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TT: Fachverband Tiefe Temperaturen

TT 11: Superconductivity: Poster

TT 11.44: Poster

Montag, 17. März 2025, 15:00–18:00, P4

Development of a Two-Level Defect Microscope with Superconducting Quantum Circuits — •David Mazibrada¹, Johannes Schwenk¹, Jürgen Lisenfeld¹, Hannes Rotzinger^1,2, Philip Willke¹, and Alexey V. Ustinov^1,2 — ¹Physikalisches Institut, 76131 Karlsruhe, Germany — ²Institut for Quantum Materials and Technologies, 76131 Karlsruhe, Germany

The development of superconducting quantum circuits has drawn attention to the study of microscopic two-level systems (TLS), as they are a source of decoherence and instability of qubits. Individual TLS can be manipulated using microwave signals, but their specific locations in quantum circuits remain largely unclear. We intend to manipulate the qubit coupled TLS using the electric field of an atomic force microscope tip. This approach allows us to gain insights into the microscopic nature of the TLS. We will present the development of the quantum defect localization experiment which is based on a cryogenic atomic force microscope and superconducting quantum circuits.

Keywords: Qubits; Two Level Systems; Atomic Force Microscopy