The propagator of the finite XXZ spin-$\tfrac{1}{2}$ chain
We derive contour integral formulas for the real space propagator of the spin-$\tfrac12$ XXZ chain. The exact results are valid in any finite volume with periodic boundary conditions, and for any value of the anisotropy parameter. The integrals are on fixed contours, that are independent of the...
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| Format: | Article |
| Language: | English |
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SciPost
2019-05-01
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| Series: | SciPost Physics |
| Online Access: | https://scipost.org/SciPostPhys.6.5.063 |