Finite-temperature lineshapes in gapped quantum spin chains
We consider the finite-temperature dynamical susceptibility χ (ω,q,T) of gapped quantum spin chains such as the integer spin Heisenberg and transverse field Ising models. At zero temperature χ in these models is dominated by a delta-function line arising from the coherent propagation of single-parti...
Main Authors: | Essler, F, Konik, R |
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Format: | Journal article |
Language: | English |
Published: |
2008
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