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arXiv 1402.3155gr-qc
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量子约化圈引力:半经典极限

Quantum Reduced Loop Gravity: Semiclassical limit

Emanuele Alesci, Francesco Cianfrani

摘要:

我们讨论了半经典极限的量子约化圈引力,最近提出的模型,以解决量子动力学的早期宇宙。我们应用全圈量子引力中发展起来的方法定义了运动学希尔伯特空间中的半经典态,并计算了欧几里德标量约束的期望值,证明了它与经典表达式{ \it,即}一个当地的比安奇一号动力公司这一结果是宇宙标度因子的首阶展开,为研究半经典动力学的次首阶修正开辟了道路。我们概述了如何通过保留一个合适的有限的坐标长度的完整性,我们的有效哈密顿在领先的顺序与预期的LQC相一致。这一结果是确定LQG和LQC之间对应关系的重要一步。

英文摘要:

We discuss the semiclassical limit of Quantum Reduced Loop Gravity, a recently proposed model to address the quantum dynamics of the early Universe. We apply the techniques developed in full Loop Quantum Gravity to define the semiclassical states in the kinematical Hilbert space and evaluating the expectation value of the euclidean scalar constraint we demonstrate that it coincides with the classical expression, {\it i.e.} the one of a local Bianchi I dynamics. The result holds as a leading order expansion in the scale factors of the Universe and opens the way to study the subleading corrections to the semiclassical dynamics. We outline how by retaining a suitable finite coordinate length for holonomies our effective Hamiltonian at the leading order coincides with the one expected from LQC. This result is an important step in fixing the correspondence between LQG and LQC.

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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