Εμφανίζονται 1 - 20 Αποτελέσματα από 1.885 για την αναζήτηση 'AutoParallel', χρόνος αναζήτησης: 0,97δλ Περιορισμός αποτελεσμάτων
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    Συγγραφείς: Obukhov, Yuri N., Puetzfeld, Dirk

    Πηγή: Phys. Rev. D 104, 044031 (2021)

    Θεματικοί όροι: General Relativity and Quantum Cosmology

    Σύνδεσμος πρόσβασης: http://arxiv.org/abs/2105.08428

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    Academic Journal

    Συγγραφείς: Luis Acedo

    Συνεισφορές: Repositorio Institucional de la Universitat Politècnica de València Riunet

    Πηγή: RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
    instname
    Universitat Politècnica de València (UPV)
    Universe, Vol 1, Iss 3, Pp 422-445 (2015)
    Universe
    Volume 1
    Issue 3
    Pages: 422-445

    Περιγραφή αρχείου: application/pdf

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    Academic Journal
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    Academic Journal

    Συνεισφορές: Clauss, Philippe, Universitat Politècnica de Catalunya. Doctorat en Arquitectura de Computadors, Universitat Politècnica de Catalunya. Doctorat en Bioinformàtica, Universitat Politècnica de Catalunya. Departament d'Arquitectura de Computadors, Barcelona Supercomputing Center, Universitat Politècnica de Catalunya. CAP - Grup de Computació d'Altes Prestacions

    Πηγή: UPCommons. Portal del coneixement obert de la UPC
    Universitat Politècnica de Catalunya (UPC)

    Περιγραφή αρχείου: application/pdf

    Συνδεδεμένο Πλήρες Κείμενο
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    Mixed Materials

    Additional Titles: We investigate the polarization modes of gravitational waves in $f(Q)$ non-metric gravity without gauge fixing. The main result of this study is that no further scalar mode appears more than the two standard plus and cross transverse polarizations of massless tensor gravitational radiation, typical of General Relativity. This is because the first-order perturbation of connection does not modify the linearized field equations in vacuum which remain gauge invariant. Then, the world line equations of free point particles, as well as the equations of their deviations, are obtained using only the symmetric teleparallel connection. In $f(Q)$ gravity, test masses follow timelike geodesics and not autoparallel curves. In the proper reference frame, thanks to the geodesic deviation equation of the structure-less bodies in free fall, we prove that, in any gauge, only the metric perturbations $h_{μν}$, related to tensor modes, survive by exploiting the gauge invariance. Besides, scalar modes disappear. This allows us to conclude that only two degrees of freedom of linearized $f(Q)$ non-metric gravity propagate as in General Relativity and in $f(T)$ teleparallel gravity. The situation is different with respect to $f(R)$ gravity (with $f(R)\neq R$) where a further scalar mode is found.

    Σύνδεσμος: http://arxiv.org/abs/2405.16163

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    Academic Journal

    Συγγραφείς: Di Scala, Antonio J.

    Πηγή: Tsukuba Journal of Mathematics, 2003 Jun 01. 27(1), 99-102.

    Σύνδεσμος πρόσβασης: https://www.jstor.org/stable/43686301

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    Dissertation/ Thesis

    Συνεισφορές: University/Department: Universitat Politècnica de Catalunya. Departament d'Arquitectura de Computadors

    Thesis Advisors: Badia Sala, Rosa M. (Rosa Maria), Ejarque Artigas, Jorge

    Πηγή: TDX (Tesis Doctorals en Xarxa)

    Περιγραφή αρχείου: application/pdf

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    Συγγραφείς: Adak, Muzaffer, Pala, Caglar

    Πηγή: Journal of Physics: Conference Series 2191 (2022) 012017

    Σύνδεσμος πρόσβασης: http://arxiv.org/abs/1102.1878

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