The quark–gluon phase in strong interacting matter

1982 ◽  
Vol 60 (6) ◽  
pp. 797-801 ◽  
Author(s):  
R. Gagnon
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
Critical Temperature ◽  
Chemical Equilibrium ◽  
Hadronic Phase ◽  
Chemical Potentials ◽  
Valence Number

A system of free quarks and gluons in thermal and in chemical equilibrium has been investigated in the context of hadronic phase transitions. The dependence on temperature of various quantities (i.e., chemical potentials and number and energy densities) was obtained. Calculations of number and energy densities at a given critical temperature have been performed for different valence number densities. A brief discussion of a phase transition occurring in the laboratory is also given.

Two Species/Nonideal Solution Model for Amorphous/Amorphous Phase Transitions

1996 ◽  
Vol 455 ◽  
Author(s):  
Cornelius T. Moynihan
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
Critical Temperature ◽  
Amorphous Phase ◽  
Thermodynamic Model ◽  
Critical Pressure ◽  
Solution Model ◽  
Amorphous Phases ◽  
First Order ◽  
Temperature And Pressure

ABSTRACTA simple macroscopic thermodynamic model for first order transitions between two amorphous phases in a one component liquid is reviewed, augmented and evaluated. The model presumes the existence in the liquid of two species, whose concentrations are temperature and pressure dependent and which form a solution with large, positive deviations from ideality. Application of the model to recent data indicates that water can undergo an amorphous/amorphous phase transition below a critical temperature Tc of 217K and above a critical pressure Pc of 380 atm.

Two-Dimensional Phase Transitions Associated with a Surface Miscibility Gap in Cu-Ag Alloys

1990 ◽  
Vol 202 ◽  
Author(s):  
Y. Liu ◽  
P. Wynblatt
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
Critical Temperature ◽  
Abrupt Change ◽  
Surface Composition ◽  
Bulk Composition ◽  
Miscibility Gap ◽  
Experimental Measurements ◽  
Two Dimensional ◽  
Surface Phase

ABSTRACTA surface phase transition associated with a surface miscibility gap has been observed on the (111) surface of Cu-Ag alloys both in computer simulations and in experimental measurements of surface composition. This transition is characterized by an abrupt change in surface composition associated with changes in either bulk composition or temperature.The simulations have revealed that the transition from a Cu-rich to a Ag-rich surface phase is accompanied by interesting changes in surface structure. The experiments show that the surface critical temperature lies somewhere between 505 and 560°C.

scholarly journals Chiral phase transition in QED3 at finite temperature

2016 ◽  
Vol 31 (36) ◽  
pp. 1650198
Author(s):  
Pei-Lin Yin ◽  
Hai-Xiao Xiao ◽  
Wei Wei ◽  
Hong-Tao Feng ◽  
Hong-Shi Zong
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
Critical Temperature ◽  
Finite Temperature ◽  
Chiral Symmetry Breaking ◽  
Chiral Condensate ◽  
The Other ◽  
Thermodynamic Quantities ◽  
Chiral Phase ◽  
Chiral Phase Transition

In the framework of Dyson–Schwinger equations, we employ two kinds of criteria (one kind is the chiral condensate, the other kind is thermodynamic quantities, such as the pressure, the entropy, and the specific heat) to investigate the nature of chiral phase transitions in QED3 for different fermion flavors. It is found that the chiral phase transitions in QED3 for different fermion flavors are all typical second-order phase transitions; the critical temperature and order of the chiral phase transition obtained from the chiral condensate and susceptibility are the same with that obtained by the thermodynamic quantities, which means that they are equivalent in describing the chiral phase transition; the critical temperature decreases as the number of fermion flavors increases and there is a boundary that separates the [Formula: see text] plane into chiral symmetry breaking and restoration regions.

SURFACE EFFECTS ON THE PHASE TRANSITIONS

1992 ◽  
Vol 06 (14) ◽  
pp. 2531-2547 ◽  
Author(s):  
G. BARBERO ◽  
T. BEICA ◽  
R. MOLDOVAN ◽  
A. STEPANESCU
Keyword(s):  
Experimental Data ◽  
Phase Transition ◽  
Surface Tension ◽  
Phase Transitions ◽  
Critical Temperature ◽  
Surface Energy ◽  
Order Parameter ◽  
Multilayer Model ◽  
Classical Models ◽  
New Form

The influence of the surface on the phase transitions is discussed. Classical models are reviewed and critically analyzed. Starting with a multilayer model, a new form of the surface energy is proposed. Our model predicts, contrary to previous models, a surface order parameter different from zero in a temperature range above the critical temperature characterizing the bulk phase transition. The application of the model to the evaluation of the surface tension gives results in agreement with experimental data.

scholarly journals OUT OF EQUILIBRIUM PHASE TRANSITIONS AND A TOY MODEL FOR DISORIENTED CHIRAL CONDENSATES

1993 ◽  
Vol 08 (33) ◽  
pp. 3151-3163 ◽  
Author(s):  
PAULO F. BEDAQUE ◽  
ASHOK DAS
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
Critical Temperature ◽  
Symmetry Breaking ◽  
Order Phase Transition ◽  
Equilibrium Phase ◽  
Dynamical Symmetry ◽  
Disoriented Chiral Condensates ◽  
Model Independent ◽  
Second Order Phase Transition

We study the dynamics of a second order phase transition in a situation that mimics a sudden quench to a temperature below the critical temperature in a model with dynamical symmetry breaking. In particular we show that the domains of correlated values of the condensate grow as [Formula: see text] and that this result seems to be largely model-independent.

scholarly journals ON THE THERMAL PHASE STRUCTURE OF QCD AT VANISHING CHEMICAL POTENTIALS

