Quantum mechanics redefined: Imaginary numbers may not be essential after all

Researchers from DLR and HHU have challenged a long-standing belief in quantum mechanics. Their work suggests that quantum states can be described without using imaginary numbers. The findings were published in Physical Review Letters and have drawn significant attention in the scientific community. The team demonstrated that quantum states can be expressed using only real numbers. This alternative approach maintains full consistency with experimental results from standard quantum mechanics. Their research implies that imaginary numbers, while useful, may not be a fundamental requirement for understanding quantum systems.

The American Physical Society recognised the importance of this work by featuring it as a 'Highlight'. The study also offers a new perspective on entanglement and coherence, key aspects of microscopic quantum phenomena. According to the researchers, this formulation could provide a more intuitive way to grasp the foundations of quantum theory. The findings open a fresh pathway for examining quantum mechanics and its applications. They propose that imaginary numbers might serve as a practical tool rather than a necessary component of the theory. The research preserves all experimental predictions while simplifying the mathematical framework.