Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Bert Janssen"'
Publikováno v:
Physics Letters B, Vol 795, Iss , Pp 42-48 (2019)
We study non-trivial (i.e. non-Levi-Civita) connections in metric-affine Lovelock theories. First we study the projective invariance of general Lovelock actions and show that all connections constructed by acting with a projective transformation of t
Externí odkaz:
https://doaj.org/article/2e41bb3ee95e4011ad5bde2498c3d566
Autor:
Bert Janssen, Alejandro Jiménez-Cano
Publikováno v:
Physics Letters B, Vol 786, Iss , Pp 462-465 (2018)
We present a framework in which the projective symmetry of the Einstein–Hilbert action in metric-affine gravity is used to induce an effective coupling between the Dirac lagrangian and the Maxwell field. The effective U(1) gauge potential arises as
Externí odkaz:
https://doaj.org/article/c21bf4b8758f48b4855b6ffd4aa75ac4
Autor:
Bert Janssen, Alejandro Jiménez-Cano
Publikováno v:
Physics Letters B, Vol 798, Iss , Pp - (2019)
In this paper we prove that the k-th order metric-affine Lovelock Lagrangian is not a total derivative in the critical dimension n=2k in the presence of non-trivial non-metricity. We use a bottom-up approach, starting with the study of the simplest c
Externí odkaz:
https://doaj.org/article/0e0a16b6a8f347b298958ddbeccfde21
Autor:
Antonio N. Bernal, Bert Janssen, Alejandro Jiménez-Cano, José Alberto Orejuela, Miguel Sánchez, Pablo Sánchez-Moreno
Publikováno v:
Physics Letters B, Vol 768, Iss C, Pp 280-287 (2017)
We study the most general solution for affine connections that are compatible with the variational principle in the Palatini formalism for the Einstein–Hilbert action (with possible minimally coupled matter terms). We find that there is a family of
Externí odkaz:
https://doaj.org/article/967b4410e3134dfa96b0dcbd6c5e80a0
Publikováno v:
Physics Letters B, Vol 795, Iss, Pp 42-48 (2019)
Physics Letters
Digibug. Repositorio Institucional de la Universidad de Granada
instname
Physics Letters
Digibug. Repositorio Institucional de la Universidad de Granada
instname
We study non-trivial (i.e. non-Levi-Civita) connections in metric-affine Lovelock theories. First we study the projective invariance of general Lovelock actions and show that all connections constructed by acting with a projective transformation of t
Publikováno v:
Fundamental Physics and Physics Education Research ISBN: 9783030529222
We analyse the most general connection allowed by Einstein–Hilbert theory in Palatini formalism. We also consider a matter lagrangian independent of the affine connection. We show that any solution of the equation of the connection is essentially L
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a5ac0d96b77c644039122cceb5245cc
https://doi.org/10.1007/978-3-030-52923-9_5
https://doi.org/10.1007/978-3-030-52923-9_5
Autor:
O. Reardon, Christopher Sampson, John A. Schneider, Brendan Mulhern, R. Addo, Bert Janssen, Michael Herdman, Kashmira Shah, Kevin R. Page, M. Rodes Sanchez, P. Haywood, C. Thetford
Publikováno v:
Value in Health. 22:S733
Autor:
Bert Janssen, José Alberto Orejuela, Pablo Sánchez-Moreno, Alejandro Jiménez-Cano, Miguel Sánchez, Antonio N. Bernal
Publikováno v:
Physics Letters B, Vol 768, Iss C, Pp 280-287 (2017)
Digibug. Repositorio Institucional de la Universidad de Granada
instname
Physics Letters B
Digibug. Repositorio Institucional de la Universidad de Granada
instname
Physics Letters B
We study the most general solution for affine connections that are compatible with the variational principle in the Palatini formalism for the Einstein–Hilbert action (with possible minimally coupled matter terms). We find that there is a family of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b4c41fa9a7e57fc0f49cc9b7dc3eb933
http://hdl.handle.net/10481/46542
http://hdl.handle.net/10481/46542
Publikováno v:
Physics Letters B. 662(2):220-226
Matrix coordinate transformations are defined as substitution operators without requiring an ordering prescription or an inclusion function from the Abelian coordinate transformations. We construct transforming objects mimicking most of the propertie
Publikováno v:
Nuclear Physics B. 711:392-406
Using the non-Abelian action for coincident type IIB gravitational waves proposed in hep-th/0303183 we show that giant gravitons in the AdS 3 × S 3 × T 4 background can be described in terms of coincident waves expanding into a fuzzy cylinder, span