Erratum: Mass gap of the nonlinear-σ model through the finite-temperature effective action [Phys. Rev. B47, 8353 (1993)]

1993 ◽  
Vol 48 (9) ◽  
pp. 6741-6741 ◽  
Author(s):  
David Se´ne´chal
Keyword(s):  
Effective Action ◽  
Finite Temperature ◽  
Mass Gap

Gaussian Approach to (1 + 1) Dimensional φ6 Solitons at Finite Temperature

1990 ◽  
Vol 45 (6) ◽  
pp. 779-782
Author(s):  
Rajkumar Roychoudhury ◽  
Manasi Sengupta
Keyword(s):  
Critical Temperature ◽  
Effective Potential ◽  
Finite Temperature ◽  
Soliton Solutions ◽  
Gap Equation ◽  
Potential Approach ◽  
Mass Gap ◽  
Gaussian Effective Potential

AbstractUsing the Gaussian effective potential approach, φ6 soliton solutions at finite temperature are studied for both the general case and the particular case λ2 = 2ξm2. A critical temperature is found at which soliton solutions cease to exist. The effective potential together with the mass-gap equation are studied in detail, and comparison with existing work on this subject is made

scholarly journals Finite-temperature effective action and thermalization of perturbations

1994 ◽  
Vol 422 (3) ◽  
pp. 521-540 ◽  
Author(s):  
Per Elmfors ◽  
Kari Enqvist ◽  
Iiro Vilja
Keyword(s):  
Effective Action ◽  
Finite Temperature

scholarly journals Analytic Results in (2+1)-Dimensional Finite Temperature LGT

1997 ◽  
Vol 12 (32) ◽  
pp. 5753-5766 ◽  
Author(s):  
M. Billó ◽  
M. Caselle ◽  
A. D'Adda
Keyword(s):  
Monte Carlo ◽  
Effective Action ◽  
Finite Temperature ◽  
Mean Field ◽  
Polyakov Loop ◽  
Critical Coupling ◽  
Dimensional Theory ◽  
Field Techniques ◽  
Large N ◽  
Good Agreement

In a (2 + 1)-dimensional pure LGT at finite temperature the critical coupling for the deconfinement transition scales as βc(nt) = Jcnt + a1, where nt is the number of links in the "timelike" direction of the symmetric lattice. We study the effective action for the Polyakov loop obtained by neglecting the spacelike plaquettes, and we are able to compute analytically in this context the coefficient a1 for any SU(N) gauge group; the value of Jc is instead obtained from the effective action by means of (improved) mean field techniques. Both coefficients have already been calculated in the large N limit in a previous paper. The results are in very good agreement with the existing Monte Carlo simulations. This fact supports the conjecture that, in the (2 + 1)-dimensional theory, spacelike plaquettes have little influence on the dynamics of the Polyakov loops in the deconfined phase.

scholarly journals CENTRAL CHARGES AND EFFECTIVE ACTION AT FINITE TEMPERATURE AND DENSITY

2004 ◽  
Vol 19 (03) ◽  
pp. 223-238 ◽  
Author(s):  
J. GAMBOA ◽  
J. LÓPEZ-SARRIÓN ◽  
M. LOEWE ◽  
F. MÉNDEZ
Keyword(s):  
Explicit Expression ◽  
Current Algebra ◽  
Effective Action ◽  
Finite Temperature ◽  
Gauge Theories ◽  
Central Charge ◽  
Thirring Model ◽  
Coupling Constant ◽  
Four Dimensions

The current algebra for gauge theories like QCD at finite temperature and density is studied. We start considering, the massless Thirring model at finite temperature and density, finding an explicit expression for the current algebra. The central charge only depends on the coupling constant and there are not new effects due to temperature and density. From this calculation, we argue how to compute the central charge for QCD4 and we argue why the central charge in four dimensions could be modified by finite temperature and density.

On the nonlocal effective action at finite temperature

1992 ◽  
Vol 276 (1-2) ◽  
pp. 122-126 ◽  
Author(s):  
A.V. Leonidov ◽  
A.I. Zelnikov
Keyword(s):  
Effective Action ◽  
Finite Temperature

The Non-local Odd-Parity O(e2) Effective Action of QED3 at Finite Temperature

1995 ◽  
Vol 242 (1) ◽  
pp. 77-116 ◽  
Author(s):  
I.J.R. Aitchison ◽  
J.A. Zuk
Keyword(s):  
Effective Action ◽  
Finite Temperature ◽  
Non Local
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