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  1. Article ; Online: Time Solutions and Symmetries in Extended Gravity Quantum Cosmology

    Capozziello Salvatore

    EPJ Web of Conferences, Vol 58, p

    2013  Volume 02003

    Abstract: Minisuperspace models are taken into account searching for Noether symmetries. The existence of conserved quantities gives selection rule to recover classical behaviors in cosmic evolution according to the so called Hartle criterion, that allows to ... ...

    Abstract Minisuperspace models are taken into account searching for Noether symmetries. The existence of conserved quantities gives selection rule to recover classical behaviors in cosmic evolution according to the so called Hartle criterion, that allows to select correlated regions in the configuration space of dynamical variables. We show that such a statement works for general classes of gravity theories. Examples for nonminimally coupled and higher-order models are discussed.
    Keywords Physics ; QC1-999 ; Science ; Q ; DOAJ:Physics (General) ; DOAJ:Physics and Astronomy
    Language English
    Publishing date 2013-09-01T00:00:00Z
    Publisher EDP Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article: Gravitational waves in modified teleparallel theories of gravity.

    Abedi, Habib / Capozziello, Salvatore

    The European physical journal. C, Particles and fields

    2018  Volume 78, Issue 6, Page(s) 474

    Abstract: Teleparallel theory of gravity and its modifications have been studied extensively in literature. However, gravitational waves has not been studied enough in the framework of teleparallelism. In the present study, we discuss gravitational waves in ... ...

    Abstract Teleparallel theory of gravity and its modifications have been studied extensively in literature. However, gravitational waves has not been studied enough in the framework of teleparallelism. In the present study, we discuss gravitational waves in general theories of teleparallel gravity containing the torsion scalar
    Language English
    Publishing date 2018-06-09
    Publishing country France
    Document type Journal Article
    ZDB-ID 1459069-4
    ISSN 1434-6052 ; 1434-6044
    ISSN (online) 1434-6052
    ISSN 1434-6044
    DOI 10.1140/epjc/s10052-018-5967-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Noether symmetry approach in

    Bahamonde, Sebastian / Capozziello, Salvatore

    The European physical journal. C, Particles and fields

    2017  Volume 77, Issue 2, Page(s) 107

    Abstract: We consider the cosmology derived ... ...

    Abstract We consider the cosmology derived from
    Language English
    Publishing date 2017-02-16
    Publishing country France
    Document type Journal Article
    ZDB-ID 1459069-4
    ISSN 1434-6052 ; 1434-6044
    ISSN (online) 1434-6052
    ISSN 1434-6044
    DOI 10.1140/epjc/s10052-017-4677-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Classification of the Horndeski cosmologies via Noether symmetries.

    Capozziello, Salvatore / Dialektopoulos, Konstantinos F / Sushkov, Sergey V

    The European physical journal. C, Particles and fields

    2018  Volume 78, Issue 6, Page(s) 447

    Abstract: Adopting Noether point symmetries, we classify and integrate dynamical systems coming from Horndeski cosmologies. The method is particularly effective both to select the form of Horndeski models and to derive exact cosmological solutions. Starting from ... ...

    Abstract Adopting Noether point symmetries, we classify and integrate dynamical systems coming from Horndeski cosmologies. The method is particularly effective both to select the form of Horndeski models and to derive exact cosmological solutions. Starting from the Lagrangians selected by the Noether symmetries, it is possible to derive several modified theories of gravity like
    Language English
    Publishing date 2018-06-05
    Publishing country France
    Document type Journal Article
    ZDB-ID 1459069-4
    ISSN 1434-6052 ; 1434-6044
    ISSN (online) 1434-6052
    ISSN 1434-6044
    DOI 10.1140/epjc/s10052-018-5939-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Constraining generalized non-local cosmology from Noether symmetries.

    Bahamonde, Sebastian / Capozziello, Salvatore / Dialektopoulos, Konstantinos F

    The European physical journal. C, Particles and fields

    2017  Volume 77, Issue 11, Page(s) 722

    Abstract: We study a generalized non-local theory of gravity which, in specific limits, can become either the curvature non-local or teleparallel non-local theory. Using the Noether symmetry approach, we find that the coupling functions coming from the non-local ... ...

