Phase transitions in a three-dimensional kinetic spin-1/2 Ising model with random field: Effective-field-theory study

2012 ◽  
Vol 85 (1) ◽  
Author(s):  
Emanuel Costabile ◽  
J. Ricardo de Sousa
Keyword(s):  
Field Theory ◽  
Phase Transitions ◽  
Ising Model ◽  
Random Field ◽  
Effective Field Theory ◽  
Three Dimensional ◽  
Effective Field

scholarly journals The magnetic susceptibility on the transverse antiferromagnetic Ising model: Analysis of the reentrant behavior

2016 ◽  
Vol 30 (17) ◽  
pp. 1630011
Author(s):  
Minos A. Neto ◽  
J. Ricardo de Sousa ◽  
Igor T. Padilha ◽  
Octavio D. Rodriguez Salmon ◽  
J. Roberto Viana ◽  
...  
Keyword(s):  
Field Theory ◽  
Phase Diagram ◽  
Magnetic Susceptibility ◽  
Ising Model ◽  
Magnetic Fields ◽  
Effective Field Theory ◽  
Three Dimensional ◽  
Effective Field ◽  
Antiferromagnetic Ising Model ◽  
Reentrant Phenomena

We study the three-dimensional antiferromagnetic Ising model in both uniform longitudinal [Formula: see text] and transverse [Formula: see text] magnetic fields by using the effective-field theory (EFT) with finite cluster [Formula: see text] spin (EFT-1). We analyzed the behavior of the magnetic susceptibility to investigate the reentrant phenomena that we have seen in the same phase diagram previously obtained in other papers. Our results shows the presence of two divergences in the susceptibility that indicates the existence of a reentrant behavior.

scholarly journals Cosmological phase transitions: is effective field theory just a toy?

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Marieke Postma ◽  
Graham White
Keyword(s):  
Field Theory ◽  
Phase Transition ◽  
Phase Transitions ◽  
Effective Field Theory ◽  
New Physics ◽  
Effective Field ◽  
Tree Level ◽  
Dark Sector ◽  
First Order ◽  
First Order Phase

Abstract To obtain a first order phase transition requires large new physics corrections to the Standard Model (SM) Higgs potential. This implies that the scale of new physics is relatively low, raising the question whether an effective field theory (EFT) description can be used to analyse the phase transition in a (nearly) model-independent way. We show analytically and numerically that first order phase transitions in perturbative extensions of the SM cannot be described by the SM-EFT. The exception are Higgs-singlet extension with tree-level matching; but even in this case the SM-EFT can only capture part of the full parameter space, and if truncated at dim-6 operators, the description is at most qualitative. We also comment on the applicability of EFT techniques to dark sector phase transitions.

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