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Scalar quantum field theory in disordered media
(Amer Physical Soc, 2011-06-21)
A free massive scalar field in inhomogeneous random media is investigated. The coefficients of the Klein-Gordon equation are taken to be random functions of the spatial coordinates. The case of a disordered medium modeled ...
Generalised teleparallel quintom dark energy non-minimally coupled with the scalar torsion and a boundary term
(2018)
Within this work, we propose a new generalised quintom dark energy model in the teleparallel alternative of general relativity theory, by considering a non-minimal coupling between the scalar fields of a quintom model with ...
Scalar-multi-tensorial equivalence for higher order f (R,del R-mu,del(mu 1)del R-mu 2, ... ,del(mu 1) ... del R-mu n) theories of gravity
(Amer Physical Soc, 2016-06-13)
The equivalence between theories depending on the derivatives of R, i.e. f(R, del R, ... ,del R-n), and scalar-multi-tensorial theories is verified. The analysis is done in both metric and Palatini formalisms. It is shown ...
Scalar-multi-tensorial equivalence for higher order f (R,μR,μ1μ2R,...,μ1...μnR) theories of gravity
(2016-06-13)
The equivalence between theories depending on the derivatives of R, i.e. f(R,R,...,nR), and scalar-multi-tensorial theories is verified. The analysis is done in both metric and Palatini formalisms. It is shown that ...
Trace anomaly for 4D higher derivative scalar-dilaton theory
(Revista Mexicana de Física, 2009)
Gravity coupled to a scalar field from a Chern-Simons action : describing rotating hairy black holes and solitons with gauge fields
(2023-02)
Einstein gravity minimally coupled to a scalar field with a two-parameter Higgs-like self-interaction in three spacetime dimensions is recast in terms of a Chern-Simons form for the algebra g+ ⊕ g− where, depending on the ...
Reflected entropy for free scalars
(Springer, 2020-11)
We continue our study of reflected entropy, R(A, B), for Gaussian systems. In this paper we provide general formulas valid for free scalar fields in arbitrary dimensions. Similarly to the fermionic case, the resulting ...
Mirrors and field sources in a Lorentz-violating scalar field theory
(2020-05-01)
In this paper we consider classical effects in a model for a scalar field incorporating Lorentz symmetry breaking due to the presence of a single background vector vμ coupled to its derivative. We investigate of the ...