    Abstract We study a generalized non-local theory of gravity which, in specific limits, can become either the curvature non-local or teleparallel non-local theory. Using the Noether symmetry approach, we find that the coupling functions coming from the non-local terms are constrained to be either exponential or linear in form. It is well known that in some non-local theories, a certain kind of exponential non-local couplings is needed in order to achieve a renormalizable theory. In this paper, we explicitly show that this kind of coupling does not need to be introduced by hand, instead, it appears naturally from the symmetries of the Lagrangian in flat Friedmann-Robertson-Walker cosmology. Finally, we find de Sitter and power-law cosmological solutions for different non-local theories. The symmetries for the generalized non-local theory are also found and some cosmological solutions are also achieved using the full theory.
    Language English
    Publishing date 2017-10-30
    Publishing country France
    Document type Journal Article
    ZDB-ID 1459069-4
    ISSN 1434-6052 ; 1434-6044
    ISSN (online) 1434-6052
    ISSN 1434-6044
    DOI 10.1140/epjc/s10052-017-5283-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Gravitational effective action at second order in curvature and gravitational waves.

    Calmet, Xavier / Capozziello, Salvatore / Pryer, Daniel

    The European physical journal. C, Particles and fields

    2017  Volume 77, Issue 9, Page(s) 589

    Abstract: We consider the full effective theory for quantum gravity at second order in curvature including non-local terms. We show that the theory contains two new degrees of freedom beyond the massless graviton: namely a massive spin-2 ghost and a massive scalar ...

    Abstract We consider the full effective theory for quantum gravity at second order in curvature including non-local terms. We show that the theory contains two new degrees of freedom beyond the massless graviton: namely a massive spin-2 ghost and a massive scalar field. Furthermore, we show that it is impossible to fine-tune the parameters of the effective action to eliminate completely the classical spin-2 ghost because of the non-local terms in the effective action. Being a classical field, it is not clear anyway that this ghost is problematic. It simply implies a repulsive contribution to Newton's potential. We then consider how to extract the parameters of the effective action and show that it is possible to measure, at least in principle, the parameters of the local terms independently of each other using a combination of observations of gravitational waves and measurements performed by pendulum type experiments searching for deviations of Newton's potential.
    Language English
    Publishing date 2017-09-07
    Publishing country France
    Document type Journal Article
    ZDB-ID 1459069-4
    ISSN 1434-6052 ; 1434-6044
    ISSN (online) 1434-6052
    ISSN 1434-6044
    DOI 10.1140/epjc/s10052-017-5172-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: DNA Mutations via Chern-Simons Currents.

    Bajardi, Francesco / Altucci, Lucia / Benedetti, Rosaria / Capozziello, Salvatore / Sorbo, Maria Rosaria Del / Franci, Gianluigi / Altucci, Carlo

    European physical journal plus

    2021  Volume 136, Issue 10, Page(s) 1080

    Abstract: We test the validity of a possible schematization of DNA structure and dynamics based on the Chern-Simons theory, that is a topological field theory mostly considered in the context of effective gravity theories. By means of the expectation value of the ... ...

    Abstract We test the validity of a possible schematization of DNA structure and dynamics based on the Chern-Simons theory, that is a topological field theory mostly considered in the context of effective gravity theories. By means of the expectation value of the Wilson Loop, derived from this analogue gravity approach, we find the point-like curvature of genomic strings in KRAS human gene and COVID-19 sequences, correlating this curvature with the genetic mutations. The point-like curvature profile, obtained by means of the Chern-Simons currents, can be used to infer the position of the given mutations within the genetic string. Generally, mutations take place in the highest Chern-Simons current gradient locations and subsequent mutated sequences appear to have a smoother curvature than the initial ones, in agreement with a free energy minimization argument.
    Language English
    Publishing date 2021-10-28
    Publishing country Germany
    Document type Journal Article
    ISSN 2190-5444
    ISSN (online) 2190-5444
    DOI 10.1140/epjp/s13360-021-01960-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Noether symmetries in Gauss-Bonnet-teleparallel cosmology.

