Results 31 to 40 of about 474,978 (288)
Methods for Calculating Empires in Quasicrystals
Crystals, 2017 This paper reviews the empire problem for quasiperiodic tilings and the existing methods for generating the empires of the vertex configurations in quasicrystals, while introducing a new and more efficient method based on the cut-and-project technique ...
Fang Fang, Dugan Hammock, Klee Irwin
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Journal of High Energy Physics, 2021 In this article, the Cartan geometric approach toward (extended) supergravity in the presence of boundaries will be discussed. In particular, based on new developments in this field, we will derive the Holst variant of the MacDowell-Mansouri action for N
K. Eder, H. Sahlmann
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The Unexpected Fractal Signatures in Fibonacci Chains
Fractal and Fractional, 2019 In this paper, a new fractal signature possessing the cardioid shape in the Mandelbrot set is presented in the Fourier space of a Fibonacci chain with two lengths, L and S, where L / S = ϕ . The corresponding pointwise dimension is 1.7.
Fang Fang, Raymond Aschheim, Klee Irwin
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Contextual extensions of quantum gravity models [PDF]
International Journal of Geometric Methods in Modern Physics Vol.
18, No. 6 (2021) 2150085, 2020 We present a simple way of incorporating the structure of contextual extensions into quantum gravity models. The contextual extensions of $C^*$-algebras, originally proposed for contextual hidden variables, are generalized to the cones indexed by the contexts and their limit in a category. By abstracting the quantum gravity models as functors, we study
arxiv +1 more source
Quantum gravity at the fifth root of unity
Physics Open, 2022 We consider quantum transition amplitudes, partition functions and observables for 3D spin foam models within SU(2)quantum group deformation symmetry, where the deformation parameter is postulated to be a complex fifth root of unity.
Marcelo Amaral +2 more
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Modified gravity from the quantum part of the metric [PDF]
Eur. Phys. J. C (2014) 74:2743, 2013 It is shown that if a metric in quantum gravity can be decomposed as a sum of classical and quantum parts then Einstein quantum gravity looks approximately like modified gravity with a nonminimal interaction between gravity and matter.
arxiv +1 more source
Quasicrystal Tilings in Three Dimensions and Their Empires
Crystals, 2018 The projection method for constructing quasiperiodic tilings from a higher dimensional lattice provides a useful context for computing a quasicrystal’s vertex configurations, frequencies, and empires (forced tiles).
Dugan Hammock, Fang Fang, Klee Irwin
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Beyond the Standard Model with Six-Dimensional Spinors
Particles, 2023 Six-dimensional spinors with Spin(3,3) symmetry are utilized to efficiently encode three generations of matter. E8(−24) is shown to contain physically relevant subgroups with representations for GUT groups, spacetime symmetries, three generations of the ...
David Chester +2 more
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Remarks on fermions in a dipole magnetic field
Journal of High Energy Physics, 2021 This work is a continuation of our recent study of non-relativistic charged particles, confined to a sphere enclosing a magnetic dipole at its center [1]. In this sequel, we extend our computations in two significant ways.
Jeff Murugan +2 more
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Spread complexity and topological transitions in the Kitaev chain
Journal of High Energy Physics, 2023 A number of recent works have argued that quantum complexity, a well-known concept in computer science that has re-emerged recently in the context of the physics of black holes, may be used as an efficient probe of novel phenomena such as quantum chaos ...
Pawel Caputa +5 more
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