arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1502.03264quant-ph
收藏

作为量子力学突现性质的时间:第一个实验方法的综合描述

The time as an emergent property of quantum mechanics, a synthetic description of a first experimental approach

E Moreva, G Brida, M Gramegna, V Giovannetti, L Maccone, M Genovese

摘要:

现代物理学中的“时间问题”实质上在于这样一个事实,即广义相对论演化方程和约束的直接量子化产生了宇宙的波函数惠勒-德维特方程,它描述了一个静态的宇宙。Page和Wootters考虑了这样一个事实,即存在由纠缠子系统组成的系统的状态是静止的,但是可以将组成子系统的子系统解释为演化的:这导致他们假设宇宙的全局状态可以被设想为这种静态纠缠状态之一,而子系统的状态可以演化。在这里,我们综合介绍了一个基于PDC偏振纠缠光子的实验,该实验允许用实际例子展示这种想法起作用的情况,即纠缠态的一个子系统充当另一个子系统的“时钟”。

英文摘要:

The "problem of time" in present physics substantially consists in the fact that a straightforward quantization of the general relativistic evolution equation and constraints generates for the Universe wave function the Wheeler-De Witt equation, which describes a static Universe. Page and Wootters considered the fact that there exist states of a system composed by entangled subsystems that are stationary, but one can interpret the component subsystems as evolving: this leads them to suppose that the global state of the universe can be envisaged as one of this static entangled state, whereas the state of the subsystems can evolve. Here we synthetically present an experiment, based on PDC polarization entangled photons, that allows showing with a practical example a situation where this idea works, i.e. a subsystem of an entangled state works as a "clock" of another subsystem.

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。

↑