The form factor bootstrap approach is used to compute the exact contributions in the large distance expansion of the correlation function $$ of the two-dimensional Ising model in a magnetic field at $T=T_c$. The matrix elements of the magnetization operator $sigma(x)$ present a rich analytic structure induced by the (multi) scattering processes of the eight massive particles of the model. The spectral representation series has a fast rate of convergence and perfectly agrees with the numerical determination of the correlation function.
The spin-spin correlation function in the two-dimensional Ising model in a magnetic field at T=T_c / Delfino, G.; Mussardo, G.. - In: NUCLEAR PHYSICS. B. - ISSN 0550-3213. - 455:3(1995), pp. 724-758. [10.1016/0550-3213(95)00464-4]
The spin-spin correlation function in the two-dimensional Ising model in a magnetic field at T=T_c
Delfino, G.;Mussardo, G.
1995-01-01
Abstract
The form factor bootstrap approach is used to compute the exact contributions in the large distance expansion of the correlation function $$ of the two-dimensional Ising model in a magnetic field at $T=T_c$. The matrix elements of the magnetization operator $sigma(x)$ present a rich analytic structure induced by the (multi) scattering processes of the eight massive particles of the model. The spectral representation series has a fast rate of convergence and perfectly agrees with the numerical determination of the correlation function.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