2011 ◽  
Vol 26 (18) ◽  
pp. 3035-3050 ◽  
Author(s):  
SONIA KABANA ◽  
PETER MINKOWSKI
Keyword(s):  
Phase Transition ◽  
Critical Temperature ◽  
Energy Density ◽  
Order Parameter ◽  
Thermal Structure ◽  
Boson Pair ◽  
Chemical Potentials ◽  
Consistent Model ◽  
Thermal Phase ◽  
Second Order Phase Transition

The hypothesis is investigated, that the thermal structure of QCD phases at and near zero chemical potentials is determined by long range coherence, inducing the gauge boson pair condensate, and its thermal extension, representing a fundamental order parameter. A consistent model for thermal behavior including interactions is derived in which the condensate does not produce any latent heat as it vanishes at the critical temperature inducing a second-order phase transition with respect to energy density neglecting eventual numerically small critical exponents. Localization and delocalization of color fields are thus separated by a unique critical temperature.

scholarly journals Quantum phase transitions of strongly correlated metals

2020 ◽  
pp. 6-13
Author(s):  
Martha Yolima Suárez Villagrán ◽  
Nikolaos Mitsakos ◽  
John H. Miller Jr
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
Critical Temperature ◽  
Quantum Phase Transition ◽  
Open Problem ◽  
Quantum Phase Transitions ◽  
Quantum Phase ◽  
Strongly Correlated ◽  
Made In

In this article, we discuss several aspects of the quantum phase transition, with special emphasis on the metalinsulator transition. We start with a review of key experimental and theoretical works and then discuss how doping a system reduces the critical temperature of the overall phase transition. Although many aspects of the quantum phase transition still remain an open problem, onsiderable progress has been made in revealing the underlying physics, both theoretically and experimentally.

scholarly journals Spherical model and quantum phase transitions

2021 ◽  
Vol 2094 (2) ◽  
pp. 022027
Author(s):  
V N Udodov
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
Critical Temperature ◽  
Critical Exponents ◽  
Quantum Phase Transitions ◽  
Dimensional Space ◽  
Spherical Model ◽  
Quantum Phase ◽  
Two Dimensional ◽  
Epsilon Expansion

Abstract The spherical Berlin-Katz model is considered in the framework of the epsilon expansion in one-dimensional and two-dimensional space. For the two-dimensional and threedimensional cases in this model, an exact solution was previously obtained in the presence of a field, and for the two-dimensional case the critical temperature is zero, that is, a “quantum” phase transition is observed. On the other hand, the epsilon expansion of critical exponents with an arbitrary number of order parameter components is known. This approach is consistent with the scaling paradigm. Some critical exponents are found for the spherical model in one-and twodimensional space in accordance with the generalized scaling paradigm and the ideas of quantum phase transitions. A new formula is proposed for the critical heat capacity exponent, which depends on the dynamic index z, at a critical temperature equal to zero. An expression is proposed for the order of phase transition with a change in temperature (developing the approach of R. Baxter), which also depends on the z index. An interpolation formula is presented for the effective dimension of space, which is valid for both a positive critical temperature and a critical temperature equal to zero. This formula is general. Transitions with a change in the field in a spherical model at absolute zero are also considered.

scholarly journals Holographic subregion complexity in metal/superconductor phase transition with Born–Infeld electrodynamics

2020 ◽  
Vol 80 (12) ◽  
Author(s):  
Yu Shi ◽  
Qiyuan Pan ◽  
Jiliang Jing
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
Critical Temperature ◽  
Inflection Point ◽  
Entanglement Entropy ◽  
Superconducting Phase ◽  
Holographic Entanglement Entropy ◽  
Good Probe

AbstractWe investigate the holographic subregion complexity (HSC) and compare it with the holographic entanglement entropy (HEE) in the metal/superconductor phase transition for the Born–Infeld (BI) electrodynamics with full backreaction. Based on the subregion CV conjecture, we find that the universal terms of HSC remain finite during phase transitions, and the HSC is a good probe to the critical temperature in the holographic superconducting system. Furthermore, we observe that for the operator $$\mathcal {O}_{+}$$ O + , the HSC of the superconducting phase decreases first and then increases as the BI parameter increases, which is completely different from that of HEE, and the value of the BI parameter corresponding to the inflection point of HSC is larger than that of HEE. But for the operator $$\mathcal {O}_{-}$$ O - , the HSC increases monotonically as the BI parameter increases, which is similar to that of HEE.

scholarly journals Gravitational phase transition mediated by thermalon in Einstein-Gauss-Bonnet-Maxwell-Kalb-Ramond gravity

2020 ◽  
Vol 2020 (8) ◽  
Author(s):  
Daris Samart ◽  
Phongpichit Channuie
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
Critical Temperature ◽  
Canonical Ensemble ◽  
Electrical Potential ◽  
Bubble Nucleation ◽  
Thin Shells ◽  
Form Field ◽  
The One ◽  
Grand Canonical

Abstract In this work, we study the possible existence of gravitational phase transition from AdS to dS asymptotic geometries in Einstein-Gauss-Bonnet gravity by adding the Maxwell one-form field (Aμ) and the Kalb-Ramond two-form field (Bμν) as impurity substitutions. The phase transitions proceed via the bubble nucleation of spherical thin-shells described by different branches of the solutions which host a dS black hole in the interior and asymptotic thermal AdS state in the exterior. We analyze the phase diagrams of the free energy and temperature to demonstrate the existence of the phase transitions in the grand canonical ensemble (fixed electrical potential). The phase transitions of having the one-form and two-form charges are possible in which the critical temperature is lower than that of the neutral case. Comparing results with existing literature, more importantly, our analyses show that the critical temperature and the Gauss-Bonnet coupling λ of the phase transitions get decreased by adding more types of the charges.

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