论文标题

最小长度RICCI标量的期望值

Expectation values of minimum-length Ricci scalar

论文作者

Pesci, Alessandro

论文摘要

在本文中,我们考虑了一个特定的模型,在时空中(空间或时间分离)点之间实施了基本的极限距离$ L_0 $,在最近的过去,它表现出了一个有趣的功能,即具有最低长度的RICCI量表$ r _ {(q)} $,这些功能与普通的Ricci scalar $ r $ r_ r_ r_ r_ l _ l _ l l_ l l_ l l_ l l_ l l_ l l_ l l_ l l_ l l_ l l_ l l_ l l_ l l_ l l_ l l_ l l_ l l_ l l_ l l_ l l_ l l_ l。 $ r _ {(q)} $在某个点上取决于实现最小距离的方向。在这里,我们指出的是,无论如何,$ r _ {(q)} \ to r $ to $ l_0 \至0 $限制无论如何都以放松或普遍的意义恢复,这是当我们平均方向上的平均值时,这表明我们可能会以$ r _ {(q)}的期望值为量子。它仍然像我们无法识别的事实一样有趣(这意味着这不仅仅是在上面的广义意义上等同)$ r _ {(q)} $与$ l_0 \至0 $限制中的$ r $,即当我们获得普通的spacetime时。 Thing is like if, even when $L_0$ (read here the Planck length) is far too small to have any direct detection of it feasible, the intrinsic quantum nature of spacetime might anyway be experimentally at reach, witnessed by the mentioned special feature of Ricci, not fading away with $L_0$ (i.e. persisting when taking the $\hbar \to 0$ limit).

In this paper, we consider a specific model, implementing the existence of a fundamental limit distance $L_0$ between (space or time separated) points in spacetime, which in the recent past has exhibited the intriguing feature of having a minimum-length Ricci scalar $R_{(q)}$ that does not approach the ordinary Ricci scalar $R$ in the limit of vanishing $L_0$. $R_{(q)}$ at a point has been found to depend on the direction along which the existence of minimum distance is implemented. Here, we point out that the convergence $R_{(q)}\to R$ in the $L_0\to 0$ limit is anyway recovered in a relaxed or generalized sense, which is when we average over directions, this suggesting we might be taking the expectation value of $R_{(q)}$ promoted to be a quantum variable. It remains as intriguing as before the fact that we cannot identify (meaning this is much more than simply equating in the generalised sense above) $R_{(q)}$ with $R$ in the $L_0\to 0$ limit, namely when we get ordinary spacetime. Thing is like if, even when $L_0$ (read here the Planck length) is far too small to have any direct detection of it feasible, the intrinsic quantum nature of spacetime might anyway be experimentally at reach, witnessed by the mentioned special feature of Ricci, not fading away with $L_0$ (i.e. persisting when taking the $\hbar \to 0$ limit).

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