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Quantum many-body physics

Confinement in a quantum magnet

It is well established that protons and neutrons are bound states of quarks. Now magnetic excitations in systems of coupled spin chains are observed to consist of fractional constituent particles as well.

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Figure 1: Spinon confinement in coupled spin chains.

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Greiter, M. Confinement in a quantum magnet. Nature Phys 6, 5–6 (2010). https://doi.org/10.1038/nphys1493

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