Exact expectation values of local fields in quantum sine-Gordon model

Lukyanov, Sergei L.; Zamolodchikov, Alexander B.

doi:10.1016/S0550-3213(97)00123-5

Exact expectation values of local fields in quantum sine-Gordon model

Sergei L. Lukyanov
(
- Cornell U., LNS and
- Landau Inst.
)
,
Alexander B. Zamolodchikov
(
- Rutgers U., Piscataway and
- Landau Inst.
)

Nov, 1996

18 pages

Published in:

Nucl.Phys.B 493 (1997) 571-587

e-Print:

hep-th/9611238 [hep-th]

DOI:

10.1016/S0550-3213(97)00123-5

Report number:

CLNS-96-1444,
RU-96-107

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Abstract:

We propose an explicit expression for vacuum expectation values of the exponential fields in the sine-Gordon model. Our expression agrees both with semi-classical results in the sine-Gordon theory and with perturbative calculations in the Massive Thirring model. We use this expression to make new predictions about the large-distance asymptotic form of the two-point correlation function in the XXZ spin chain.

11.10.Kk
Conformal perturbation theory
Integrable quantum field theory
Sine-Gordon model
sine-Gordon model
dimension: 2
field theory: Euclidean
n-point function
approximation: semiclassical
path integral

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Figures(0)

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