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Date Time Quantum wave in helium dimer filmed for first time Anyone entering the world of quantum physics must prepare themself for quite a few things unknown in the everyday world: Noble gases form compounds, atoms behave like particles and waves at the same time and events that in the macroscopic world exclude each other occur simultaneously. In the world of quantum physics, Reinhard Dörner and his team are working with molecules which – in the sense of most textbooks – ought not to exist: Helium compounds with two atoms, known as helium dimers. Helium is called a noble gase precisely because it does not form any compounds. However, if the gas is cooled down to just 10 degrees above absolute zero (minus 273 °C) and then pumped through a small nozzle into a vacuum chamber, which makes it even colder, then – very rarely – such helium dimers form. These are unrivaledly the weakest bound stable molecules in the Universe, and the two atoms in the molecule are correspondingl

Maksim kunitskiMaksim kunitzkiHolger maschkiwitzVitaly efimovSebastian eckartAnton kalininUwe dettmarQingze guanStefan zellerGoethe universityInstitute for nuclear physicsGoethe university frankfurtMarkus schTill jahnkeNature physicsசெபாஸ்டியன் எக்கர்த்