Quantum computers challenged by many-body chaos

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• Alexander Altland (University of Cologne)
• Thursday 18 May 2023, 14:00-15:00
• TCM Seminar Room.

If you have a question about this talk, please contact Jan Behrends.

From the perspective of many-body physics, the transmon qubit architectures currently developed for quantum computing are systems of coupled nonlinear quantum resonators. A significant amount of intentional frequency detuning (disorder) is required to protect individual qubit states against the destabilizing effects of nonlinear resonator coupling. In this talk, we will discuss the stability of this variant of a many-body localized phase for system parameters relevant to current quantum processors. An essential element in of our diagnostic toolbox are classical simulations, which can be run, e.g., for upcoming IBM designs comprising hundreds of qubits. The overall conclusion of this study is that it will take considerable engineering efforts to protect transmon quantum computers from the destructive influence of chaotic fluctuations.

This talk is part of the Theory of Condensed Matter series.

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