Regensburg 2019 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 29: Many-body Quantum Dynamics

DY 29.2: Vortrag

Mittwoch, 3. April 2019, 10:00–10:15, H19

Localization Dynamics on a Quantum Computer — •Adam Smith, Florian Mintert, Peter Haynes, Myungshik Kim, and Johannes Knolle — Imperial College London, London UK

Universal quantum computers are potentially an ideal setting for simulating collective quantum dynamics that is out of reach for classical digital computers. We use a state-of-the-art IBM quantum computer to study one of the paradigmatic examples of condensed matter physics -- we simulate the effects of disorder and interactions on quantum particle transport. Our benchmark results show that the quality of the current machines is below what is necessary for quantitatively accurate continuous time dynamics of observables and reachable system sizes are small comparable to exact diagonalization. On the plus side, we are successfully able to demonstrate clear qualitative localization behaviour that matches the expected many-body localization physics in a number of different settings. New optimization protocols combined with a roadmap for the study of localization phenomena on IBM machines hold a lot of promise for what can be simulated on near-term universal quantum computers.