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arXiv · 1610.02495

On Truncated Generalized Gibbs Ensembles in the Ising Field Theory

F. H. L. Essler·G. Mussardo·M. Panfil
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Abstract

We discuss the implementation of two different truncated Generalized Gibbs Ensembles (GGE) describing the stationary state after a mass quench process in the Ising Field Theory. One truncated GGE is based on the semi-local charges of the model, the other on regularized versions of its ultra-local charges. We test the efficiency of the two different ensembles by comparing their predictions for the stationary state values of the single-particle Green's function $G(x) = \langle \psi^{\dagger}(x) \psi(0) \rangle$ of the complex fermion field $\psi(x)$. We find that both truncated GGEs are able to recover $G(x)$, but for a given number of charges the semi-local version performs better.

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BibTeXRIS

F. H. L. Essler, G. Mussardo, M. Panfil. 2016-10-08. On Truncated Generalized Gibbs Ensembles in the Ising Field Theory. https://doi.org/10.1088/1742-5468/aa53f4

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