Des scientifiques observent des atomes tournant à l'envers dans une expérience quantique

Une équipe internationale de chercheurs a observé pour la première fois le transfert de moment cinétique dans un cristal, révélant une inversion inattendue du sens de rotation des atomes. Cette découverte, réalisée à l'aide de puissantes impulsions laser térahertz sur du séléniure de bismuth, met en évidence un effet quantique lié à la symétrie cristalline. Les résultats ont été publiés dans la revue Nature Physics.

L'étude a été dirigée par des scientifiques du Helmholtz-Zentrum Dresden-Rossendorf, de l'Institut Fritz Haber de la Société Max Planck, ainsi que par des partenaires à Berlin, Dresde, Jülich et Eindhoven. Les chercheurs ont utilisé des impulsions laser ultra-puissantes pour induire un mouvement circulaire aux vibrations du réseau et ont suivi les interactions entre les vibrations couplées dans le matériau.

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