Vacuum decay in real time and imaginary time formalisms
نویسندگان
چکیده
منابع مشابه
N-point Functions in Imaginary-and Real-time Finite-temperature Formalisms
It is proved that calculations of three-point diagrams using the Real-Time Formalism of nite temperature eld theory produce the time-ordered Green functions while the Imaginary-Time Formalism calculate retarded and advanced Green functions. A non-trivial relation between these Green functions is found. Similarly, a spectral representation for the real-time three-point function is found. The hig...
متن کاملFinite time vacuum survival amplitude and vacuum energy decay
The problem of the vacuum energy decay is studied for both signs of the cosmological constant, through the analysis of the vacuum survival amplitude, defined in terms of the conformal time, z, by Aðz; z0Þ hvac zjvac z0i. Transition amplitudes are computed for finite time span, Z z0 z, and their late time behavior (directly related to the putative decay width of the state), and the transients ar...
متن کاملReal and imaginary - time QQ correlators in a thermal medium
We investigate the behavior of a pair of heavy fermions, denoted by Q and Q̄, in a hot/dense medium. Although we have in mind the situation where Q and Q̄ denote heavy quarks, our treatment will be limited to simplified models, which bear only some general similarities with QCD. We study in particular the limiting case where the mass of the heavy fermions is infinite. Then a number of results can...
متن کاملCutting rules in the real time formalisms at finite temperature
In this paper, we review the set of rules specific to the calculation of the imaginary part of a Green’s function at finite temperature in the real-time formalisms. Emphasis is put on the clarification of a recent controversy concerning these rules in the “1/2” formalism, more precisely on the issue related to the interpretation of these rules in terms of cut diagrams, like at T = 0. On the sec...
متن کاملFinite temperature QCD coupling constant- imaginary versus real time framework
The correspondence between the imaginary time and real time thermal running coupling constant is discussed. The temperature dependence is derived in pure QCD at one-loop order in a generalized momentum subtraction (MOM) renormalization scheme.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 2019
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.100.016011