Dresden 2026 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 45: Many-body Systems: Equilibration, Chaos, and Localization (joint session DY/TT)
TT 45.1: Vortrag
Mittwoch, 11. März 2026, 09:30–09:45, HÜL/S186
Compression of Floquet random circuits — •Francesca De Franco1,2, David Luitz3, Dante Kennes4, Matteo Rizzi1,5, and Markus Schmitt1,2 — 1FZ Juelich, Institute of Quantum Control (PGI-8) — 2University of Regensburg — 3University of Bonn — 4RWTH Aachen University — 5University of Cologne
Current quantum computing hardware suffers from significant dissipation due to the coupling to the environment. This limits the depth of unitary quantum circuits which can be applied with high fidelity and hence the physical timescales reachable by digital quantum simulation. Here, we show that the reachable timescale in practice depends strongly on the physics of the many-body system under investigation: For systems deep in a many-body localized phase, we can find shallow circuit representations of the evolution operator U to late times, while in a chaotic regime this is not possible. The associated compressibility of the late time evolution operator is hence associated with the accessibility of long times on noisy quantum hardware. Moreover, we compare the performance of these compressed, variationally obtained circuits to tensor-network simulations, which allow us to compute quantum-information-spreading diagnostics such as entanglement entropy and out-of-time-ordered correlators.
Keywords: Many-body localization; Random circuits; optimal compression; Tensor networks; Floquet circuits