Quantum gravitational decoherence of a mechanical oscillator from spacetime fluctuations

被引：2

作者：

Donadi, Sandro ^{[1
,2
]}

Fadel, Matteo ^{[3
]}

机构：

[1] Queens Univ, Ctr Quantum Mat & Technol, Sch Math & Phys, Belfast BT7 1NN, Antrim, North Ireland

[2] Ist Nazl Fis Nucleare, Trieste Sect, Via Valerio 2, I-34127 Trieste, Italy

[3] Swiss Fed Inst Technol, Dept Phys, CH-8093 Zurich, Switzerland

来源：

PHYSICAL REVIEW D | 2025年 / 111卷 / 02期

基金：

瑞士国家科学基金会;

关键词：

GENERALIZED UNCERTAINTY PRINCIPLE; PLANCK-SCALE PHYSICS; MINIMAL LENGTH; GRAVITY; PARAMETER; TESTS;

D O I：

10.1103/PhysRevD.111.026009

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We consider the scenario of a fluctuating spacetime due to a deformed commutation relation with a fluctuating deformation parameter or to a fluctuating metric tensor. By computing the resulting dynamics and averaging over these fluctuations, we find that a system experiences a decoherence in the momentum basis. We studied the predictions of the model for a free particle and an harmonic oscillator. Using experimental data taken from a mechanical oscillator prepared in quantum states of motion, we put a bound on the free parameters of the considered model. In addition, we comment on how these measurements can also provide bounds to other phenomenological quantum gravity models, such as the length scale for nonlocal dynamics.

引用

页数：7

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