Abstract
AbstractOne-dimensional quantum spin systems with short-range interaction are strongly fluctuating many-body systems under most circumstances. Any spontaneous magnetic long-range order (LRO) that might exist in the ground state is destabilized by thermal fluctuations at all nonzero temperatures no matter how small. Even at T=0 the order parameter is, in general, considerably reduced by correlated quantum fluctuations. It is not unusual that the zero-point motion prevents the onset of magnetic ordering entirely and gives rise to a ground state that is either critical or magnetically disordered.KeywordsSpectral WeightRecursion MethodDynamic Structure FactorQuantum Spin ChainLuttinger ModelThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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