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Ultracold cesium atoms reveal Bethe strings predicted nearly a century

Ultracold cesium atoms reveal Bethe strings predicted nearly a century ago

In 1931, physicist Hans Bethe predicted that, in certain one-dimensional quantum systems, particles can bind together to form multi-particle states known as Bethe strings. Unlike ordinary molecules, which are held together by chemical bonds, Bethe strings arise purely from…

Source: Phys.org Quantum · Opens in new tab