标题： 重温单模量子宇宙学 显示英文标题

标题： Revisiting Unimodular Quantum Cosmology

摘要： 在最小超空间中，单模引力的量子化导致由哈密顿量生成的状态的时间演化，如同在通常的量子力学中一样。 我们重新审视了文献 \cite{unruh}中的分析，将其扩展到幻影标量场。 据称只有在这种情况下才能获得非平凡的标量场演化。 标度因子的行为表现为反弹随后是de Sitter膨胀，当源由舒茨变量描述的宇宙项给出时，再现了广义相对论中的量子宇宙学场景。 分析被扩展到Brans-Dicke标量张量理论。 显示英文摘要

摘要： The quantization of unimodular gravity in minisuperspace leads to a time evolution of states generated by the Hamiltonian, as in usual quantum mechanics. We revisit the analysis made in Ref. \cite{unruh}, extending it to phantom scalar fields. It is argued that only in this case a non-trivial evolution for the scalar field can be obtained. The behavior of the scale factor presents a bounce followed by a de Sitter expansion, reproducing the quantum cosmological scenario in General Relativity when the source is given by a cosmological term described by the Schutz variable. The analysis is extended to the Brans-Dicke scalar tensor theory.