Zobrazeno 1 - 10
of 101
pro vyhledávání: '"Andrei O. Barvinsky"'
Autor:
Andrei O. Barvinsky, Diego Blas, Mario Herrero-Valea, Sergey M. Sibiryakov, Christian F. Steinwachs
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 7, Pp 1-42 (2018)
Abstract Using the background-field method we demonstrate the Becchi-Rouet-Stora-Tyutin (BRST) structure of counterterms in a broad class of gauge theories. Put simply, we show that gauge invariance is preserved by renormalization in local gauge fiel
Externí odkaz:
https://doaj.org/article/bb0a8e8e87974cb692dbf2f914f3cba6
Publikováno v:
Physics Letters B, Vol 782, Iss , Pp 55-60 (2018)
We check the cancellation of the vacuum energy in the Wess–Zumino model at the two-loop order in the component field formalisms with and without auxiliary fields. We show that in both cases the vacuum energy is equal to zero. However, in the formal
Externí odkaz:
https://doaj.org/article/5e4bddef49954fd08e3367049a2a1d89
Autor:
Andrei O. Barvinsky, Diego Blas, Mario Herrero-Valea, Dmitry V. Nesterov, Guillem Pérez-Nadal, Christian F. Steinwachs
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 6, Pp 1-35 (2017)
Abstract We study the one-loop covariant effective action of Lifshitz theories using the heat kernel technique. The characteristic feature of Lifshitz theories is an anisotropic scaling between space and time. This is enforced by the existence of a p
Externí odkaz:
https://doaj.org/article/d00f48987681451f8fc0248e08371f76
Publikováno v:
Physical Review
We derive the full set of beta functions for the marginal essential couplings of projectable Horava gravity in (3 + 1)-dimensional spacetime. To this end we compute the divergent part of the one-loop effective action in static background with arbitra
Publikováno v:
Physical Review D. 103
We consider modifications of general relativity characterized by a special noncovariant constraint on metric coefficients, which effectively generates a perfect-fluid type of matter stress tensor in Einstein equations. Such class of modified gravity
We give a formal treatment of the "Correlated Worldline" theory of quantum gravity. The generating functional is written as a product over multiple copies of the coupled matter and gravitational fields; paths for fields are correlated via gravity its
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::19ebb2b64ecd9165b36d6440737b087d
One of the sources of incompatibility between general relativity and quantum mechanics is perturbative non-renormalizability of quantum gravity in $3+1$ spacetime dimensions. Here, we show that in the presence of disorder induced by random networks o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9cb28a02e38b6f14c35642fc272eb91e
Publikováno v:
Physics Letters B, Vol 774, Iss C, Pp 59-63 (2017)
Physics Letters B. 2017. Vol. 774. P. 59-63
Physics Letters B
Physics Letters B. 2017. Vol. 774. P. 59-63
Physics Letters B
We suggest a Lorentz non-invariant generalization of the unimodular gravity theory, which is classically equivalent to general relativity with a locally inert (devoid of local degrees of freedom) perfect fluid having an equation of state with a const
Autor:
Andrei O. Barvinsky
Publikováno v:
Russian physics journal. 2017. Vol. 59, № 11. P. 1788-1797
We put forward a conjecture that for a special class of models – models of the double-trace deformation and brane-induced gravity types – the principle of holographic dualitiy can be extended beyond conformal invariance and anti-de Sitter (AdS) i
Autor:
Andrei O. Barvinsky, N. Kolganov
The recently suggested generalized unimodular gravity theory, which was originally put forward as a model of dark energy, can serve as a model of cosmological inflation driven by the effective perfect fluid -- the dark purely gravitational sector of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d80fde77d312afff7ab7d98f6ac2e591
http://arxiv.org/abs/1908.05697
http://arxiv.org/abs/1908.05697