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arXiv 2008.09430gr-qchep-th
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用引力耦合近似序列实现与背景无关的场量子化

Background Independent Field Quantization with Sequences of Gravity-Coupled Approximants

Maximilian Becker, Martin Reuter

摘要:

我们概述,测试,并应用一个新的计划与动态引力接触的量子化场系统的非微扰分析。虽然引力在本文中被经典地处理,但这种方法适合于推广到完全的量子引力。我们主张的观点,量子场论应正规化的准物理系统,包括一个明确定义的领域的自由度的数量序列。依赖于这个数字,每个系统对引力场的反作用是自主的和自洽的。在这种方法中,去除正则化的限制自动生成物理上正确的时空几何,即,场的量子态喜欢“生活”在其中的度量。我们将该方案应用于最大对称时空上的高斯标量场,从而使其与标准方法相对抗。作为应用,这些结果被用来解释量子物质场真空涨落引起的宇宙学常数问题。一个显式计算表明,这个问题消失,如果有关的连续极限是在这里提倡的改进方法进行。进一步的应用涉及德西特空间的热力学,其中该方法提供了由贝肯斯坦-霍金熵计数的微观状态的自然解释。

英文摘要:

We outline, test, and apply a new scheme for nonpertubative analyses of quantized field systems in contact with dynamical gravity. While gravity is treated classically in the present paper, the approach lends itself for a generalization to full Quantum Gravity. We advocate the point of view that quantum field theories should be regularized by sequences of quasi-physical systems comprising a well defined number of the field's degrees of freedom. In dependence on this number, each system backreacts autonomously and self-consistently on the gravitational field. In this approach, the limit which removes the regularization automatically generates the physically correct spacetime geometry, i.e., the metric the quantum states of the field prefer to "live" in. We apply the scheme to a Gaussian scalar field on maximally symmetric spacetimes, thereby confronting it with the standard approaches. As an application, the results are used to elucidate the cosmological constant problem allegedly arising from the vacuum fluctuations of quantum matter fields. An explicit calculation shows that the problem disappears if the pertinent continuum limit is performed in the improved way advocated here. A further application concerns the thermodynamics of de Sitter space where the approach offers a natural interpretation of the micro-states that are counted by the Bekenstein-Hawking entropy.

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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