scholarly journals Classical and loop quantum cosmology phase space of interacting dark energy and superfluid dark matter

2019 ◽  
Vol 99 (10) ◽  
Author(s):  
V. K. Oikonomou
Keyword(s):  
Dark Matter ◽  
Dark Energy ◽  
Phase Space ◽  
Quantum Cosmology ◽  
Loop Quantum Cosmology ◽  
Interacting Dark Energy

scholarly journals DYNAMICAL BEHAVIOR OF INTERACTING DARK ENERGY IN LOOP QUANTUM COSMOLOGY

2010 ◽  
Vol 25 (26) ◽  
pp. 4993-5007 ◽  
Author(s):  
KUI XIAO ◽  
JIAN-YANG ZHU
Keyword(s):  
Dark Energy ◽  
Fixed Points ◽  
Quantum Cosmology ◽  
Dynamical Behavior ◽  
Friedmann Equation ◽  
Loop Quantum Cosmology ◽  
Dynamical Equations ◽  
Interacting Dark Energy ◽  
Dynamical Behaviors ◽  
The Difference

The dynamical behaviors of interacting dark energy in loop quantum cosmology are discussed in this paper. Based on three defined dimensionless variables, we simplify the equations of the fixed points. The fixed points for interacting dark energy can be determined by the Friedmann equation coupled with the dynamical equations in Einstein cosmology. But in loop quantum cosmology, besides the Friedmann equation, the conversation equation also gives a constrain on the fixed points. The difference of stability properties for the fixed points in loop quantum cosmology and the ones in Einstein cosmology are also discussed.

scholarly journals THERMODYNAMICS OF INTERACTING ENTROPY-CORRECTED HOLOGRAPHIC DARK ENERGY IN A NON-FLAT FRW UNIVERSE

2010 ◽  
Vol 19 (11) ◽  
pp. 1831-1842 ◽  
Author(s):  
MUBASHER JAMIL ◽  
AHMAD SHEYKHI ◽  
M. UMAR FAROOQ
Keyword(s):  
Dark Matter ◽  
Dark Energy ◽  
Energy Conservation ◽  
Quantum Cosmology ◽  
Holographic Dark Energy ◽  
Thermal Fluctuation ◽  
Quantum Corrections ◽  
Loop Quantum Cosmology ◽  
Frw Universe ◽  
Interaction Term

An entropy-corrected holographic dark energy (ECHDE) was recently proposed to explain the dark energy-dominated universe with the help of quantum corrections to the entropy–area relation in the setup of loop quantum cosmology. Using this new definition, we investigate its thermodynamical features including entropy and energy conservation. We describe the thermodynamical interpretation of the interaction between ECHDE and dark matter in a non-flat universe. We obtain a relation between the interaction term of the dark components and thermal fluctuation. Our study further generalizes the earlier works86, 87 in this direction.

The evolutionary pictures for phantom field in loop quantum cosmology

2019 ◽  
Vol 28 (15) ◽  
pp. 1950170
Author(s):  
Kui Xiao
Keyword(s):  
Dark Matter ◽  
Quantum Cosmology ◽  
Scalar Fields ◽  
Chaplygin Gas ◽  
Loop Quantum Cosmology ◽  
Phantom Field ◽  
Dynamical Behaviors ◽  
Slow Roll ◽  
The Universe ◽  
Slow Roll Inflation

The evolutionary pictures for phantom field in loop quantum cosmology are discussed in this paper. Comparing the dynamical behaviors of the phantom field with one of the canonical scalar fields in loop quantum cosmology scenario, we found that the [Formula: see text] phase trajectories are the same, but the [Formula: see text] phase-spaces are very different, and the phantom field with considering potentials can drive neither super inflation nor slow-roll inflation in loop quantum cosmology (LQC) scenario. While the universe is filled with multiple dark fluids, to ensure that the condition [Formula: see text] does not violate, the energy density of dark matter [Formula: see text] and the equation-of-state of phantom field [Formula: see text] should satisfy the condition [Formula: see text] at the bounce point. If this constraint condition holds, the universe can enter an inflationary stage, and it is possible to unify the description of phantom field, dark matter and inflation. We introduced a toy model which has the same form of the general Chaplygin gas to unify the dark energy, dark matter and slow-roll inflation, and the slow-roll inflation of the toy model has also been discussed.

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