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arXiv 0808.3765hep-th
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变形的狭义相对论会自然地产生于量子引力的半经典极限吗?

Could deformed special relativity naturally arise from the semiclassical limit of quantum gravity?

Lee Smolin

摘要:

一个参数是如何变形或双狭义相对论可能会出现在半经典极限的量子理论的重力。我们考虑一个一般的引力耦合到物质的量子理论,我们只使用一个假设,即一个哈密顿约束。我们研究的情况下,λ,G和hbar都可以单独忽略,但可能会出现的条款,在粒子能量的比例,普朗克质量是小的,但可测量的。这种情况包括探测与能量有关的光速,例如在MAGIC和GLAST等实验中是可能的。我们证明,在这种情况下,如果满足一定的标度关系,量子引力的首阶效应将使物质量子场论的有效哈密顿量中的度规变形为能量线性项。由于已经施加了哈密顿约束,所以不可能有优选的时间坐标或参考系,因此这是对狭义相对论的修改而不是破坏。

英文摘要:

A argument is described for how deformed or doubly special relativity may arise in the semiclassical limit of a quantum theory of gravity. We consider a generic quantum theory of gravity coupled to matter, from which we use only the assumption that a Hamiltonian constraint is imposed. We study circumstances in which Lambda, G and hbar all may be separately neglected, but there may arise terms in the ratio of particle energies to the Planck mass which are small but measurable. Such cases include probes of an energy dependent speed of light such as are possible in experiments such as MAGIC and GLAST. We show that in such cases the leading order effect of quantum gravity will, if certain scaling relations are satisfied, be to deform the metric in the effective Hamiltonian of the matter quantum field theory by terms linear in energies. As the Hamiltonian constraint has been imposed there can be no preferred time coordinate or frame of reference, hence this is a modification rather than a breaking of special relativity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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