String correlation functions of the spin-1/2 Heisenberg XXZ chain

Abstract

We calculate certain string correlation functions, originally introduced as order parameters in integer spin chains, for the spin-1/2 XXZ Heisenberg chain at zero temperature and in the thermodynamic limit. For small distances, we obtain exact results from Bethe Ansatz and exact diagonalization, whereas in the large-distance limit, field-theoretical arguments yield an asymptotic algebraic decay. We also make contact with two-point spin-correlation functions in the asymptotic limit.

23 pages, 4 figures. An incomplete discussion on the limit to the spin-spin correlation function is corrected on page 12

References in corpus (1)

• String correlation functions of the spin-1/2 Heisenberg XXZ chain

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