scholarly journals Inverse magnetic catalysis in bottom-up holographic QCD

2016 ◽  
Vol 94 (7) ◽  
Author(s):  
Nick Evans ◽  
Carlisson Miller ◽  
Marc Scott
Keyword(s):  
Bottom Up ◽  
Magnetic Catalysis ◽  
Holographic Qcd

scholarly journals Holographic QCD and magnetic fields

2021 ◽  
Vol 57 (7) ◽  
Author(s):  
Umut Gürsoy
Keyword(s):  
Magnetic Fields ◽  
Ground State ◽  
Chemical Potential ◽  
Chiral Condensate ◽  
Magnetic Catalysis ◽  
Large N ◽  
Field Temperature ◽  
Holographic Qcd ◽  
Quark Potential ◽  
Holographic Approach

AbstractWe review the holographic approach to electromagnetic phenomena in large N QCD. After a brief discussion of earlier holographic models, we concentrate on the improved holographic QCD model extended to involve magnetically induced phenomena. We explore the influence of magnetic fields on the QCD ground state, focusing on (inverse) magnetic catalysis of chiral condensate, investigate the phase diagram of the theory as a function of magnetic field, temperature and quark chemical potential, and, finally discuss effects of magnetic fields on the quark–anti-quark potential, shear viscosity, speed of sound and magnetization.

scholarly journals Holography at Work for Nuclear and Hadron Physics

2011 ◽  
Vol 2011 ◽  
pp. 1-62 ◽  
Author(s):  
Youngman Kim ◽  
Deokhyun Yi
Keyword(s):  
String Theory ◽  
Top Down ◽  
Bottom Up ◽  
Hadron Physics ◽  
Focus On Results ◽  
Holographic Qcd

The purpose of this review is to provide basic ingredients of holographic QCD to nonexperts in string theory and to summarize its interesting achievements in nuclear and hadron physics. We focus on results from a less stringy bottom-up approach and review a stringy top-down model with some calculational details.

scholarly journals Inverse magnetic catalysis from improved holographic QCD in the Veneziano limit

2017 ◽  
Vol 2017 (3) ◽  
Author(s):  
Umut Gürsoy ◽  
Ioannis Iatrakis ◽  
Matti Järvinen ◽  
Govert Nijs
Keyword(s):  
Magnetic Catalysis ◽  
Holographic Qcd

scholarly journals Holographic QCD in medium: a bottom up approach

2010 ◽  
Vol 2010 (6) ◽  
Author(s):  
Kwanghyun Jo ◽  
Bum-Hoon Lee ◽  
Chanyong Park ◽  
Sang-Jin Sin
Keyword(s):  
Bottom Up ◽  
Holographic Qcd

scholarly journals Magnetic catalysis and the chiral condensate in holographic QCD

2020 ◽  
Vol 2020 (10) ◽  
Author(s):  
Alfonso Ballon-Bayona ◽  
Jonathan P. Shock ◽  
Dimitrios Zoakos
Keyword(s):  
Magnetic Field ◽  
Symmetry Breaking ◽  
Chiral Symmetry ◽  
Chiral Limit ◽  
Chiral Symmetry Breaking ◽  
Free Energy Density ◽  
Chiral Condensate ◽  
Zero Magnetic Field ◽  
Magnetic Catalysis ◽  
Holographic Qcd

Abstract We investigate the effect of a non-zero magnetic field on the chiral condensate using a holographic QCD approach. We extend the model proposed by Iatrakis, Kiritsis and Paredes in [1] that realises chiral symmetry breaking dynamically from 5d tachyon condensation. We calculate the chiral condensate, magnetisation and susceptibilities for the confined and deconfined phases. The model leads, in the probe approximation, to magnetic catalysis of chiral symmetry breaking in both confined and deconfined phases. In the chiral limit, mq = 0, we find that in the deconfined phase a sufficiently strong magnetic field leads to a second order phase transition from the chirally restored phase to a chirally broken phase. The transition becomes a crossover as the quark mass increases. Due to a scaling in the temperature, the chiral transition will also be interpreted as a transition in the temperature for fixed magnetic field. We elaborate on the relationship between the chiral condensate, magnetisation and the (magnetic) free energy density. We compare our results at low and moderate temperatures with lattice QCD results.

Psychology and Culture: Top Down Versus Bottom Up?

PsycCRITIQUES ◽  
2005 ◽  
Vol 50 (19) ◽  
Author(s):  
Michael Cole
Keyword(s):  
Top Down ◽  
Bottom Up
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