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In these lectures, we introduce finite temperature QCD on the lattice to non-experts of the subject. We first formulate lattice QCD both at zero and finite temperatures. Then a section is devoted to the topic of improved lattice actions…

高能物理 - 格点 · 物理学 2008-11-26 K. Kanaya

We investigate the chiral phase transition within a sphere under a uniform background magnetic field. The Nambu--Jona-Lasinio (NJL) model is employed and the MIT boundary condition is imposed for the spherical confinement. Using the wave…

核理论 · 物理学 2024-01-29 Bing-Jun Zuo , Zheng Zhang , Chao Shi , Yong-Feng Huang

Recent developments in finite-temperature QCD with dynamical quarks are reviewed focusing on the topics of critical temperature, the equation of state, and critical behaviors around the chiral phase transition.

高能物理 - 格点 · 物理学 2009-10-31 Shinji Ejiri

In this work, we consider the effect of a constant anomalous magnetic moment (AMM) of quarks in the SU(2) Nambu--Jona-Lasinio model in the mean field approximation. To this end, we use the Schwinger {\it ansatz}, which represents a linear…

高能物理 - 唯象学 · 物理学 2022-08-24 Ricardo L. S. Farias , William R. Tavares , Rodrigo M. Nunes , Sidney S. Avancini

The BEC-BCS crossover for a NJL model with diquark interactions is studied in the presence of an external magnetic field. Particular attention is paid to different regularization schemes used in the literature. A thorough comparison of…

高能物理 - 唯象学 · 物理学 2023-05-05 Dyana C. Duarte , P. G. Allen , R. L. S. Farias , Patrícia H. A. Manso , Rudnei O. Ramos , N. N. Scoccola

We control quantum fluctuations to create the ground state magnetic phases of a classical Ising model with a tunable longitudinal magnetic field using a system of 6 to 10 atomic ion spins. Due to the long-range Ising interactions, the…

A theory of the magnetic field driven (semi-)metal-insulator phase transition is developed for planar systems with a low density of carriers and a linear (i.e., relativistic like) dispersion relation for low energy quasiparticles. The…

凝聚态物理 · 物理学 2009-11-07 E. V. Gorbar , V. P. Gusynin , V. A. Miransky , I. A. Shovkovy

The phenomenon of magnetic catalysis of chiral symmetry breaking in the quantum chromodynamic theory in the framework of logarithmic quark sigma model is studied. Thermodynamic properties are calculated in the mean-field approximation such…

高能物理 - 唯象学 · 物理学 2018-01-23 M. Abu-Shady

We study the effect of an external magnetic field on the chiral phase transition in the theory of the strong interaction by means of a renormalization-group (RG) fixed-point analysis, relying on only one physical input parameter, the strong…

高能物理 - 唯象学 · 物理学 2014-12-19 Jens Braun , Walid Ahmed Mian , Stefan Rechenberger

We study the thermo-magnetic properties of the strong coupling constant G and quark mass M entering the Nambu-Jona-Lasinio model. For this purpose, we compute the quark condensate and compare it to lattice QCD (LQCD) results to extract the…

高能物理 - 唯象学 · 物理学 2016-09-28 Alejandro Ayala , C. A. Dominguez , L. A. Hernandez , M. Loewe , Alfredo Raya , J. C. Rojas , C. Villavicencio

We present an ab initio quantum theory of the finite temperature magnetism of iron and nickel. A recently developed technique which combines dynamical mean-field theory with realistic electronic structure methods, successfully describes the…

强关联电子 · 物理学 2007-05-23 A. I. Lichtenstein , M. I. Katsnelson , G. Kotliar

Pion superfluid phase transition under external magnetic field including the inverse magnetic catalysis (IMC) effect is investigated by the Pauli-Villars regularized NJL model. Based on the Goldstone's theorem, we apply the massless…

核理论 · 物理学 2022-11-23 Shijun Mao , Yvming Tian

Magnetic Catalysis is a known proposal for inducing dynamical axionic gapped phases by means of external magnetic fields from a Weyl or Dirac semimetal phase. At finite Fermi level, the phase transition is of first order type and the…

强关联电子 · 物理学 2024-05-30 Joan Bernabeu , Alberto Cortijo

The current understanding of finite temperature phase transitions in QCD is reviewed. A critical discussion of refined phase transition criteria in numerical lattice simulations and of analytical tools going beyond the mean-field level in…

高能物理 - 格点 · 物理学 2008-11-26 Hildegard Meyer-Ortmanns

The phase structure of zero temperature twisted mass lattice QCD is investigated. We find strong metastabilities in the plaquette observable when the untwisted quark mass assumes positive or negative values. We provide interpretations of…

高能物理 - 格点 · 物理学 2009-11-10 F. Farchioni , R. Frezzotti , K. Jansen , I. Montvay , G. C. Rossi , E. Scholz , A. Shindler , N. Ukita , C. Urbach , I. Wetzorke

Numerical simulations of quantum chromodynamics at nonzero temperature provide information from first principles about the physical properties of the quark gluon plasma. Because the lattice approximation can be refined indefinitely, results…

高能物理 - 唯象学 · 物理学 2016-11-03 Carleton DeTar

I discuss lattice QCD calculations of the properties of strongly interacting matter at finite temperature, including the determination of the transition temperature Tc, equation of state, different static screening lengths and quarkonium…

高能物理 - 格点 · 物理学 2008-11-26 Peter Petreczky

I discuss recent developments in lattice QCD thermodynamics on the nature of the transition at finite temperature and density, equation of state, screening of static charges and meson spectral functions at high temperatures.

高能物理 - 格点 · 物理学 2009-11-10 P. Petreczky

The effect of an external (electro)magnetic field on the finite temperature transition of QCD is studied. We generate configurations at various values of the quantized magnetic flux with $N_f=2+1$ flavors of stout smeared staggered quarks,…

高能物理 - 格点 · 物理学 2012-02-29 G. S. Bali , F. Bruckmann , G. Endrodi , Z. Fodor , S. D. Katz , S. Krieg , A. Schafer , K. K. Szabo

We use a three-flavor Nambu--Jona-Lasinio model to study the thermodynamics of strange quark matter under a strong magnetic field. The model Lagrangian features flavor SU(3) four-quark interactions and six-quark interactions that break the…