Regensburg 2025 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 15: Quantum Coherence and Quantum Information Systems (joint session TT/DY)

TT 15.1: Hauptvortrag

Dienstag, 18. März 2025, 09:30–10:00, H31

Solving Many-Body Problems on Quantum Computers — •Benedikt Fauseweh — TU Dortmund University, Otto-Hahn-Str 4, 44227 Dortmund

In this talk, I will provide an overview on the state-of-the art in digital quantum simulations (DQS) for many-body systems [1]. Modern quantum computers present challenges due to the noisy nature of these systems. Novel quantum algorithms, especially hybrid classical-quantum algorithms [2], have been developed to fit the specifications of such devices. For DQS, the prevailing question today is: What problems are amenable to be simulated on noisy quantum computers? I will discuss recent work on simulating quantum many-body dynamics [3], algorithmic advances to detect ground state phase transitions and the potential of stabilizing exotic non-equilibrium phases of matter, e.g., discrete time crystals [4], using quantum-classical feedback.

[1] B. Fauseweh, Nat. Comm. 15, 2123 (2024).

[2] B. Fauseweh and J.-X. Zhu, Quantum 7, 1063 (2023).

[3] B. Fauseweh and J.-X. Zhu, Quantum Inf. Process. 20, 138 (2021).

[4] G. Camacho and B. Fauseweh, Phys. Rev. Res. 6, 033092 (2024).

Keywords: Digital Quantum Simulation; Discrete Time Crystals; Quantum Algorithms