Regensburg 2025 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 55: Superconducting Electronics: SQUIDs, Qubits, Circuit QED III

TT 55.13: Talk

Friday, March 21, 2025, 12:45–13:00, H36

Study of the quarton-quarton qubits interaction — •Hossam Tohamy¹, Alex Kreuzer¹, Andras Di Giovanni¹, Thilo Krumrey¹, Hannes Rotzinger^1,2, and Alexey V. Ustinov^1,2 — ¹Physikalisches Institut (PHI), Karlsruhe Institute of Technology (KIT) — ²Institute for Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT)

Tunable qubits are a useful resource in superconducting quantum processors to enable high-performance quantum gates. While much of the recent focus has been on the exploration of transmon multiqubit architectures, the quarton qubit [1] offers a three- to five-times higher and, in addition, positive anharmonicity. In this work, we experimentally study the interaction between two quarton qubits. We have performed spectroscopy and time-domain measurements on these qubits system, and compared the experimental results with theoretical model.

[1] F. Yan et al., arXiv:2006.04130 (2020).

Keywords: Superconducting qubits; Quarton qubits