Dynamics of quintom and hessence energies in loop quantum cosmology

被引:46
作者
Wei, Hao [1 ]
Zhang, Shuang Nan
机构
[1] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China
[2] Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing 100084, Peoples R China
[3] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China
[4] Univ Alabama, Dept Phys, Huntsville, AL 35899 USA
关键词
HOLOGRAPHIC DARK ENERGY; PROBE WMAP OBSERVATIONS; BLACK-HOLE ENTROPY; CONSTRAINTS; MODEL; CONSTANT; SUPERNOVAE; INFLATION; GEOMETRY; EQUATION;
D O I
10.1103/PhysRevD.76.063005
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
In the present work, we investigate the universe dominated by quintom or hessence energies in loop quantum cosmology (LQC). Interestingly enough, we find that there are some stable attractors in these two cases. In the case of quintom, all stable attractors have the feature of decelerated expansion. In the case of hessence, most of stable attractors have the feature of decelerated expansion while one stable attractor can have decelerated or accelerated expansion depend on the model parameter. In all cases, the equation-of-state parameter (EoS) of all stable attractors are larger than -1 and there is no singularity in the finite future. These results are different from the dynamics of phantom in LQC, or the ones of phantom, quintom, and hessence in classical Einstein gravity.
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页数:8
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