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arXiv 0807.3176gr-qchep-th
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De Sitter不变性与引力的一种可能机制

De Sitter Invariance and a Possible Mechanism of Gravity

Felix Lev

摘要:

人们相信,当人们成功地消除了大动量或小距离的发散时,引力将在现有的量子理论的框架内得到解释(尽管引力现象只在非相对论性动量和大距离上被观察到)。我们考虑在德西特不变量量子理论中对两个自由粒子系统的量子力学描述(即本文只包含两体德西特运动学)。在我们的纯代数方法中,宇宙学常数的问题不会出现。结果表明,只有当宇宙学常数不太小时,系统才能同时具有相对动量和能量的准经典性质。我们显式地构造相对距离算子。相应的本征向量在大动量和小动量上都不同于标准本征向量。在大动量时,它们保证了准经典波函数的快速收敛。小动量也有非常大(但有限)的贡献,这是宇宙学常数有限的结果。我们认为,重力可能是这种贡献的表现。

英文摘要:

It is believed that gravity will be explained in the framework of the existing quantum theory when one succeeds in eliminating divergencies at large momenta or small distances (although the phenomenon of gravity has been observed only at nonrelativistic momenta and large distances). We consider a quantum-mechanical description of systems of two free particles in de Sitter invariant quantum theory (i.e. the paper contains nothing but the two-body de Sitter kinematics). In our pure algebraic approach the cosmological constant problem does not arise. It is shown that a system can be simultaneously quasiclassical in relative momentum and energy only if the cosmological constant is not anomalously small. We explicitly construct the relative distance operator. The corresponding eigenvectors differ from standard ones at both, large and small momenta. At large momenta they ensure fast convergence of quasiclassical wave functions. There also exists an anomalously large (but finite) contribution from small momenta, which is a consequence of the fact that the cosmological constant is finite. We argue that gravity might be a manifestation of this contribution.

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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