منابع مشابه
Finite temperature effective potential on hyperbolic spacetimes.
One major area of research in quantum field theory in curved spacetime in the 1980s has been on interacting quantum fields and their implications ([1, 2], for a review see [3]). The central object of physical interest is the effective potential which should define the dynamics of the early universe at scales bigger than the Planck scale. In particular in new inflationary models [4, 5] the effec...
متن کاملTime Dependent Effective Actions at Finite Temperature ∗
I study derivative expansions of effective actions at finite temperature, illustrating how the standard methods are badly defined at finite temperature. I then show that by setting up the initial conditions at a finite time, these problems are solved. 1.1 Zero temperature I will work with a simple model of two real fields φ and η 1 L[φ, η] = 1 2 η∆ −1 η − 1 2 gφη 2 + L 0 [φ], (1) and integratin...
متن کاملThe Finite Temperature Effective Potential for Local Composite Operators
The method of the effective action for the composite operators Φ2(x) and Φ4(x) is applied to the termodynamics of the scalar quantum field with λΦ4 interaction. An expansion of the finite temperature effective potential in powers of h̄ provides successive approximations to the free energy with an effective mass and an effective coupling determined by the gap equations. The numerical results are ...
متن کاملFinite Temperature Effective Potential in the Hartree-fock Approximation
In order to investigate the nature of the phase transition, we study the finite temperature effective potential for the λΦ theory in the Hartree-Fock approximation, which sums up all the daisy and superdaisy diagrams.
متن کاملSelf-consistent improvement of the finite-temperature effective potential.
We present a self-consistent calculation of the finite temperature effective potential for λφ 4 theory, using the composite operator effective potential in which an infinite series of the leading diagrams is summed up. Our calculation establishes the proper form of the leading correction to the perturbative one-loop effective potential.
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics Supplement
سال: 1997
ISSN: 0375-9687
DOI: 10.1143/ptps.129.209