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

نویسندگان

  • Michael Bortz
  • Jun Sato
  • Masahiro Shiroishi
چکیده

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.

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تاریخ انتشار 2008