    Capozziello, Salvatore / De Laurentis, Mariafelicia / Dialektopoulos, Konstantinos F

    The European physical journal. C, Particles and fields

    2016  Volume 76, Issue 11, Page(s) 629

    Abstract: A generalized teleparallel cosmological model, [Formula: see text], containing the torsion ... ...

    Abstract A generalized teleparallel cosmological model, [Formula: see text], containing the torsion scalar
    Language English
    Publishing date 2016-11-18
    Publishing country France
    Document type Journal Article
    ZDB-ID 1459069-4
    ISSN 1434-6052 ; 1434-6044
    ISSN (online) 1434-6052
    ISSN 1434-6044
    DOI 10.1140/epjc/s10052-016-4491-0
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  9. Article: Nonlocal teleparallel cosmology.

    Bahamonde, Sebastian / Capozziello, Salvatore / Faizal, Mir / Nunes, Rafael C

    The European physical journal. C, Particles and fields

    2017  Volume 77, Issue 9, Page(s) 628

    Abstract: Even though it is not possible to differentiate general relativity from teleparallel gravity using classical experiments, it could be possible to discriminate between them by quantum gravitational effects. These effects have motivated the introduction of ...

    Abstract Even though it is not possible to differentiate general relativity from teleparallel gravity using classical experiments, it could be possible to discriminate between them by quantum gravitational effects. These effects have motivated the introduction of nonlocal deformations of general relativity, and similar effects are also expected to occur in teleparallel gravity. Here, we study nonlocal deformations of teleparallel gravity along with its cosmological solutions. We observe that nonlocal teleparallel gravity (like nonlocal general relativity) is consistent with the present cosmological data obtained by SNe Ia + BAO + CC + [Formula: see text] observations. Along this track, future experiments probing nonlocal effects could be used to test whether general relativity or teleparallel gravity gives the most consistent picture of gravitational interaction.
    Language English
    Publishing date 2017-09-20
    Publishing country France
    Document type Journal Article
    ZDB-ID 1459069-4
    ISSN 1434-6052 ; 1434-6044
    ISSN (online) 1434-6052
    ISSN 1434-6044
    DOI 10.1140/epjc/s10052-017-5210-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Book ; Online: Beyond Einstein Gravity

    Faraoni, Valerio / Capozziello, Salvatore

    A Survey of Gravitational Theories for Cosmology and Astrophysics

    (Fundamental Theories of Physics ; 170)

    2011  

    Abstract: Beyond Einstein's Gravity is a graduate level introduction to extended theories of gravity and cosmology, including variational principles, the weak-field limit, gravitational waves, mathematical tools, exact solutions, as well as cosmological and ... ...

    Author's details by Valerio Faraoni, Salvatore Capozziello
    Series title Fundamental Theories of Physics ; 170
    Abstract Beyond Einstein's Gravity is a graduate level introduction to extended theories of gravity and cosmology, including variational principles, the weak-field limit, gravitational waves, mathematical tools, exact solutions, as well as cosmological and astrophysical applications. The book provides a critical overview of the research in this area and unifies the existing literature using a consistent notation. Although the results apply in principle to all alternative gravities, a special emphasis is on scalar-tensor and f(R) theories. They were studied by theoretical physicists from early on, and in the 1980s they appeared in attempts to renormalize General Relativity and in models of the early universe. Recently, these theories have seen a new lease of life, in both their metric and metric-affine versions, as models of the present acceleration of the universe without introducing the mysterious and exotic dark energy. The dark matter problem can also be addressed in extended gravity. These applications are contributing to a deeper understanding of the gravitational interaction from both the theoretical and the experimental point of view. An extensive bibliography guides the reader into more detailed literature on particular topics.
    Keywords Astronomy ; Mathematics ; Physics ; Technik / Wissen Astronomie ; Technik / Wissen Mathematik ; Technik / Wissen Physik
    Language English
    Size Online-Ressource, v.: digital
    Publisher Springer Science+Business Media B.V
    Publishing place Dordrecht
    Document type Book ; Online
    Note Includes bibliographical references (p. 401-424) and index
    ISBN 1282996053 ; 1282996940 ; 9781282996946 ; 9789400701649 ; 9789400701656 ; 9781282996052 ; 9400701640 ; 9400701659
    DOI 10.1007/978-94-007-0165-6
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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