scholarly journals Thermodynamics of soft wall model of AdS/QCD in Einstein-Maxwell-Gauss-Bonnet Gravity

2020 ◽  
Author(s):  
Shobhit Sachan ◽  
Sanjay Siwach
Keyword(s):  
Black Hole ◽  
Transition Temperature ◽  
Chemical Potential ◽  
Space Time ◽  
Hard Wall ◽  
Wall Model ◽  
Bonnet Gravity ◽  
First Order ◽  
Soft Wall Model ◽  
Soft Wall

We investigate the thermodynamics of confinement/deconfinement transition in soft wall model of QCD with Gauss-Bonnet corrections using AdS/CFT correspondence. In bulk AdS space-time the transition is geometric and is known as Hawking-Page transition. The Hawking-Page transition between two geometries, namely charged AdS black hole and thermally charged AdS have been studied with Gauss-Bonnet corrections up-to first order. The Gauss-Bonnet coupling modifies the transition temperature of the system, but qualitative features remain unchanged. We obtain the curves between chemical potential and transition temperature for different values of Gauss-Bonnet couplings. We find that there exist a point in μ-T plane where lines with different value of Gauss-Bonnet coupling cross each other. This point may be the onset of the transition from first order to cross over behavior. The results are compared with that of the hard wall model.

scholarly journals RG flow of AC conductivity in soft wall model of QCD

2016 ◽  
Vol 31 (08) ◽  
pp. 1650030
Author(s):  
Neha Bhatnagar ◽  
Sanjay Siwach
Keyword(s):  
Black Hole ◽  
Renormalization Group ◽  
Numerical Solution ◽  
Ac Conductivity ◽  
Chemical Potential ◽  
Radial Coordinate ◽  
Wall Model ◽  
Soft Wall Model ◽  
Soft Wall ◽  
Holographic Qcd

We study the Renormalization Group (RG) flow of AC conductivity in soft wall model of holographic QCD. We consider the charged black hole metric and the explicit form of AC conductivity is obtained at the cutoff surface. We plot the numerical solution of conductivity flow as a function of radial coordinate. The equation of gauge field is also considered and the numerical solution is obtained for AC conductivity as a function of frequency. The results for AC conductivity are also obtained for different values of chemical potential and Gauss–Bonnet couplings.

scholarly journals THERMODYNAMICS OF SOFT WALL AdS/QCD AT FINITE CHEMICAL POTENTIAL

2012 ◽  
Vol 27 (28) ◽  
pp. 1250163 ◽  
Author(s):  
SHOBHIT SACHAN ◽  
SANJAY SIWACH
Keyword(s):  
Chemical Potential ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
Wall Model ◽  
Soft Wall Model ◽  
Soft Wall ◽  
Dimensional Gravity ◽  
The Difference ◽  
Two Phases ◽  
Low Temperature Phase

We study the thermodynamics of soft wall model in AdS/QCD framework. The low temperature phase of QCD is described by thermal AdS and high temperature phase by AdS black hole solution of five-dimensional gravity with negative cosmological constant. The chemical potential is introduced via the solution of U(1) vector field in the bulk. The difference of action densities in two phases is studied and the results are compared with hard wall model. The quark number susceptibility is also calculated in both models.

Holographic helical superconductor with higher curvature corrections

2018 ◽  
Vol 33 (01) ◽  
pp. 1850002 ◽  
Author(s):  
Subir Mukhopadhyay ◽  
Chandrima Paul
Keyword(s):  
Black Hole ◽  
Transition Temperature ◽  
Gauge Theory ◽  
Scalar Field ◽  
Chemical Potential ◽  
Critical Value ◽  
Free Energies ◽  
Holographic Superconductor ◽  
Bonnet Gravity ◽  
Chern Simons

We study [Formula: see text] gauge theory with Chern–Simons term, coupled to scalar field in adjoint, in Einstein–Gauss–Bonnet gravity. We explore phases of holographic superconductor in terms of the condensates and free energies in the background of AdS black hole and AdS soliton. In the case of black hole, we find with increasing strength of higher curvature terms, transition temperature decreases. For AdS soliton, the critical value of chemical potential increases as the higher curvature terms dominate.

scholarly journals NUCLEON RESONANCES AND GPDS IN AdS/QCD

2014 ◽  
Vol 26 ◽  
pp. 1460066 ◽  
Author(s):  
ALFREDO VEGA ◽  
IVAN SCHMIDT ◽  
THOMAS GUTSCHE ◽  
VALERY E. LYUBOVITSKIJ
Keyword(s):  
Roper Resonance ◽  
Wall Model ◽  
Nucleon Resonances ◽  
Soft Wall Model ◽  
Nucleon Spectrum ◽  
Soft Wall

We discuss an holographic soft wall model to describe nucleon properties. We pay special attention to nucleon spectrum, GPDs in the skewness case for nucleons and electroproduction of the N (1440) Roper resonance in soft-wall AdS/QCD.

scholarly journals ON KALUZA–KLEIN SPACE–TIME IN EINSTEIN–GAUSS–BONNET GRAVITY

2009 ◽  
Vol 18 (04) ◽  
pp. 599-611 ◽  
Author(s):  
ALFRED MOLINA ◽  
NARESH DADHICH
Keyword(s):  
Black Hole ◽  
Black Hole Solution ◽  
Dimensional Space ◽  
Space Time ◽  
Two Dimensional ◽  
Bonnet Gravity ◽  
Space Of Constant Curvature ◽  
Dimensional Black Hole ◽  
Dimensional Space Time ◽  
Kaluza Klein

By considering the product of the usual four-dimensional space–time with two dimensional space of constant curvature, an interesting black hole solution has recently been found for Einstein–Gauss–Bonnet gravity. It turns out that this as well as all others could easily be made to radiate Vaidya null dust. However, there exists no Kerr analog in this setting. To get the physical feel of the four-dimensional black hole space–times, we study asymptotic behavior of stresses at the two ends, r → 0 and r → ∞.

scholarly journals Extended Soft-wall Model for the QCD Phase Diagram

2017 ◽  
Vol 10 (3) ◽  
pp. 789
Author(s):  
R. Zöllner ◽  
F. Wunderlich ◽  
B. Kämpfer
Keyword(s):  
Phase Diagram ◽  
Wall Model ◽  
Qcd Phase Diagram ◽  
Soft Wall Model ◽  
Soft Wall

scholarly journals Chiral phase transition in the soft-wall model of AdS/QCD

2016 ◽  
Vol 2016 (4) ◽  
pp. 1-30 ◽  
Author(s):  
Kaddour Chelabi ◽  
Zhen Fang ◽  
Mei Huang ◽  
Danning Li ◽  
Yue-Liang Wu
Keyword(s):  
Phase Transition ◽  
Wall Model ◽  
Chiral Phase ◽  
Chiral Phase Transition ◽  
Soft Wall Model ◽  
Soft Wall
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