scholarly journals Holographic quarkyonic matter

2020 ◽  
Vol 2020 (9) ◽  
Author(s):  
Nicolas Kovensky ◽  
Andreas Schmitt
Keyword(s):  
Nuclear Matter ◽  
Real World ◽  
Quark Matter ◽  
Chiral Limit ◽  
Pion Mass ◽  
Zero Temperature ◽  
Temperature Transition ◽  
Physical Point ◽  
First Order ◽  
Chemical Potentials

Abstract We point out a new configuration in the Witten-Sakai-Sugimoto model, allowing baryons in the pointlike approximation to coexist with fundamental quarks. The resulting phase is a holographic realization of quarkyonic matter, which is predicted to occur in QCD at a large number of colors, and possibly plays a role in real-world QCD as well. We find that holographic quarkyonic matter is chirally symmetric and that, for large baryon chemical potentials, it is energetically preferred over pure nuclear matter and over pure quark matter. The zero-temperature transition from nuclear matter to the quarkyonic phase is of first order in the chiral limit and for a realistic pion mass. For pion masses far beyond the physical point we observe a quark-hadron continuity due to the presence of quarkyonic matter.

scholarly journals Fate of pion condensation in quark matter: From the chiral limit to the physical pion mass

2009 ◽  
Vol 79 (3) ◽  
Author(s):  
H. Abuki ◽  
R. Anglani ◽  
R. Gatto ◽  
M. Pellicoro ◽  
M. Ruggieri
Keyword(s):  
Quark Matter ◽  
Chiral Limit ◽  
Pion Mass ◽  
Physical Pion ◽  
Pion Condensation

scholarly journals The chiral phase transition and the role of vacuum fluctuations

2016 ◽  
Vol 31 (07) ◽  
pp. 1650025 ◽  
Author(s):  
Rashid Khan ◽  
Jens O. Andersen ◽  
Lars T. Kyllingstad ◽  
Majid Khan
Keyword(s):  
Phase Transition ◽  
Effective Potential ◽  
Chemical Potential ◽  
Chiral Limit ◽  
Vacuum Fluctuations ◽  
Physical Point ◽  
Chiral Phase ◽  
First Order ◽  
First Order Transition

We apply optimized perturbation theory to the quark–meson model at finite temperature [Formula: see text] and quark chemical potential [Formula: see text]. The effective potential is calculated to one loop both in the chiral limit and at the physical point and used to study the chiral dynamics of two-flavor QCD. The critical temperature and the order of the phase transition depend heavily on whether or not one includes the bosonic and fermionic vacuum fluctuations in the effective potential. A full one-loop calculation in the chiral limit predicts a first-order transition for all values of [Formula: see text]. At the physical point, one finds a crossover in the whole [Formula: see text]–[Formula: see text] plane.

GENERALIZED HYBRID DERIVATIVE COUPLING MODEL WITH DILATON FIELD TO STUDY PHASE TRANSITION FROM NUCLEAR MATTER TO QUARK MATTER

1999 ◽  
Vol 14 (23) ◽  
pp. 3673-3686
Author(s):  
BINAY MALAKAR ◽  
SASABINDU SARKAR
Keyword(s):  
Phase Transition ◽  
Nuclear Matter ◽  
Quark Matter ◽  
Coupling Model ◽  
Study Phase ◽  
Zero Temperature ◽  
Dilaton Field ◽  
Total Energy Density ◽  
Derivative Coupling ◽  
Hybrid Derivative

The properties of isospin symmetric nuclear matter and its phase transition to quark matter at zero temperature have been investigated in the framework of generalized hybrid derivative coupling model by including the contribution of dilation field. We have compared the results of different models in presence and in absence of dilaton field. The effect of dilaton field becomes prominent as the density increases. The most striking feature of this work is that in presence of dilaton field the vector meson contribution to total energy density is approximately proportional to ρ4/3 instead of ρ2 when the density ρ is extremely high.

scholarly journals More on complex Sachdev-Ye-Kitaev eternal wormholes

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Pengfei Zhang
Keyword(s):  
Black Hole ◽  
Ground State ◽  
Effective Action ◽  
Chemical Potential ◽  
Specific Charge ◽  
Zero Temperature ◽  
Small Coupling ◽  
Chemical Potentials ◽  
Quench Dynamics ◽  
Two Sides

