New record in quantum superposition: 2000 atoms in two places at once

Scientists at the University of Vienna in collaboration with the University of Basel have tested the quantum superposition principle on a scale as never seen before. Molecules composed of nearly two thousand atoms were brought into a quantum superposition and made to interfere.

In these experiments, the heavy molecules remained in a superposition for more than 7 ms. One of the largest molecules sent through the interferometer, C707H260F908N16S53Zn4, is composed of more than 40,000 protons, neutrons, and electrons, with a de Broglie wavelength that is a thousand times smaller than the diameter of a single hydrogen atom. (

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