Search Results - "quantum gravity"

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    State sum models for quantum gravity by Barrett, John W.

    Published 2000
    “…This paper reviews the construction of quantum field theory on a 4-dimensional spacetime by combinatorial methods, and discusses the recent developments in the direction of a combinatorial construction of quantum gravity.…”
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    Unruh-DeWitt detector response across a Rindler firewall is finite by Louko, Jorma

    Published 2014
    Subjects: “…Models of Quantum Gravity…”
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    Topological state sum models in four dimensions, half-twists and their applications by Bärenz, Manuel

    Published 2017
    Subjects: “…Topological quantum field theory ; state sum models ; quantum gravity ; category theory…”
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    Integrability for Relativistic Spin Networks by Barrett, John W., Baez, John C.

    Published 2001
    “…The evaluation of relativistic spin networks plays a fundamental role in the Barrett-Crane state sum model of Lorentzian quantum gravity in 4 dimensions. A relativistic spin network is a graph labelled by unitary irreducible representations of the Lorentz group appearing in the direct integral decomposition of the space of L^2 functions on three-dimensional hyperbolic space. …”
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    Cosmological evolution as squeezing: a toy model for group field cosmology by Adjei, Eugene, Gielen, Steffen, Wieland, Wolfgang

    Published 2018
    “…We present a simple model of quantum cosmology based on the group field theory (GFT) approach to quantum gravity. The model is formulated on a subspace of the GFT Fock space for the quanta of geometry, with a fixed volume per quantum. …”
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    New perspectives in gravity beyond General Relativity: from fundamental physics to strongly gravitating systems by Coates, Andrew

    Published 2018
    “…In this thesis we will focus on two interesting depatures from GR inspired by quantum gravity: violations of Lorentz symmetry and the weak equivalence principle. …”
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    Novel exploitation of cold atom experimental techniques for the development of Quantum Technologies by Johnson, David

    Published 2024
    “…Cold atom systems are already used in a variety of fields including developing quantum computers, high precision sensors such as magnetometers and gravimeters, tests of fundamental physics in luding detecting dark matter and tests of quantum gravity and many, many more. The aim of this thesis is to demonstrate over the course five different projects the techniques needed to improve the applications of cold atom systems. …”
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    A Lorentzian Signature Model for Quantum General Relativity by Barrett, John W., Crane, Louis

    Published 2000
    “…We give a relativistic spin network model for quantum gravity based on the Lorentz group and its q-deformation, the Quantum Lorentz Algebra. …”
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