Bogoliubov quasiparticles are elementary single-particle excitations in superconducting materials that carry spin. Luka Pavešič and Rok Žitko have developed a model for hybrid quantum devices composed of two superconducting islands coupled via a semiconducting quantum dot and predicted the existence of an “overscreened” ground state. In this state one quasiparticle from each island attempts to entangle with the spin of the electron trapped in the quantum dot, which leads to a ferromagnetic alignment between spins in the islands on a long distance. The predictions have been confirmed by experimentalists at Niels Bohr Institute in Copenhagen in a carefully built artificial nanostructure made of indium arsenide by measuring stability diagrams, excitation spectra and magnetic-field response. Chains of alternating quantum dots and superconducting islands could be used in the future to build quantum simulators for studying the properties of spin chains. The work was published in Nature Communications.