arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.14371quant-ph
收藏

用量子力学振子探测量子引力效应

Probing quantum gravity effects with quantum mechanical oscillators

M. Bonaldi, A. Borrielli, A. Chowdhury, G. Di Giuseppe, W. Li, N. Malossi, F. Marino, B. Morana, R. Natali, P. Piergentili, G. A. Prodi, P. M. Sarro, E. Serra, … 展开作者

M. Bonaldi, A. Borrielli, A. Chowdhury, G. Di Giuseppe, W. Li, N. Malossi, F. Marino, B. Morana, R. Natali, P. Piergentili, G. A. Prodi, P. M. Sarro, E. Serra, P. Vezio, D. Vitali, F. Marin

摘要:

旨在将引力和量子力学结合起来的唯象模型通常预测在精细的低能实验中可能测量到的效应。例如,位置和动量之间的修改的对易关系,占一个最小的尺度长度,产生一个动力学,可以在额外的哈密顿条款编码。当应用到一个机械振荡器的范例的情况下,这样的条款,在最低阶的变形参数,引入一个弱的固有非线性,因此,偏离经典的轨迹。这一观点激发了几个实验的建议和实现,导致有意义的上限变形参数。所有这些实验都是基于经典的机械振荡器,即,从热态激发。我们确实注意到,退相干,在区分(宏观)系统的经典和量子行为中起着重要作用,通常不包括在唯象量子引力模型中。然而,如果通过考虑引力和量子物理学的联合作用而预测的特殊特征只在纯粹的量子物体上表现出来,也就不足为奇了。基于这一考虑,我们提出了旨在观察可能的量子引力效应的宏观力学振荡器,初步准备在一个高纯度的状态,我们报告的状态,其实现的实验。

英文摘要:

Phenomenological models aiming to join gravity and quantum mechanics often predict effects that are potentially measurable in refined low-energy experiments. For instance, modified commutation relations between position and momentum, that accounts for a minimal scale length, yield a dynamics that can be codified in additional Hamiltonian terms. When applied to the paradigmatic case of a mechanical oscillator, such terms, at the lowest order in the deformation parameter, introduce a weak intrinsic nonlinearity and, consequently, deviations from the classical trajectory. This point of view has stimulated several experimental proposals and realizations, leading to meaningful upper limits to the deformation parameter. All such experiments are based on classical mechanical oscillators, i.e., excited from a thermal state. We remark indeed that decoherence, that plays a major role in distinguishing the classical from the quantum behavior of (macroscopic) systems, is not usually included in phenomenological quantum gravity models. However, it would not be surprising if peculiar features that are predicted by considering the joined roles of gravity and quantum physics should manifest themselves just on purely quantum objects. On the base of this consideration, we propose experiments aiming to observe possible quantum gravity effects on macroscopic mechanical oscillators that are preliminary prepared in a high purity state, and we report on the status of their realization.

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。

↑