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) = 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.
On truncated generalized Gibbs ensembles in the Ising field theory / Essler, F. H. L.; Mussardo, G.; Panfil, M.. - In: JOURNAL OF STATISTICAL MECHANICS: THEORY AND EXPERIMENT. - ISSN 1742-5468. - 2017:1(2017), pp. 1-13. [10.1088/1742-5468/aa53f4]
On truncated generalized Gibbs ensembles in the Ising field theory
Mussardo G.;
2017-01-01
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) = 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.| File | Dimensione | Formato | |
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