Regensburg 2022 – wissenschaftliches Programm

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QI: Fachverband Quanteninformation

QI 10: Quantum Simulation and Many-Body Systems

QI 10.1: Hauptvortrag

Donnerstag, 8. September 2022, 09:30–10:00, H9

Entanglement Transition in the Projective Transverse Field Ising Model — •Hans Peter Büchler — Institut für theoretische Physik III, Universität Stuttgart

Discrete quantum trajectories of systems under random unitary gates and projective measurements have been shown to feature transitions in the entanglement scaling that are not encoded in the density matrix. Here we present the projective transverse field Ising model, a stochastic model with two noncommuting projective measurements and no unitary dynamics, and demonstrate the appearance of an entanglement transition. This transition is connected to quantum error correction, and we demonstrate the most efficient decoding of stored quantum information. Especially, we show that the ability to retrieve stored quantum information can serve as an experimental tool to detect such entanglement phase transitions.