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Holographic dark energy (HDE), presents a dynamical view of dark energy which is consistent with the observational data and has a solid theoretical background. Its definition follows from the entropy-area relation S(A), where S and A are entropy and area respectively. In the framework of loop quantum gravity, a modified definition of HDE called “entropy-corrected holographic dark energy” (ECHDE) has been proposed recently to explain dark energy with the help of quantum corrections to the entropy-area relation. Using this new definition, we establish a correspondence between modified variable Chaplygin gas, new modified Chaplygin gas and the viscous generalized Chaplygin gas with the entropy corrected holographic dark energy and reconstruct the corresponding scalar potentials which describe the dynamics of the scalar field.  相似文献
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In this paper, we have constructed a (2+1)-dimensional wormhole using inhomogeneous and anisotropic distribution of phantom energy. We have determined the exact form of the equation of state of phantom energy that supports the wormhole structure. Interestingly, this equation of state is linear but variable one and is dependent only on the radial parameter of the model.  相似文献
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In this paper, the model of the holographic Chaplygin gas has been extended to two general cases: first the case of a modified variable Chaplygin gas and second the case of the viscous generalized Chaplygin gas. The dynamics of the model is expressed by the use of scalar fields and scalar potentials.  相似文献
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We have examined the possible construction of a stationary, spherically symmetric and spatially inhomogeneous wormhole spacetime supported by the phantom energy. The latter is supposed to be represented by the modified Chaplygin gas equation of state. The solutions so obtained satisfy the flare-out and the asymptotic-flatness conditions. It is also shown that the averaged null-energy condition has to be violated for the existence of the wormhole.  相似文献
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We consider the new agegraphic dark energy model with the help of the quantum corrections to the entropy-area relation in the setup of loop quantum gravity. Employing this new form of dark energy so called entropy-corrected new agegraphic dark energy (ECNADE), we investigate the model of interacting dark energy and derive its equation of state (EoS). We study the correspondence between the K-essence, tachyon and dilaton scalar fields with the interacting (ECNADE)in the non-flat FRW universe. Moreover, we reconstruct the corresponding scalar potentials which describe the dynamics of the scalar field.  相似文献
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本文利用尺寸选择的负离子光电子能谱和理论计算探索Au2Gen-/0 (n=1∽8)团簇的结构演化和电子性质. 通过比较理论模拟谱与实验谱,并使用CCSD(T)理论方法计算异构体的相对能量,从而确定金锗混合团簇的全局最小结构. 本文发现Au2Gen-/0 (n=1∽8)团簇的两个Au原子具有较高的配位数和较弱的亲金相互作用. 负离子团簇和中性团簇的最稳定结构分别处于自旋双重态和自旋单重态. 除了Au2Ge4-/0和Au2Ge5-/0,负离子团簇和中性团簇的全局最小结构具有相似的结构特点. Au2Ge1-/0团簇是一个C2v对称的V形结构,而Au2Ge2-/0团簇是一个C2v对称的双桥连结构. Au2Ge1-负离子团簇是两个Au原子盖帽的Ge4四面体结构,而Au2Ge4中性团簇是两个Au原子盖帽的Ge4菱形结构. Au2Ge5∽8-/0团簇主要采用三棱柱、四棱柱、及五棱柱结构. Au2Ge6是一个C2v对称的四棱柱结构,并表现出σ和π双键性质.  相似文献
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