Quenches and confinement in a Heisenberg-Ising spin ladder

Federica Maria Surace; Gianluca Lagnese; M\'arton Kormos; Pasquale Calabrese

Quenches and confinement in a Heisenberg-Ising spin ladder

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arxiv 2110.09472 v1 pith:E6TQHSPK submitted 2021-10-18 cond-mat.stat-mech cond-mat.str-el

Gianluca Lagnese , Federica Maria Surace , Márton Kormos , Pasquale Calabrese This is my paper · ORCID

classification cond-mat.stat-mechcond-mat.str-el

keywords confinementheisenberg-isingladdermodelspinaffectsanalysisarchetypal

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We consider the quantum quench dynamics of a Heisenberg-Ising spin ladder which is an archetypal model in which confinement of elementary excitations is triggered by internal interactions rather than an external field. We show that the confinement strongly affects the light cone structure of correlation functions providing signatures of the velocities of the mesons of the model. We also show that the meson masses can be measured from the real time analysis of the evolution of the order parameter.

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