Possible ferromagnetism of dense quark matter

2018 ◽  
Vol 96 (11) ◽  
pp. 1163-1172
Author(s):  
Kausik Pal
Keyword(s):  
Phase Transition ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Single Particle ◽  
Ground State ◽  
Quark Matter ◽  
State Energy ◽  
Magnetic Instability ◽  
Dense Quark Matter ◽  
Spin Polarized

The cardinal focus of the present review is to investigate the possibility of the para-ferro phase transition of dense quark matter. For these, the calculation of the single-particle energies, ground state energy (GSE) densities, and spin susceptibility χ of degenerate quark matter with one gluon exchange interaction in terms of spin-dependent Landau parameters (LPs) have been presented. The expressions for the GSE and χ of cold and dense spin-polarized quark matter have been derived with corrections due to correlation. Furthermore, the magnetic properties of spin polarized quark matter have been discussed by evaluating the magnetization ⟨M⟩ and magnetic susceptibility χM in terms of LPs. Finally, the possibility of magnetic instability has been revealed by studying the density dependence of ⟨M⟩ and χM.

scholarly journals Ground state energy of spin polarized quark matter with correlation

2009 ◽  
Vol 80 (2) ◽  
Author(s):  
Kausik Pal ◽  
Subhrajyoti Biswas ◽  
Abhee K. Dutt-Mazumder
Keyword(s):  
Ground State Energy ◽  
Ground State ◽  
Quark Matter ◽  
State Energy ◽  
Spin Polarized

LOCV CALCULATIONS FOR POLARIZED LIQUID 3He: THE EFFECT OF THREE-BODY CLUSTER ENERGY

2011 ◽  
Vol 25 (17) ◽  
pp. 2355-2363 ◽  
Author(s):  
G. H. BORDBAR ◽  
S. MOHSENIPOUR ◽  
M. J. KARIMI
Keyword(s):  
Phase Transition ◽  
Magnetic Susceptibility ◽  
Ground State ◽  
State Energy ◽  
Ferromagnetic Phase ◽  
Energy Contribution ◽  
Ferromagnetic Phase Transition ◽  
Cluster Energy ◽  
Three Body ◽  
Body Energy

We have used the lowest order constrained variational (LOCV) method to calculate some of the ground state properties of the polarized liquid 3 He by inclusion of the three-body cluster energy contribution. It is shown that the contribution of the three-body cluster term for the ground state energy of this system is substantial, especially at high densities. It is also shown that the inclusion of the three-body energy contribution improves our result for the binding energy of the liquid 3 He . It is seen that the magnitude of the three-body cluster energy decreases by increasing the polarization. The magnetic susceptibility of the liquid 3 He has also been computed, showing no spontaneous ferromagnetic phase transition.

WANG–LANDAU SIMULATION ON THERMODYNAMIC AND MAGNETIC PROPERTIES OF HONEYCOMB LATTICE

2011 ◽  
Vol 25 (26) ◽  
pp. 3435-3442
Author(s):  
XIAOYAN YAO
Keyword(s):  
Magnetic Field ◽  
Monte Carlo Simulation ◽  
Magnetic Properties ◽  
Free Energy ◽  
Magnetic Susceptibility ◽  
Magnetic Property ◽  
Ground State ◽  
Antiferromagnetic Order ◽  
Honeycomb Lattice ◽  
Antiferromagnetic Ising Model

Wang–Landau algorithm of Monte Carlo simulation is performed to understand the thermodynamic and magnetic properties of antiferromagnetic Ising model on honeycomb lattice. The internal energy, specific heat, free energy and entropy are calculated to present the thermodynamic behavior. For magnetic property, the magnetization and magnetic susceptibility are discussed at different temperature upon different magnetic field. The antiferromagnetic order is confirmed to be the ground state of the system, and it can be destroyed by a large magnetic field.

