scholarly journals Weinberg power counting and the quark determinant at small chemical potential

2010 ◽  
Vol 81 (6) ◽  
Author(s):  
E. S. Fraga ◽  
C. Villavicencio
Keyword(s):  
Chemical Potential ◽  
Power Counting ◽  
Small Chemical

scholarly journals Gluodynamics and deconfinement phase transition under rotation from holography

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Xun Chen ◽  
Lin Zhang ◽  
Danning Li ◽  
Defu Hou ◽  
Mei Huang
Keyword(s):  
Phase Transition ◽  
Angular Velocity ◽  
Chemical Potential ◽  
Entropy Density ◽  
Thermodynamic Quantities ◽  
Strongly Coupled ◽  
Trace Anomaly ◽  
Holographic Qcd ◽  
Deconfinement Phase Transition ◽  
Small Chemical

Abstract We investigate rotating effect on deconfinement phase transition in an Einstein-Maxwell-Dilaton (EMD) model in bottom-up holographic QCD approach. By constructing a rotating black hole, which is supposed to be dual to rotating strongly coupled nuclear matter, we investigate the thermodynamic quantities, including entropy density, pressure, energy density, trace anomaly, sound speed and specific heat for both pure gluon system and two-flavor system under rotation. It is shown that those thermodynamic quantities would be enhanced by large angular velocity. Also, we extract the information of phase transition from those thermodynamic quantities, as well as the order parameter of deconfinement phase transition, i.e. the loop operators. It is shown that, in the T − ω plane, for two-flavor case with small chemical potential, the phase transition is always crossover. The transition temperature decreases slowly with angular velocity and chemical potential. For pure gluon system with zero chemical potential, the phase transition is always first order, while at finite chemical potential a critical end point (CEP) will present in the T − ω plane.

scholarly journals How the Quark Number fluctuates in QCD at small chemical potential

2011 ◽  
Author(s):  
Kim Splittorff ◽  
Maria-Paola Lombardo ◽  
Jacobus Verbaarschot
Keyword(s):  
Chemical Potential ◽  
Quark Number ◽  
Small Chemical

scholarly journals Spin polarizations under a pseudovector interaction between quarks with the Kobayashi–Maskawa–’t Hooft term in high density quark matter

2020 ◽  
Vol 29 (01) ◽  
pp. 2050003 ◽  
Author(s):  
Masatoshi Morimoto ◽  
Yasuhiko Tsue ◽  
João da Providência ◽  
Constança Providência ◽  
Masatoshi Yamamura
Keyword(s):  
Spin Polarization ◽  
Quark Matter ◽  
Strange Quark ◽  
Chemical Potential ◽  
High Density ◽  
Quark Spin ◽  
Flavor Mixing ◽  
Small Chemical

A possibility of a quark spin polarization originating from a pseudovector condensate is investigated in the three-flavor Nambu–Jona–Lasinio model with the Kobayashi–Maskawa–’t Hooft interaction which leads to flavor mixing. It is shown that a pseudovector condensate related to the strange quark easily occurs compared with pseudovector condensate related to light quarks. Further, it is shown that the pseudovector condensate related to the strange quark appears at a slightly small chemical potential by the effect of the flavor mixing due to the Kobayashi–Maskawa–’t Hooft interaction.

scholarly journals Complexified quasinormal modes and the pole-skipping in a holographic system at finite chemical potential

2020 ◽  
Vol 2020 (10) ◽  
Author(s):  
Navid Abbasi ◽  
Sara Tahery
Keyword(s):  
Quantum Chaos ◽  
Chemical Potential ◽  
Quasinormal Modes ◽  
Threshold Value ◽  
Relevant Information ◽  
Derivative Expansion ◽  
Absolute Value ◽  
Field Fluctuations ◽  
Small Chemical ◽  
Diffusion Pole

Abstract We develop a method to study coupled dynamics of gauge-invariant variables, constructed out of metric and gauge field fluctuations on the background of a AdS5 Reissner-Nordström black brane. Using this method, we compute the numerical spectrum of quasinormal modes associated with fluctuations of spin 0, 1 and 2, non-perturbatively in μ/T . We also analytically compute the spectrum of hydrodynamic excitations in the small chemical potential limit. Then, by studying the spectral curve at complex momenta in every spin channel, we numerically find points at which hydrodynamic and non-hydrodynamic poles collide. We discuss the relation between such collision points and the convergence radius of the hydrodynamic derivative expansion. Specifically in the spin 0 channel, we find that within the range $$ 1.1\underset{\sim }{<}\mu /T\underset{\sim }{<}2 $$ 1.1 < ∼ μ / T < ∼ 2 , the radius of convergence of the hydrodynamic sound mode is set by the absolute value of the complex momentum corresponding to the point at which the sound pole collides with the hydrodynamic diffusion pole. It shows that in holographic systems at finite chemical potential, the convergence of the hydrodynamic derivative expansion in the mentioned range is fully controlled by hydrodynamic informa- tion. As the last result, we explicitly show that the relevant information about quantum chaos in our system can be extracted from the pole-skipping points of energy density re- sponse function. We find a threshold value for μ/T , lower than which the pole-skipping points can be computed perturbatively in a derivative expansion.

scholarly journals QCD sign problem for small chemical potential

2007 ◽  
Vol 75 (11) ◽  
Author(s):  
K. Splittorff ◽  
J. J. M. Verbaarschot
Keyword(s):  
Chemical Potential ◽  
Sign Problem ◽  
Small Chemical

scholarly journals QCD simulations at small chemical potential

2003 ◽  
Vol 119 ◽  
pp. 541-543 ◽  
Author(s):  
Ph. de Forcrand ◽  
S. Kim ◽  
T. Takaishi
Keyword(s):  
Chemical Potential ◽  
Small Chemical

scholarly journals QCD thermal phase transition in the presence of a small chemical potential

2002 ◽  
Vol 66 (7) ◽  
Author(s):  
C. R. Allton ◽  
S. Ejiri ◽  
S. J. Hands ◽  
O. Kaczmarek ◽  
F. Karsch ◽  
...  
Keyword(s):  
Phase Transition ◽  
Chemical Potential ◽  
Thermal Phase Transition ◽  
Thermal Phase ◽  
Small Chemical

INFLUENCE OF GAUGE BOSON MASS ON FERMION CHIRAL CONDENSATE IN QED3

2009 ◽  
Vol 24 (20n21) ◽  
pp. 3969-3974 ◽  
Author(s):  
JIAN-FENG LI ◽  
HONG-TAO FENG ◽  
WEI-MIN SUN ◽  
HONG-SHI ZONG
Keyword(s):  
Chiral Symmetry ◽  
Gauge Boson ◽  
Chemical Potential ◽  
Critical Mass ◽  
Chiral Condensate ◽  
Boson Mass ◽  
Gauge Boson Mass ◽  
Small Chemical

For the number of fermion flavors N = 2, we numerically solve the coupled Dyson–Schwinger equation for the fermion and gauge boson propagators of QED3 using the fermion–gauge-boson vertex ansatz [Formula: see text] for a range of finite gauge boson mass ζ and chemical potential μ. For small chemical potential μ it is found that chiral symmetry gets restored when ζ is larger than a critical mass ζc and the value of ζc is not sensitive to the variation of chemical potential.

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