Quantum mechanics governs both fundamental particles and large objects, but for the latter, a myriad of different factors conspire to mask its effects and render deviations from a purely classical description all but invisible. However, careful and controlled experiments can reveal purely quantum mechanical phenomena of large objects. On pages 622 and 625 of this issue, Kotler et al. (1) and Mercier de Lépinay et al. (2), respectively, report experimental examples of the direct observation of two effects of quantum mechanics in macroscopic objects that cannot be seen classically. Kotler et al. report direct evidence of quantum entanglement of macroscopic objects (vibrating drumhead membranes), and Mercier de Lépinay et al. detect and even evade back-action in quantum-mechanical measurements of an analogous system.

量子力学控制着基本粒子和大物体，但是对于后者，无数种不同的因素共同掩盖了它的作用，并使得与纯经典描述的偏差几乎消失了。但是，仔细而受控的实验可以揭示大物体的纯粹量子力学现象。在此问题的第622页和第625页上，Kotler等人。（1）和Mercier deLépinay等。（2）分别报告了在宏观物体中无法直接观察到的量子力学两种作用的直接观察的实验实例。Kotler等。报告了宏观物体（振动鼓皮膜）的量子纠缠的直接证据，Mercier deLépinay等人。在类似系统的量子力学测量中检测甚至逃避反作用。