scholarly journals Vacuum polarization of massive spinor fields in static black-string backgrounds

2008 ◽  
Vol 77 (2) ◽  
Author(s):  
Owen Pavel Fernández Piedra ◽  
Alejandro Cabo Montes de Oca
Keyword(s):  
Vacuum Polarization ◽  
Black String ◽  
Spinor Fields ◽  
Massive Spinor

Renormalized quantum stress–energy tensor for massive spinor fields around global monopoles

2020 ◽  
Vol 35 (11) ◽  
pp. 2050077
Author(s):  
Owen Pavel Fernández Piedra
Keyword(s):  
Spinor Field ◽  
Energy Conditions ◽  
Energy Tensor ◽  
Stress Energy Tensor ◽  
Spinor Fields ◽  
Characteristic Radius ◽  
Stress Energy ◽  
Massive Spinor ◽  
Global Monopoles ◽  
Tensor Formula

The renormalized quantum stress–energy tensor [Formula: see text] for a massive spinor field around global monopoles is constructed within the framework of Schwinger–DeWitt approximation, valid whenever the Compton length of the quantum field is much less than the characteristic radius of the curvature of the background geometry. The results obtained show that the quantum massive spinor field in the global monopole spacetime violates all the pointwise energy conditions.

scholarly journals De Sitter scalar–spinor interaction in Minkowski limit

2020 ◽  
Vol 29 (13) ◽  
pp. 2050092
Author(s):  
Y. Ahmadi
Keyword(s):  
Scalar Field ◽  
Yukawa Potential ◽  
Ambient Space ◽  
De Sitter ◽  
Field Interaction ◽  
Spinor Fields ◽  
Sitter Spacetime ◽  
Massive Spinor ◽  
Space Formalism ◽  
Ordinary Derivative

The scalar–spinor interaction Lagrangian is presented by the Yukawa potential. In dS ambient space formalism, the interaction Lagrangian of scalar–spinor fields was obtained from a new transformation which is very similar to the gauge theory. The interaction of massless minimally coupled (mmc) scalar and spinor fields was investigated. The Minkowski limit of the mmc scalar field and massive spinor field interaction in the ambient space formalism of de Sitter spacetime is calculated. The interaction Lagrangian and mmc scalar field in the null curvature limit become zero and the local transformation in the null curvature limit become a constant phase transformation and the interaction in this limit become zero. The covariant derivative reduces to ordinary derivative too. Then, we conclude that this interaction is due to the curvature of spacetime and then the mmc scalar field may be a part of a gravitational field.

scholarly journals Integrable λ-deformations of the Euclidean black string

2021 ◽  
Vol 964 ◽  
pp. 115327
Author(s):  
Sibylle Driezen ◽  
Konstantinos Sfetsos
Keyword(s):  
Black String

scholarly journals Vacuum polarization near boundaries

2021 ◽  
Vol 103 (1) ◽  
Author(s):  
Jonathan Wernersson ◽  
Jochen Zahn
Keyword(s):  
Vacuum Polarization
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