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arXiv 1902.02188gr-qc
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迈向半经典引力的新方法

Towards a novel approach to semi-classical gravity

Ward Struyve

摘要:

半经典引力是对量子引力的一种近似,其中引力被经典地处理,物质被量子力学地处理。物质由弯曲时空上的量子场论描述,而引力则由满足爱因斯坦场方程的时空度规描述。在半经典引力的通常方法中,爱因斯坦场方程中的物质源项由能量动量张量算符的期望值给出。在本文中,我们提出了一种替代方法的基础上Bohmian力学。在玻姆力学中,量子系统由实际配置描述(例如,实际的标量场),其在波函数的影响下演化。这个想法是考虑对应于这种配置的实际能量-动量张量作为爱因斯坦场方程中的物质源项。预计这一办法将比通常的办法有所改进。

英文摘要:

Semi-classical gravity is an approximation to quantum gravity where gravity is treated classically and matter quantum mechanically. Matter is described by quantum field theory on curved space-time, whereas gravity is described by a space-time metric which satisfies Einstein's field equations. In the usual approach to semi-classical gravity, the matter source term in Einstein's field equations is given by the expectation value of the energy-momentum tensor operator. In this paper, we suggest an alternative approach based on Bohmian mechanics. In Bohmian mechanics, a quantum system is described by an actual configuration (e.g., an actual scalar field), which evolves under the influence of the wave function. The idea is to consider the actual energy-momentum tensor corresponding to this configuration as the matter source term in Einstein's field equations. This approach is expected to improve upon the usual approach.

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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