Publications by Fabian Essler

On truncated generalized Gibbs ensembles in the Ising field theory

Journal of Statistical Mechanics: Theory and Experiment IOP Publishing 2017 (2017) 013103-

F Essler, G Mussardo, M Panfil

<p>We discuss the implementation of two dierent 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 <i>G(x) = ⟨Ψ<sup>†</sup>(x)Ψ(0)⟩</i> of the complex fermion field <i>Ψ(x)</i>. We find that both truncated GGEs are able to recover <i>G(x)</i>, but for a given number of charges the semi-local version performs better.</p>

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