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84 papers · 1 filter
Thermodynamics in Loop Quantum Cosmology
Li-Fang Li, Jian-Yang Zhu
Loop quantum cosmology (LQC) is very powerful to deal with the behavior of early universe. And the effective loop quantum cosmology gives a successful description of the universe i…
Averaged null energy condition in Loop Quantum Cosmology
Li-Fang Li, Jian-Yang Zhu
Wormhole and time machine are very interesting objects in general relativity. However, they need exotic matters which are impossible in classical level to support them. But if we i…
The Principle of Relativity, Kinematics and Algebraic Relations
Han-Ying Guo, Chao-Guang Huang, Hong-Tu Wu +1
Based on the principle of relativity and the postulate on universal invariant constants (c,l), all possible kinematics can be set up with sub-symmetries of the Umov-Weyl-Fock trans…
Toward understanding the 3.4 micron and 9.7 micron extinction feature variations from the local diffuse interstellar medium to the Galactic center
Jian Gao, B. W. Jiang, Aigen Li
Observationally, both the 3.4micron aliphatic hydrocarbon C--H stretching absorption feature and the 9.7micron amorphous silicate Si--O stretching absorption feature show considera…
The 21 micron and 30 micron circumstellar dust features in evolved C-rich objects
B. W. Jiang, Ke Zhang, Aigen Li
The 21micron and 30micron bands are the strongest dust emission features detected in evolved low- and intermediate-mass C-rich stars (i.e. asymptotic giant branch [AGB] stars, prot…
Critical comments on the paper "Crossing by a single scalar field on a Dvali-Gabadadze-Porrati brane" by H Zhang and Z-H Zhu [Phys.Rev.D75,023510(2007)]
Israel Quiros, Ricardo Garcia-Salcedo, Claudia Moreno
It is demonstrated that the claim in the paper "Crossing by a single scalar field on a Dvali-Gabadadze-Porrati brane" by H Zhang and Z-H Zhu [Phys.Rev.D75,023510(2007)], abo…