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Quantum criticality

A glimpse of a Luttinger liquid

The concept of a Luttinger liquid has recently been established as vital to our understanding of the behaviour of one-dimensional quantum systems. Although this has led to a number of theoretical breakthroughs, only now has its descriptive power been confirmed experimentally.

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Figure 1: Excited modes of a 1D quantum antiferromagnet.
Figure 2: Phase diagram for a generalized system of weakly coupled spin-½ chains.

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Zaliznyak, I. A glimpse of a Luttinger liquid. Nature Mater 4, 273–275 (2005). https://doi.org/10.1038/nmat1358

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