Quantum Coherence: Harvard Scientists Uncover Hidden Order in Chemical Chaos

Harvard scientists have demonstrated that quantum coherence can persist through chemical reactions in ultracold molecules, suggesting broader applications for quantum information science and potentially in more common environmental conditions.

The work was undertaken by several members of Ni’s Lab, including Yi-Xiang Liu, Lingbang Zhu, Jeshurun Luke, J.J. Arfor Houwman, Mark C. Babin, and Ming-Guang Hu. The results revealed that quantum coherence was preserved within the nuclear spin degree of freedom throughout the reaction. The survival of coherence implied that the product molecules, K2 and Rb2, were in an entangled state, inheriting the entanglement from the reactants. Furthermore, by deliberately inducing decoherence in the reactants, the researchers demonstrated control over the reaction product distribution.

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