scholarly journals Polarization tensor of charged gluons in color magnetic background field at finite temperature

2008 ◽  
Vol 77 (10) ◽  
Author(s):  
M. Bordag ◽  
V. Skalozub
Keyword(s):  
Finite Temperature ◽  
Background Field ◽  
Polarization Tensor

scholarly journals Derivative corrections to the Heisenberg-Euler effective action

2021 ◽  
Vol 2021 (9) ◽  
Author(s):  
Felix Karbstein
Keyword(s):  
Electric Fields ◽  
Effective Action ◽  
Vacuum Polarization ◽  
Strong Field ◽  
Background Field ◽  
Polarization Tensor ◽  
Quantum Vacuum ◽  
Electron Positron ◽  
Vacuum Polarization Tensor ◽  
Electron Positron Pair

Abstract We show that the leading derivative corrections to the Heisenberg-Euler effective action can be determined efficiently from the vacuum polarization tensor evaluated in a homogeneous constant background field. After deriving the explicit parameter-integral representation for the leading derivative corrections in generic electromagnetic fields at one loop, we specialize to the cases of magnetic- and electric-like field configurations characterized by the vanishing of one of the secular invariants of the electromagnetic field. In these cases, closed-form results and the associated all-orders weak- and strong-field expansions can be worked out. One immediate application is the leading derivative correction to the renowned Schwinger-formula describing the decay of the quantum vacuum via electron-positron pair production in slowly-varying electric fields.

Gauge theories at finite temperature and the background field method

1990 ◽  
Vol 242 (3-4) ◽  
pp. 412-414 ◽  
Author(s):  
J. Antikainen ◽  
M. Chaichian ◽  
N.R. Pantoja ◽  
J.J. Salazar
Keyword(s):  
Finite Temperature ◽  
Gauge Theories ◽  
Background Field ◽  
Field Method ◽  
Background Field Method

scholarly journals Free Energy Density for Gauge Background Fields at Finite Temperature

2011 ◽  
Vol 21 (3) ◽  
pp. 277
Author(s):  
Phan Hong Lien
Keyword(s):  
Free Energy ◽  
Gauge Theory ◽  
Energy Density ◽  
Finite Temperature ◽  
Chemical Potential ◽  
Free Energy Density ◽  
Background Field ◽  
Field Method ◽  
Abelian Gauge ◽  
Background Fields

The effective action and background field method have been applied to investigate free energy density for non-Abelian gauge theory at finite temperature, in which quantum corrections are included and certain symmetries of generating functional are restored. Renormalization is also considered for the gauge field. We give result for the one loop free energy density of gauge theory at high temperature and non-zero chemical potential, correcting a result previously at zero temperature and density. Some results are extended up to two loops

scholarly journals PHOTON PROPAGATION IN A MAGNETIZED MEDIUM

2002 ◽  
Vol 17 (06n07) ◽  
pp. 1055-1058 ◽  
Author(s):  
SUSHAN KONAR
Keyword(s):  
Magnetic Field ◽  
Background Field ◽  
Photon Absorption ◽  
Polarization Tensor ◽  
Finite Temperature Field Theory ◽  
Photon Propagation ◽  
Time Formalism ◽  
Background Magnetic Field ◽  
Absorption Probabilities ◽  
Real Time Formalism

Using the real time formalism of the finite temperature field theory we calculate the 1-loop polarization tensor in the presence of a background magnetic field in a medium. The expression is obtained to linear order in the background field strength. We discuss the Faraday rotation as well as the photon absorption probabilities in this context.

scholarly journals ON THE WARD IDENTITIES AT FINITE TEMPERATURE

1994 ◽  
Vol 09 (36) ◽  
pp. 3383-3391 ◽  
Author(s):  
ASHOK DAS ◽  
MARCELO HOTT
Keyword(s):  
Finite Temperature ◽  
Polarization Tensor ◽  
Ward Identities ◽  
Fermion Loop

We show in both 1+1 and 3+1 dimensions that, contrary to the recent suggestions, the contribution of the fermion loop to the polarization tensor is manifestly transverse at finite temperature. Some subtleties associated with the Ward identities at finite temperature are also pointed out.

scholarly journals Background field method at finite temperature and density

2006 ◽  
Vol 635 (4) ◽  
pp. 213-217 ◽  
Author(s):  
M. Loewe ◽  
S. Mendizabal ◽  
J.C. Rojas
Keyword(s):  
Finite Temperature ◽  
Background Field ◽  
Field Method ◽  
Background Field Method
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