Advances in perturbative thermal field theory
Ulrike Kraemmer,Anton Rebhan +1 more
TL;DR: The progress in the last decade in perturbative quantum field theory at high temperatures and densities, made possible by the use of effective field theories and hard thermal/dense loop resummations in ultrarelativistic gauge theories, is reviewed in this paper.
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Abstract: The progress in the last decade in perturbative quantum field theory at high temperatures and densities, made possible by the use of effective field theories and hard thermal/dense loop resummations in ultrarelativistic gauge theories, is reviewed. The relevant methods are discussed in field theoretical models from simple scalar theories to non-Abelian gauge theories including gravity. In the simpler models, the aim is to give a pedagogical account of some of the relevant problems and their resolution, while in the more complicated but also more interesting models such as quantum chromodynamics, a summary of the results obtained so far is given together with references to a few of the most recent developments and open problems.
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References
Non-Fermi-liquid behavior in quantum critical systems
Junwu Gan,Eugene Wong +1 more
TL;DR: The long wavelength behavior of the gauge field is shown to be in the Gaussian universality class with a dynamical exponent z=3 in dimensions D≥2.5 implying that the gauge coupling constant is exactly marginal.
Expansions for field theories on S/sup 1/ x. sigma
TL;DR: In this article, the effective potential and the high-temperature regime of common relativistic phase-space integrals were investigated for field theories on S/sup 1/x sigma.
Superconductivity by long range color magnetic interaction in high density quark matter
TL;DR: In this article, it was shown that the long-range nature of the magnetic interaction changes the asymptotic behavior of the gap at large chemical potential, leading to the phenomenon of color superconductivity.
Anomalous damping in plasma
TL;DR: In this article, the anomalous damping effects of charged collective excitations in plasma were investigated and it was shown that they affect the infrared cut-off in the logarithmic integrals for the characteristic relaxation time in low-density Boltzmann plasma.
Color-neutral superconducting quark matter
TL;DR: In this paper, the authors investigated the consequences of enforcing local color neutrality on the color superconducting phases of quark matter by utilizing the Nambu-Jona-Lasinio model supplemented by diquark and the 't Hooft six-fermion interactions.