Abstract In this work, we study a generalization of the coupled Sachdev-Ye-Kitaev (SYK) model with U(1) charge conservations. The model contains two copies of the complex SYK model at different chemical potentials, coupled by a direct hopping term. In the zero-temperature and small coupling limit with small averaged chemical potential, the ground state is an eternal wormhole connecting two sides, with a specific charge Q = 0, which is equivalent to a thermofield double state. We derive the conformal Green’s functions and determine corresponding IR parameters. At higher chemical potential, the system transit into the black hole phase. We further derive the Schwarzian effective action and study its quench dynamics. Finally, we compare numerical results with the analytical predictions.

scholarly journals The pion quasiparticle in the low-temperature phase of QCD

2018 ◽  
Vol 175 ◽  
pp. 07045
Author(s):  
Bastian B. Brandt ◽  
Anthony Francis ◽  
Harvey B. Meyer ◽  
Daniel Robaina ◽  
Kai Zapp
Keyword(s):  
Low Temperature ◽  
Finite Temperature ◽  
Quark Mass ◽  
Pion Mass ◽  
Effective Theory ◽  
Temperature Phase ◽  
Zero Temperature ◽  
Low Temperature Phase

We extend our previous studies [PhysRevD.90.054509, PhysRevD.92.094510] of the pion quasiparticle in the low-temperature phase of two-flavor QCD with support from chiral effective theory. This includes the analysis performed on a finite temperature ensemble of size 20 × 643 at T ≈ 151MeV and a lighter zero-temperature pion mass mπ ≈ 185 MeV. Furthermore, we investigate the Gell-Mann–Oakes-Renner relation at finite temperature and the Dey-Eletsky-Ioffe mixing theorem at finite quark mass.

Quark Clustering and Chiral Symmetry Breaking in Nuclear Matter

2003 ◽  
Vol 18 (32) ◽  
pp. 2255-2264 ◽  
Author(s):  
O. A. Battistel ◽  
G. Krein
Keyword(s):  
Symmetry Breaking ◽  
Neutron Stars ◽  
Nuclear Matter ◽  
Chiral Symmetry ◽  
Quark Matter ◽  
Traditional Approach ◽  
Chiral Symmetry Breaking ◽  
Quark Condensate ◽  
Baryon Density ◽  
Hadronic Matter

Chiral symmetry breaking at finite baryon density is usually discussed in the context of quark matter, i.e. a system of deconfined quarks. Many systems like stable nuclei and neutron stars however have quarks confined within nucleons. In this paper we construct a Fermi sea of three-quark nucleon clusters and investigate the change of the quark condensate as a function of baryon density. We study the effect of quark clustering on the in-medium quark condensate and compare results with the traditional approach of modeling hadronic matter in terms of a Fermi sea of deconfined quarks.

A METAMAGNETIC QUANTUM CRITICAL ENDPOINT IN Sr3Ru2O7

2002 ◽  
Vol 16 (20n22) ◽  
pp. 3258-3264 ◽  
Author(s):  
S. A. GRIGERA ◽  
A. P. MACKENZIE ◽  
A. J. SCHOFIELD ◽  
S. R. JULIAN ◽  
G. G. LONZARICH
Keyword(s):  
Quantum Critical Point ◽  
Point Of View ◽  
Zero Temperature ◽  
Tuning Parameters ◽  
First Order ◽  
End Point ◽  
Fundamental Point ◽  
New Type ◽  
Quantum Critical ◽  
The Magnetic Field

In this paper, we discuss the concept of a metamagnetic quantum critical end-point, consequence of the depression to zero temperature of a critical end-point terminating a line of first order first transitions. This new type of quantum critical point (QCP) is interesting both from a fundamental point of view: a study of a symmetry conserving QCP, and because it opens the possibility of the use of symmetry breaking tuning parameters, notably the magnetic field. In addition, we discuss the experimental evidence for the existence of such a QCP in the bilayer ruthenate Sr3Ru2O7.

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