Physics

Quantum mechanics might not need imaginary numbers after all

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Researchers from Heinrich Heine University Düsseldorf and the German Aerospace Center have demonstrated that quantum mechanics can be formulated using only real numbers instead of imaginary numbers. Their analysis, published in Physical Review Letters, challenges the conventional mathematical framework of quantum theory by showing that the use of imaginary numbers, while standard, is not strictly necessary for the theory's formulation. This finding suggests alternative mathematical approaches to describing quantum phenomena may be viable.


This research could lead to new mathematical formulations of quantum mechanics that might simplify certain calculations or provide fresh insights into quantum phenomena. It may also influence how quantum mechanics is taught and understood, potentially making some aspects more intuitive for students and researchers who find the imaginary number framework challenging.


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Physicists from Heinrich Heine University Düsseldorf (HHU) have examined a fundamental property of quantum mechanics in collaboration with the German Aerospace Center (DLR). In an article published in the journal Physical Review Letters, they show that this theory does not necessarily need to be formulated with imaginary numbers—real numbers can, in fact, also be used.

Source: Quantum mechanics theory may work without imaginary numbers, new analysis suggests