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Ling, Y; Ling, Y , CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China.
Discrete gravity and its continuum limit
发表期刊MODERN PHYSICS LETTERS A
摘要Recently Gambini and Pullin proposed a new consistent discrete approach to quantum gravity and applied it to cosmological models. One remarkable result of this approach is that the cosmological singularity can be avoided in a general fashion. However, whether the continuum limit of such discretized theories exists is model dependent. In the case of massless scalar field coupled to gravity with Lambda = 0, the continuum limit can only be achieved by fine tuning the recurrence constant. We regard this failure as the implication that cosmological constant should vary with time. For this reason we replace the massless scalar field by Chaplygin gas which may contribute an effective cosmological constant term with the evolution of the universe. It turns out that the continuum limit can indeed be reached in this case.
2005
ISSN0217-7323
卷号20期号:3页码:213-225
学科领域Physics
收录类别SCI
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13896
专题理论物理所科研产出_SCI论文
通讯作者Ling, Y , CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China.
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GB/T 7714
Ling, Y,Ling, Y , CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China.. Discrete gravity and its continuum limit[J]. MODERN PHYSICS LETTERS A,2005,20(3):213-225.
APA Ling, Y,&Ling, Y , CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China..(2005).Discrete gravity and its continuum limit.MODERN PHYSICS LETTERS A,20(3),213-225.
MLA Ling, Y,et al."Discrete gravity and its continuum limit".MODERN PHYSICS LETTERS A 20.3(2005):213-225.
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