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TT: Fachverband Tiefe Temperaturen

TT 18: Superconductivity: Poster

TT 18.38: Poster

Montag, 18. März 2024, 15:00–18:00, Poster C

Many-body effects in microwave-driven gates for transmon qubits — •Christoph Berke and Simon Trebst — Institut für theoretische Physik, Universität zu Köln

Transmon qubits arise from the quantization of nonlinear resonators systems that are prone to the buildup of strong, possibly even chaotic, fluctuations. One may wonder to what extent fast gate operations, which involve the transient population of states outside the computational subspace, can be affected by such instabilities. We here consider the eigenphases and -states of the time evolution operators describing a universal gate set, and analyze them by methodology otherwise applied in the context of many-body physics. Specifically, we discuss their spectral statistic, the distribution of time dependent level curvatures, and state occupations in- and outside the computational subspace.