scholarly journals Perturbative Ward identity in finite-temperature quantum electrodynamics

1995 ◽  
Vol 52 (2) ◽  
pp. 1296-1299
Author(s):  
Takao Kaneko
Keyword(s):  
Finite Temperature ◽  
Quantum Electrodynamics ◽  
Ward Identity

scholarly journals Quantum electrodynamics at finite temperature

1985 ◽  
Vol 164 (2) ◽  
pp. 233-276 ◽  
Author(s):  
John F. Donoghue ◽  
Barry R. Holstein ◽  
R.W. Robinett
Keyword(s):  
Finite Temperature ◽  
Quantum Electrodynamics

Simplifying calculations in real time finite temperature field theory

2007 ◽  
Vol 85 (6) ◽  
pp. 671-677
Author(s):  
T Fugleberg ◽  
M E Carrington
Keyword(s):  
Field Theory ◽  
Temperature Field ◽  
Real Time ◽  
Finite Temperature ◽  
Quantum Electrodynamics ◽  
Previous Experience ◽  
Ward Identities ◽  
Finite Temperature Field Theory ◽  
Time Path ◽  
11.10 Wx

In this paper, we discuss a Mathematica program that we have written that calculates the integrand for amplitudes in the closed-time-path formulation of real-time finite-temperature field theory. The program is designed to be used by someone with no previous experience with Mathematica. It performs contractions over tensor indices that appear in real-time finite-temperature field theory and gives the result in the 1-2, Keldysh or R/A basis. As an illustration of this program, we discuss the calculation of all 3-point ward identities in finite-temperature quantum electrodynamics with full vertices. PACS Nos.: 11.10.Wx,11.15.-q

scholarly journals Quantization of Gravity and Finite Temperature Effects

Particles ◽  
2021 ◽  
Vol 4 (4) ◽  
pp. 468-488
Author(s):  
I. Y. Park
Keyword(s):  
Perturbation Theory ◽  
Finite Temperature ◽  
Quantum Electrodynamics ◽  
Scattering Amplitude ◽  
Asymptotic Freedom ◽  
Loop Analysis ◽  
Optimal Perturbation ◽  
Quantization Of Gravity ◽  
Gauge Fixing ◽  
Covariant Derivation

Gravity is perturbatively renormalizable for the physical states which can be conveniently defined via foliation-based quantization. In recent sequels, one-loop analysis was explicitly carried out for Einstein-scalar and Einstein-Maxwell systems. Various germane issues and all-loop renormalizability have been addressed. In the present work we make further progress by carrying out several additional tasks. Firstly, we present an alternative 4D-covariant derivation of the physical state condition by examining gauge choice-independence of a scattering amplitude. To this end, a careful dichotomy between the ordinary, and large gauge symmetries is required and appropriate gauge-fixing of the ordinary symmetry must be performed. Secondly, vacuum energy is analyzed in a finite-temperature setup. A variant optimal perturbation theory is implemented to two-loop. The renormalized mass determined by the optimal perturbation theory turns out to be on the order of the temperature, allowing one to avoid the cosmological constant problem. The third task that we take up is examination of the possibility of asymptotic freedom in finite-temperature quantum electrodynamics. In spite of the debates in the literature, the idea remains reasonable.

Sign in / Sign up

Export Citation Format

Share Document