SPIN-POLARIZED ATOMIC DEUTERIUM (↓D) IN THE STATIC FLUCTUATION APPROXIMATION (SFA)

2008 ◽  
Vol 22 (03) ◽  
pp. 257-266 ◽  
Author(s):  
A. S. SANDOUQA ◽  
B. R. JOUDEH ◽  
M. K. AL-SUGHEIR ◽  
H. B. GHASSIB
Keyword(s):  
Ground State Energy ◽  
Ground State ◽  
State Energy ◽  
Ideal Gas ◽  
Hard Sphere Model ◽  
Spin Polarized ◽  
Static Fluctuation Approximation ◽  
Static Fluctuation ◽  
Type Potential ◽  
The Ideal

Spin-polarized atomic deuterium (↓D) is investigated in the static fluctuation approximation with a Morse-type potential. The thermodynamic properties of the system are computed as functions of temperature. In addition, the ground-state energy per atom is calculated for the three species of ↓D : ↓D 1, ↓D 2, and ↓D 3. This is then compared to the corresponding ground-state energy per atom for the ideal gas, and to that obtained by the perturbation theory of the hard sphere model. It is deduced that ↓D is nearly ideal.

Thermal and magnetic properties of ferric methylammonium sulphate

1956 ◽  
Vol 237 (1210) ◽  
pp. 404-412 ◽  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Specific Heat ◽  
Magnetic Anomaly ◽  
Ground State ◽  
Magnetic Contribution ◽  
Lattice Contribution ◽  
Magnetic Cooling ◽  
Maximum Value ◽  
Other Substances

The specific heat and magnetic susceptibility of ferric methylammonium sulphate have been measured at temperatures between 0·17 and 20°K. The specific heat has been analyzed into a lattice contribution and a magnetic anomaly. It is shown that the magnetic contribution to the specific heat can be accounted for almost entirely by the Schottky anomaly due to the Stark splittings of the ground state of the Fe 3+ ions, previously determined by Bleaney & Trenam. These splittings are unusually large in this salt, with the result that the specific heat is very large at temperatures near 1°K, reaching a maximum value of 1·1 cal/mole at 0·33°K. The salt should therefore be useful for magnetic cooling experiments in which other substances are to be kept below 1°K for prolonged periods.

scholarly journals COLOR SUPERCONDUCTIVITY AT MODERATE BARYON DENSITY

2005 ◽  
Vol 14 (05) ◽  
pp. 675-738 ◽  
Author(s):  
MEI HUANG
Keyword(s):  
Phase Transition ◽  
Ground State ◽  
Coupling Strength ◽  
Quark Matter ◽  
Chiral Condensate ◽  
Baryon Density ◽  
Superconducting Phase ◽  
Chiral Phase ◽  
Charge Neutrality ◽  
Neutrality Condition

This article focuses on the two-flavor color superconducting phase at moderate baryon density. In order to simultaneously investigate the chiral phase transition and the color superconducting phase transition, the Nambu–Gorkov formalism is extended to treat the quark-antiquark and diquark condensates on an equal footing. The competition between the chiral condensate and the diquark condensate is analyzed. The cold dense charge neutral two-flavor quark system is investigated in detail. Under the local charge neutrality condition, the ground state of two-flavor quark matter is sensitive to the coupling strength in the diquark channel. When the diquark coupling strength is around the value obtained from the Fierz transformation or from fitting the vacuum bayron mass, the ground state of charge neutral two-flavor quark matter is in a thermal stable gapless 2SC (g2SC) phase. The unusual properties at zero as well as nonzero temperatures and the chromomagnetic properties of the g2SC phase are reviewed. Under the global charge neutrality condition, assuming the surface tension is negligible, the mixed phase composed of the regular 2SC phase and normal quark matter is more favorable than the g2SC phase. A hybrid nonstrange neutron star is constructed.

scholarly journals Collective excitations, instabilities, and the ground state in dense quark matter

2006 ◽  
Vol 73 (11) ◽  
Author(s):  
E. V. Gorbar ◽  
Michio Hashimoto ◽  
V. A. Miransky ◽  
I. A. Shovkovy
Keyword(s):  
Ground State ◽  
Quark Matter ◽  
Collective Excitations ◽  
Dense Quark Matter

scholarly journals Magnetic properties of two-dimensional nanodots: Ground state and phase transition

AIP Advances ◽  
2013 ◽  
Vol 3 (12) ◽  
pp. 122121 ◽  
Author(s):  
Maciej Kasperski ◽  
Henryk Puszkarski ◽  
Danh-Tai Hoang ◽  
H. T. Diep
Keyword(s):  
Phase Transition ◽  
Magnetic Properties ◽  
Ground State ◽  
Two Dimensional
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