The present paper aims at investigating the manner of two dissipative massive scalar fields. Two massive scalar fields that interact with a reservoir were considered and a reservoir was modeled by continuum Klein-Gordon fields. The Lagrangian of the total system was canonically quantized and the dynamics of the system was determined using the Euler-Lagrange equation. Then, the explicit form of the...

The vacuum radiation of a massive scalar field is studied by means single moving mirror. equation with an arbitrary-shaped mirror in (d+1) dimensions given perturbatively the non-relativistic limit. Explicit results are obtained for flat (1+1) and (3+1) dimensions. power friction force on intrinsic mass found to suppress radiation. In dimensions, modification frequency spectra angular emitted p...

We present the quasinormal frequencies of the massive scalar field in the background of a Schwarzchild black hole surrounded by quintessence with the third-order WKB method. The mass of the scalar field u plays an important role in studying the quasinormal frequencies, the real part of the frequencies increases linearly as mass u increases, while the imaginary part in absolute value decreases l...

We present the quasinormal frequencies of the massive scalar field in the background of a Schwarzchild black hole surrounded by quintessence with the third-order WKB method. The mass of the scalar field u plays an important role in studying the quasinormal frequencies, the real part of the frequencies increases linearly as mass u increases, while the imaginary part in absolute value decreases l...

A four-dimensional static black hole solution of Einstein equation conformally coupled to a massive and self interacting scalar field is obtained. A nontrivial scalar solution proposes a weak scalar hair. A dressed black hole shows a trace of scalar charge in the metric signalling the presence of scalar hair. A number of metrics with regular horizons and temperatures are also proposed. PACS num...

A bstract We explore extensions of the double copy to massive theories and find a new cubic theory with local copy. consider nonlinear sigma model special galileon theory, massless versions which are known be related through show that by performing Kaluza-Klein reduction these from five dimensions down four, relation exists between resulting four-dimensional scalar field theories. This requires...