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arXiv 2103.15424gr-qcmath-phmath.MP
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牛顿极限下的球面空间:宇宙学常数

Spherical space in the Newtonian limit: The cosmological constant

J. M. Isidro, P. Fernandez de Cordoba, J. C. Castro-Palacio

摘要:

在弱引力极限下计算了球面空间的宇宙学常数。为此,我们使用的对偶性开发的本作者在以前的工作。这种二重性使得人们可以把牛顿宇宙学流体当作非相对论性量子力学中单个粒子的概率流体。我们将这种对偶性应用于定义量子力学的时空流形由$\mathbb{R}\times\mathbb{S}^3$给出的情况。这里$\mathbb{R}$代表时间轴,而$\mathbb{S}^3$是一个具有标准圆形度量的三维球体。确定了一个满足宇宙学常数所有要求的量子算符$Λ$,并得到了在量子态的希尔伯特空间$L^2\left(\mathbb{S}^3\right)$中表示$Λ$的矩阵.给出了算符$Λ$在某些量子态下的期望值,与实验测量的宇宙学常数符合得很好.

英文摘要:

We compute the cosmological constant of a spherical space in the limit of weak gravity. To this end we use a duality developed by the present authors in a previous work. This duality allows one to treat the Newtonian cosmological fluid as the probability fluid of a single particle in nonrelativistic quantum mechanics. We apply this duality to the case when the spacetime manifold on which this quantum mechanics is defined is given by $\mathbb{R}\times\mathbb{S}^3$. Here $\mathbb{R}$ stands for the time axis and $\mathbb{S}^3$ is a 3-dimensional sphere endowed with the standard round metric. A quantum operator $Λ$ satisfying all the requirements of a cosmological constant is identified, and the matrix representing $Λ$ within the Hilbert space $L^2\left(\mathbb{S}^3\right)$ of quantum states is obtained. Numerical values for the expectation value of the operator $Λ$ in certain quantum states are obtained, that are in good agreement with the experimentally measured cosmological constant.

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