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QI: Fachverband Quanteninformation
QI 12: Poster I
QI 12.2: Poster
Dienstag, 19. März 2024, 11:00–14:30, Poster B
Kibble-Zurek scaling in the presence of quantum many body scar states — •Lukas Windgätter1 and Benedikt Fauseweh1,2 — 1Deutsches Zentrum für Luft und Raumfahrt, Linder Höhe, 51147 Köln, Germany — 2TU Dortmund, Fakultät für Physik, Otto-Hahn-Straße 4, 44227 Dortmund, Germany
The Kibble-Zurek (KZ) mechanism describes the formation of topological defects in a physical system that is driven across a continuous phase transition. These topological defects arise due to the diverging correlation length and relaxation time at the critical point and their number scales with the rate at which the system is driven across its transition. Due to its nature, the KZ mechanism provides an excellent test for quantum annealing simulations. Indeed it has recently been shown via the KZ scaling, that the newest generation of quantum annealers are capable of coherently simulating spin systems such as the one dimensional Ising chain. A fundamental question concerns the interplay of the KZ mechanism with non-ergodic systems, such as quantum many-body scar states. In our work we are investigating the KZ-mechanism in the presence of such quantum many body scar states in the one dimensional Ising ladder. We present results how the scar states alter the KZ effect and the onset of decoherence using both classical simulations employing matrix product states and coherent quantum annealing simulations.
Keywords: quantum annealing; matrix product states; ergodic systems; quantum scars; Kibble-Zurek mechanism