 21 kali not avoid the need for a quantum theory of gravity; but that would be a huge extra. MIXING together classical mechanics and quantum mechanics is a

### The emergence of spacetime in quantum theories of gravity

oleh N Huggett Dirujuk 18 kali The problem of unifying quantum mechanics with general relativity in a theory of gravity is an emergent classical spacetime metrical geometry. But.6 halaman

### Loop quantum gravity

oleh A Perez Dirujuk 5 kali ical treatment of spacetime geometry, are appropriately taken into account. physics (either classical or quantum) as long as gravity is neglected.

### Quantum time uncertainty in Schwarzschild anti-de Sitter

oleh P Galán 2007 corrections to the classical spacetime geometry. From the nonperturbative point of view, both gravity and quantum mechanics are treated on

### Aspects of loop quantum gravity - Imperial College London

oleh A Nagen 2020 In GR, gravity arises as a property of spacetime. However,. GR is a classical theory and, hence, cannot be a candidate for quantum gravity.

### THE ATOMS OF SPACE-TIME

with the aim to proposing an alternative quantum theory of gravity The idea is to start from a non-commutative classical spacetime.36 halaman

### Concept of Time in Canonical Quantum Gravity and - CERN

oleh C Kiefer 2009 Dirujuk 12 kali in classical mechanics, which allows the construction of a particle trajectory. In this sense, the classical spacetime can be interpreted as a.

### Gravity and the Quantum Abstract - Penn State University

oleh A Ashtekar Dirujuk 144 kali general relativity and quantum mechanics must unavoidably meet. in the classical theory several manifestations of these difficulties.

### Can Spacetime be a Condensate?

oleh BL Hu 2005 Dirujuk 103 kali A. Classical, semiclassical, stochastic and quantum Gravity gravity [9] refers to the theory where classical spacetime is driven by

### On the Study of Quantum Properties of Space-Time - ICTP

phenomenon of gravity waves. In experiments searching for classical grav- ity waves the presence of quantum space-time fluctuations would introduce a.

### Entanglement of quantum clocks through gravity - PNAS

oleh EC Ruiz 2017 Dirujuk 43 kali quantum clocks entanglement gravity classical limit. Acrucial aspect of any physical theory is to describe the behav-.

### Spacetime quantization induced by classical gravity

oleh S Doplicher 1994 Dirujuk 878 kali classical gravity. Quantum spacetime is described by a non-commutative algebra whose commutation relations do imply our.

### QUANTUM GRAVITY AND THE FUNCTIONALRE

of spacetime within the realm of quantum field theory, O. Babelon, D. Bernard and M. Talon Introduction to Classical Integrable Systems†.

### Lessons from classical gravity about the quantum structure of

oleh T Padmanabhan 2011 Dirujuk 100 kali D - 1 of a D dimensional spacetime. 5th International Workshop DICE2010. IOP Publishing. Journal of Physics: Conference Series 306 (2011) 012001 doi:10.1088 19 halaman

### Binding Quantum Matter and Space-Time, Without Romanticism

oleh A Tilloy 2018 Dirujuk 9 kali Keywords Quantum gravity Semiclassical theories Collapse models as representatives of all hybrid quantum-classical theories.

### Newtonian Quantum Gravity*

oleh KRW Jones 1995 Dirujuk 62 kali We develop a nonlinear quantum theory of Newtonian gravity consistent The argument hinges upon exploiting the verified classical conservation laws to.

### The emergence of spacetime in quantum theories of gravity

oleh N Huggett 2013 Dirujuk 18 kali One family of approaches to quantum gravity, the 'canonical' theories, takes classical general relativity as its point of departure and attempts to quantize the 6 halaman

### Philippe Allard Alessio Belenchia Caslav Brukner Esteban

entropy, related to completely classical components of the Wightman In quantum gravity, information about the spacetime distribution of energy.