Zobrazeno 1 - 10
of 113
pro vyhledávání: '"Kovács, Tamás G."'
Autor:
Kovacs, Tamas G.
We solve the long-standing problem concerning the fate of the chiral $U(1)_A$ symmetry in QCD-like theories at high temperature in the chiral limit. We introduce a simple instanton based random matrix model that precisely reproduces the properties of
Externí odkaz:
http://arxiv.org/abs/2312.08775
We present methods to constrain fermionic condensates on the level of the path integral, which grant access to the quantum effective potential in the infinite volume limit. In the case of a spontaneously broken symmetry, this potential possesses a ma
Externí odkaz:
http://arxiv.org/abs/2312.01960
Autor:
Kovacs, Tamas G.
We propose a new way of understanding how chiral symmetry is realized in the high temperature phase of QCD. Based on the finding that a simple free instanton gas precisely describes the details of the lowest part of the spectrum of the lattice overla
Externí odkaz:
http://arxiv.org/abs/2311.04208
Autor:
Kovacs, Tamas G.
It is known that contrary to expectations, the order parameter of chiral symmetry breaking, the Dirac spectral density at zero virtuality does not vanish above the critical temperature of QCD. Instead, the spectral density develops a pronounced peak
Externí odkaz:
http://arxiv.org/abs/2212.05824
Autor:
Kovacs, Tamas G.
It is known that the deconfining transition of QCD is accompanied by the appearance of localized eigenmodes at the low end of the Dirac spectrum. In the quenched case localization appears exactly at the critical temperature of deconfinement. In the p
Externí odkaz:
http://arxiv.org/abs/2112.05454
We investigate the role of inhomogeneous field configurations in systems with a spontaneously broken continuous global symmetry. Spontaneous breaking is usually defined as a specific double limit, first infinite volume at finite explicit breaking sou
Externí odkaz:
http://arxiv.org/abs/2111.01493
Autor:
Giordano, Matteo, Kovacs, Tamas G.
Publikováno v:
Universe 2021, 7(6), 194
It is by now well established that Dirac fermions coupled to non-Abelian gauge theories can undergo an Anderson-type localization transition. This transition affects eigenmodes in the lowest part of the Dirac spectrum, the ones most relevant to the l
Externí odkaz:
http://arxiv.org/abs/2104.14388
Autor:
Vig, Reka A., Kovacs, Tamas G.
Publikováno v:
Phys. Rev. D 103, 114510 (2021)
We show that the nature of the topological fluctuations in $SU(3)$ gauge theory changes drastically at the finite temperature phase transition. Starting from temperatures right above the phase transition topological fluctuations come in well separate
Externí odkaz:
http://arxiv.org/abs/2101.01498
Autor:
Vig, Reka A., Kovacs, Tamas G.
We study the finite temperature localization transition in the spectrum of the overlap Dirac operator. Simulating the quenched approximation of QCD, we calculate the mobility edge, separating localized and delocalized modes in the spectrum. We do thi
Externí odkaz:
http://arxiv.org/abs/2001.06872
Autor:
Vig, Reka A., Kovacs, Tamas G.
Across the finite temperature transition to the quark-gluon plasma, the QCD topological susceptibility decreases sharply. Thus in the high temperature phase the remaining topological objects (possibly calorons) form a weakly interacting dilute gas. T
Externí odkaz:
http://arxiv.org/abs/1911.10086