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arXiv 1609.04428gr-qc
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GR的哈密顿方法.第2部分:量子引力的协变理论

Hamiltonian approach to GR - Part 2: covariant theory of quantum gravity

Claudio Cremaschini, Massimo Tessarotto

摘要:

本文提出了一种非微扰的广义相对论量子场论,它使协变量子引力理论(CQG理论)得到了新的实现。这种处理是建立在最近确定的与经典时空相关联的哈密顿结构上的,即,相应的显协变Hamilton方程和相关的Hamilton-Jacobi理论。在$% 4-$标量形式下实现了量子哈密顿算符和相应的CQG-态和波函数的CQG-波方程。新的量子波动方程等价于一组量子流体动力学方程,保证了与经典GR Hamilton-Jacobi方程在半经典极限下的一致性。发展了一种微扰近似方案,该方案允许采用谐振子近似来处理哈密顿势。作为该理论的应用,研究了定态真空CQG波方程,得到了一个用$4-$标量不变能量本征值和相应的近似量子哈密顿算符表示的CQG态定态方程.指出了离散不变能谱存在的条件。这就产生了引力子质量的一个可能的估计,以及关于宇宙学常数的量子起源的一个新的解释。

英文摘要:

A non-perturbative quantum field theory of General Relativity is presented which leads to a new realization of the theory of Covariant Quantum-Gravity (CQG-theory). The treatment is founded on the recently-identified Hamiltonian structure associated with the classical space-time, i.e., the corresponding manifestly-covariant Hamilton equations and the related Hamilton-Jacobi theory. The quantum Hamiltonian operator and the CQG-wave equation for the corresponding CQG-state and wave-function are realized in $% 4-$scalar form. The new quantum wave equation is shown to be equivalent to a set of quantum hydrodynamic equations which warrant the consistency with the classical GR Hamilton-Jacobi equation in the semiclassical limit. A perturbative approximation scheme is developed, which permits the adoption of the harmonic oscillator approximation for the treatment of the Hamiltonian potential. As an application of the theory, the stationary vacuum CQG-wave equation is studied, yielding a stationary equation for the CQG-state in terms of the $4-$scalar invariant-energy eigenvalue associated with the corresponding approximate quantum Hamiltonian operator. The conditions for the existence of a discrete invariant-energy spectrum are pointed out. This yields a possible estimate for the graviton mass together with a new interpretation about the quantum origin of the cosmological constant.

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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